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Introduction by PI/Project Manager |
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Instrument Overview and Test Results |
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Operational modes |
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Instrument (general) |
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Stages and subsystems |
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Requirements and performance |
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Current status |
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Test results |
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Software |
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Instrument demonstration |
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Physical instrument interfaces |
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Deliverables |
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Documentation |
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Shipping and handling |
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Integration and commissioning plans |
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Observatory readiness |
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Outstanding Issues & Tasks |
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Spectrographic |
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1,200 lines |
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900
lines |
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600
lines |
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Imaging |
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Band pass of .385 to 1.1 microns |
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Workhorse maximum spectral resolution of ~1A
FWHM |
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Total slit length of 16.3 arcminutes on the sky |
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Approximately 120 slits per mask |
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Spectroscopic image size of 1.3 px (FWHM) |
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OH region accessible at 1.0A FWHM |
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Long slit (not delivered) |
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System throughput 29% (no way to test) |
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Total direct imaging area of 163 arcmin2 |
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Pixel
scale is 0.119 arcseconds per pixel on the sky |
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Direct
image size of 0.2 arcsec (FWHM) in B band, 0.13 arcseconds in all others |
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Throughput 40% for direct imaging |
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Weight – 18,760 lbs in March, 20,000 max |
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Size |
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Flexure & FC System |
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Optical quality |
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Slider 2 (mirror, direct imaging) |
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X=9 px pk-pk, y=14 px pk-pk |
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Slider 3 (grating) |
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X=20 px pk-pk, y=13 px pk-pk |
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Slider 4 (grating) |
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X=16 px pk-pk, y=9 px pk-pk |
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Slider 3 was predicted by FEA to be the worst
case |
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Marked hysteresis is present depending on PA
rotation direction; working FC system is needed |
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Capture range of FC system (from actual tests) |
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X=26 px pk-pk, y=21 px pk-pk |
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Collimator 4 4 |
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Dewar 4 4 |
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Camera 13 13 |
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Grating box 5 5 |
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Grating sliders 6 6 |
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FCS has 26 pixels motion in x direction (motion
of focal plane) |
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FCS has 21 pixels of motion in the y direction
(tilt of the the tent mirror |
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2 -600x1200 CCD in detector plane |
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4 fibers from Cu/Ar light source, placed in
focal plane (attached to slit mask form) |
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Software to be completed after shipping to HI |
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The camera is operating 20C above design
temperature, and optical design predicts some coma at the edge of the
field. The predicted length of tails is 9 px. We see 0 to 14 pixels from
the middle to the edge of the field. The tails are present because the
camera focal length is too long at room temperature, and Element 9 is not
at the right place in the converging beam. This induces primarily radial
coma that should go away at 0C. |
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In the center of the field where coma is not a
problem, we see aberrations that are expected by the optical design
(<<2px rms dia). |
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The bottom line on image quality is that the
real test is at the outer part of the FOV, and we will not be able to say
much until we get to HI at 0C. |
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We have demonstrated a lot of control over
optical aberrations: |
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Radial coma: re-space body 4/ element 9 |
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Lateral coma: moving body 4 in x & y |
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Focus: move body 4 axially (effect on radial
coma not yet investigated) |
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Focus: presently not far enough back of dewar
window, but collimator can be moved forward to cure this. |
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Problem |
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The image quality is not stable - the PSFs
correlate with position angle. There is a phase lag of about 90 degrees
depending on which direction you are rotating. This strongly suggests that
the changes in image PSF are related to the moving element in the camera. |
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Rotation |
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Hatch |
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Slitmask system |
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Collimator |
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Tent mirror/FC Y stage |
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Grating system |
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Camera |
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Filter wheel |
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Shutter |
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Dewar |
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Focus |
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FC X stage |
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LN2 system |
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Detector system |
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CCD controllers |
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Calibration lamps |
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FC light source |
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TV system |
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Electronics enclosures |
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Cladding |
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Hatches and access ports |
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Cable wrap |
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HP temperature system |
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Service connections |
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Carriage mover |
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Kinematic mounts |
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PA drive accuracy ±17 arcsec |
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Slew time through 360: 2 min |
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Driven by a Galil 500-1000c servo motor |
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260/1 harmonic drive |
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12/1 disk/drive wheel |
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Time to insert slitmask <10 sec |
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Time to change from adjacent slitmasks <20
sec |
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Time to change from slitmask 1 to slitmask 13
<60 sec |
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Re-positioning accuracy of slitmask - +/- .0015
inches x,y & 0.030 z |
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46.3 in dia |
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86.5 in focal length |
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3.45 in thick |
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1.46 in sagitta |
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4 in dia center hole |
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Zerodur |
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Al coated (presently) |
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Holding tolerances |
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X,Y +/- 0.020 inches |
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Theta X,Y +/- 20 arcmin |
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Test Results |
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Image motion of +/- 4 pixels |
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Approx 15.2 x 17.8x 2 inch zerodur flat |
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Al coated (presently) |
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Moveable in y direction +/- 10 pixels (theta x) |
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+/- 50 arc sec |
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+/- 45 microns pivot to actuator |
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Stable to +/- 30 arcsec |
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Test Results |
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Stable to ? (less than +/- .4 pixels) |
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Motion repeatable to +/- .2 pixels |
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3 grating and 1 mirror sliders |
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Gratings individually tiltable and do not need
to be re-tilted to move out of beam |
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All sliders kinematically located in beam |
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All 3 gratings are replaceable during daytime
servicing |
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Tilt servo drive (3 sliders) |
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Transport servo drive |
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5 clamps (pneumatic) |
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TILT STAGE |
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Tilt resolution – 1.4 arcsec |
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Tilt Position repeatability 1.4 arcsec |
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Tilt position
stability <<1.4
arcsec |
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TRANSPORT STAGE |
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Position repeatability +/-0.030 in x,y in |
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Position repeatability +/-0.0005 in z |
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Position stability -+/- 10 arcsec |
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Fully assembled with the 2 adaptor rings for
accommodation of shutter, and filter wheel. Dewar bolts directly to top
ring |
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Camera installed in DEIMOS |
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7 filter positions |
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Servo driven through 50/1 gear box |
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Repeatability +/- 0.040” |
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+/- 1 mm travel |
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Resolution
5 microns |
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Accuracy +/- 5 microns |
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Test results |
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Travel - +/- 150 microns |
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Resolution – 6 microns |
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Accuracy - +/- 6 microns |
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Test results |
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24 hr hold time on MK |
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Cool mosaic to –110C on MK |
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Test results |
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22 hrs in SC |
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-100 in SC |
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-90 in few PAs |
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Fabricating new can |
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Greater hold time |
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Better temp control |
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8 video boards |
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Separate power chassis |
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On-board UPS (in DEIMOS carriage) |
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Supports 16-amplifiers (dual amp readout for all
8 ccds) |
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2 video boards |
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On-board UPS |
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Supports 2 amplifiers (single amp readout for
each FC’s ccd) |
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2 Cu/Ar lamps |
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Plan to add “white” LED |
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TV offset guider FOV 3 arcmin2 |
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Minimum TV integration time: 1 sec |
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Maximum TV frame rate: at least 1 per sec |
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TV par focal with DEIMOS focal plane to ±0.040 in |
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TV CCD 1000 x 1000 px |
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TV dark current = 6 e-/p/s liq cooled |
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TV RO noise = ?? |
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8 TV filter slots |
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Insulated and thermally controlled |
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Al covering, 2 inches of poly insulation |
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HP 34970A |
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27 RTD sensors on instrument |
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8 on drive disk |
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8 on barrel |
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8 on camera |
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3 on grating |
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Glycol supply and return |
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Compressed air (>90 psi) |
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Clean and line 110AC |
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3 pair of fibers |
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2 co-ax |
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Glycol |
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Air |
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110 AC |
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Clean power |
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Line power |
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Network |
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Private net |
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Public net |
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Fiber |
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CCD controllers (2 duplex) |
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TV guide camera (1 duplex) |
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Track and carriage system |
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Carriage interlocks to telescope and dome |
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Kinematics |
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Spectrograph including: |
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Main frame |
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Cladding |
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Cable wrap |
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Hand paddles (3 – one for each controller) |
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Emergency interrupt system |
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Entrance window and hatch |
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Slitmask mechanism |
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Slitmask focal plane form with position sensors |
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Collimator, cell and cover |
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Collimator counterweight |
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Tent mirror, cover, and cell |
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Piezo mover for tent mirror |
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Aluminum tent mirror (dummy) |
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Barcode scanner for removable elements |
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Internal barcode scanner for slit masks |
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Hatches and removable service ports (list) |
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Grating system including: |
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3 grating sliders with tilt mechanisms |
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1200 line/mm grating + cell and cover |
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900 line/mm grating + cell and cover |
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831 line/mm grating + cell and cover
(supplied by the DEEP Project) |
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600 line grating + cell and cover |
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Flat mirror + #slider |
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9-element, 15-inch camera with passive thermal
plate scale compensator; front and rear covers |
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7-position science filter wheel including: |
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14 cells |
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5 science filters: (6.25” x 6.25”) |
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B |
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V |
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R |
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I |
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Z |
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2-3 order blocking filters (6.25” x 6.25”) |
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At least 1 glass clear “filter”; possibly 2 such
filters |
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Science shutter |
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Two adaptor plates between camera and dewar |
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Cryogenic detector housing including: |
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Dewar window |
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Focus stage |
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X translation stage |
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CCD mosaic with 8 science 2048x 4096 MIT/LL
high/rho CCDs and 2, 600x1200 FC CCDs |
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Ion pump and electronics |
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Cold finger |
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Detector cryogenic system including: |
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LN2 reservoir and vacuum ion pump and
electronics |
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Cold finger connection to dewar |
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LN2 fill tube to reservoir |
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Detector electronics |
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CCD controller with 8 video boards for 16 amp
readout |
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CCD controller with 2 video boards for FC CCD
readout |
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CCD cabling |
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UPS for CCD controller and detector system |
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TV guider including: |
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8-position filter wheel |
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8 filter holders for TV filter wheel |
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Filters (2” x 2”): |
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B |
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V |
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R |
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I |
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Z |
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x 10 ND |
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x100ND |
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200mm f 1.8 Canon lens |
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TV shutter |
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PXL detector and electronics |
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TV focus mechanism |
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TV fold flat mirror |
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TV offset guider mirror (in focal plane) |
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Calibration lamps and lampholders including: |
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Pen-Ray mini lamps |
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Kr (2) |
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Xe (2) |
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Ar |
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Ne |
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Hg |
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Zn Pen-Ray |
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Cd Pen-Ray |
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Quartz flat field lamp and separate power
supplies |
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FC light source with: |
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Cu/Ar (2) Photron lamps with separate power
supplies and white light LED |
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4 fibers to focal plane and 4 spares |
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Four FC light feeds in focal plane |
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Carriage mover and control electronics |
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2, 8-channel Galil motion control modules and
amplifiers |
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Rotation motor and gear train |
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Renishaw encoder with two read heads |
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1 Dell diskless computer + Galil motion control
card and amplifier for rotation control |
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HP data logger |
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27 Galil temperature sensors |
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3 cooled electronics vaults, 2 on rotating
cylinder, one on carriage |
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Air filter and control system |
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Counterweights for Side B, to keep DEIMOS
balanced |
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Baffles: |
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Focal plane baffle |
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Grating/mirror baffle |
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Possible front external baffle |
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2 VME crates with Motorola power PC boards |
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Video signal cables |
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2 Lantronix terminal servers (one on rotating
cylinder, one on carriage) |
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Instrument control computer |
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Data acquisition computer |
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RAID array for data acquisition computer |
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Slitmask milling infrastructure (including
necessary mods to existing Keck hardware) |
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Software including: |
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Mask design |
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Mask fabrication |
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Mask alignment/object acquisition |
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Mask management (TBD) |
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Spectrograph control |
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Rotation control |
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Detector control |
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Header collection |
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Science data capture |
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Flexure compensation |
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User interfaces/tools removable element
installation |
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Monitoring/logging |
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Database |
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On-line documentation |
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Scripts for instrument calibration |
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Lifting spreader bar for main frame |
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Spare counterweights in case a chassis needs to
be removed |
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Miscellaneous fixtures for the many complicated
setups, too numerous to mention, but we have several cabinets full (will
list later) |
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Tent mirror aluminizing fixturing. |
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Assorted slitmasks with patterns of slitlets and
holes for optical tests |
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Retainers and clamps for securing various items
during shipping (list needed) |
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Grating file for storage |
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Filter file for storage |
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Cart for holding spare gratings during grating
installation/removal |
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Fixtures/slings for removal/installation of: |
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Camera |
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Tent Mirror |
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Collimator mirror |
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Dewar |
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Spare optical coupling fluid for camera |
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Spare barcode labels for new filters, gratings |
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Spare barcode labels for slitmasks |
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Spare parts listed separately |
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Canon 200 mm f1.8 lens shared with ESI |
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Galil 500-1000c servo motor |
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Galil 50-1000 servo motor |
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Galil DCM-1580 controller shared with ESI |
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Galil AMP-1140 amp shared with ESI |
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Lambda power supply |
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Rotation computer/controller |
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Rotation drive gear box |
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Bearings for rotation drive/followers |
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Cam followers for kinematics |
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7 science filer holder |
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Set spare Pen-Ray Cal lamps |
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Couplings for all drives |
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Couplant fluid for camera |
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Stage interconnect box(s) |
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Electronic part spares listed on web page
(approx 45 items) |
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SDSU-2 boards shared with ESI |
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Lantronics terminal server |
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Electronics schematics (B size, web-based
versions, plus CD copy) (Barry) |
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Stage data (web page) |
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Web-based description of all mechanical parts
and assemblies (Dave C.) |
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Assembly manual, including use of assembly,
lifting and transport equipment (Dave C.) |
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Maintenance manual for mechanical systems,
including general troubleshooting instructions (Vernon, Jack, CARA) |
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Description of all custom electronic/electrical
systems, including general troubleshooting instructions (Barry, Chris,
CARA) |
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Manuals received with purchased parts (Barry) |
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Operations manuals received with computers
bought by DEIMOS (Bob) |
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Software documentation compliant with KSD-3
(Bob) |
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Zemax files of optical system on CD plus all
available data on optical elements, including reflectivity curves for
gratings, transmission curves for filters, AR coating performance files
from Coherent, and measurements of surface errors when available (Sandy) |
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Optical alignment procedures (Sandy, David H ,
Jack, Vernon) |
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Summary report on optical performance (image
quality, distortion, astrometry, throughput) (Drew/Sandy) |
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Documentation of CCDs (Bob, Richard Stover) |
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CCD electronics manual and drawings (Barry,
Chris) |
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FCS electronics manual and drawing (Barry,
Chris) |
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A document on the FC system as a whole (Sandy) |
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Interface document (Sandy, CARA) |
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PDR document (exists) |
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Mechanical CDR document(exists) |
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Software CDR document(exists) |
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Pre-ship Review document |
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Sea –Matson |
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Air –United Airlines |
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Key dates |
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Oct 31- container and rack leave Lick |
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Nov 8- container and rack arrive in Kawaihae |
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Nov 13- container and rack arrive on Keck summit |
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Nov 26- First and second air shipments |
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Dec 3- third air shipment |
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Matson will truck the container and rack to
Oakland, and they will arrange for pilot cars and necessary permits |
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Kona Transport will truck the container and rack
to the summit of Mauna Kea, and they will arrange for pilot cars and
necessary permits |
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Kona Transport will truck both the empty
container and rack back to Kawaihae |
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Air shipment 1 |
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Camera and assembly equipment |
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Air shipment 2 |
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Collimator |
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Tent mirror |
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Grating assembly |
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Slitmask assembly |
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TV Camera and assembly |
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Filter wheel |
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Electronics |
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Instrument computer |
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Air shipment 3 |
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Dewar and CCD controllers |
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Data-taking computer |
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Camera |
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Air shipped in pieces (4) |
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Boxes designed to take 20 g shock load |
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Other Optics |
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All have appropriate boxes |
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Dewar and CCD controllers |
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Dewar and LN2 can have custom boxes |
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Controllers shipped in Hardigg Cases |
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Computers |
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Air shipped in original boxes where possible |
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Lick will truck all shipments to the airport |
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Lick will truck camera boxes (air shipment 1) to
the summit |
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CARA will be asked to transport air shipment 2
to the summit. Will likely require 2 flat bed trucks |
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Lick will truck air shipment 3 to the summit |
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Thurs Nov 8 – DEIMOS arrives in Kawaihae |
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Mon Nov 12 – assembly crew arrives (6 people, 4
new) |
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Tues Nov 13 – DEIMOS at summit |
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Thurs Nov 15 – lift DEIMOS into Observatory |
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Sat Nov 17 – everyone home for Thanksgiving |
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Mon Nov
26 – crew and two air shipments arrive (require CARA trucks)(8
people) |
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Mon Dec 3 – third air shipment arrives (4 more
people) |
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Fri Dec 21 – home for Christmas |
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Mon Jan 7 – (11 people arrive back in Hawaii to
continue) |
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Fri Jan 18 – (5 people depart with the end of
major assembly) |
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Mon Jan
21 – (2 Software people arrive) |
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Thurs Jan 31 – start of full up instrument tests |
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Thurs Feb 28 – first star light |
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Maximum # of people in HI for assembly – 12 |
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The plan is not to have any one person in HI for
more than 30 days at a time |
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We will have up to 4 vehicles, including 3 4x4s |
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Will bring hoist for smaller lifts |
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Puna Crane |
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Lift from west side of Observatory, onto deck |
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Lift to rails Nov 15 –Puna Crane,
telescope down for morning |
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Test carriage system Nov 28, 29 |
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Complete Camera Ass Dec 6 |
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Install slitmask sys Dec 6 |
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Install grating sys Dec 10 |
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Install inst computer Dec 10 |
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Install TV Dec 18 |
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Install camera Jan 11 –need Jib Crane |
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Install collimator Jan 15 –need Jib Crane |
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Install tent mirror Jan 16 |
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Install dewar Jan 17 –need Jib Crane |
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Install rotation drive Jan 18 |
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Alignment starts Jan 24 |
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Start full up inst test Jan 31 |
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First star light Feb 28 |
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Extend the N platform |
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Reinforce N platform |
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Reinforce N Deck |
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Design , fabricate and install the cable boom |
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Install the N tracks on the DEIMOS side, and
increase rack on deck |
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Increase the elevation axis telescope cable wrap
(done) |
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Run air, glycol, co-ax fiber and power lines to
the cable boom |
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Mount and install DEIMOS computers and disk
drives |
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Interface control document |
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Differential Guiding |
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Configuring of accounts |
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Data archive to tape |
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Telescope interlocks |
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Cryogen Handling |
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commissioning and characterization, image
reduction |
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Documentation of instrument procedures |
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SW for instrument control and initialization |
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Focus procedures |
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Notes