Transcript SAC report - Instrumentation Projects

IMACS:
Inamori-Magellan Areal Camera and
Spectrograph
Magellan SAC Status Report
21/22 September 2002
Boston, MA
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IMACS project team:
A. Dressler
Pr. Investigator
B. Bigelow
Instrument Scientist
B. Sutin, H. Epps
Optical des./eng.
B. Bigelow, T. Hare
S. Gunnels, G. Luppino,
R. Cleary
Mechanical des.
V. Kowal, R. Storts, J. Castillo
Mechanical fab.
A. Bagish, D. Carr, J. Asa
Electronics
G. Burley, I. Thompson, J. Estrada
Detector systems
C. Birk, K. Clardy
Software eng.
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Optics Status:
Collimator:
C01 (Field lens)
Done, installed
C02 - C05
Done, installed
Long Camera:
L01-L06
Done, installed
Short Camera:
S01, S08
At Tinsley, near completion
S02,3,5,7,9
Done, ready to mount
S04
At TORC, second blank
S03, S09
Mounted in cells
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Carnegie S01 Aspheric lens,
Global surface figure error based on average
of two full aperture grid measurements
RMS = .215 waves / 244mm CA.
RMS Slopes of this global grid when frequency filtered for
periods of 1cm and longer = 18 u-radians.
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Carnegie S08 Aspheric lens,
Global surface figure error based on average of two full
aperture grid measurements
RMS = .216 waves / 224mm CA.
This is preliminary data. We are going to re-measure the 90 rotation half of these and
Re-average with zero. Slope measurements with fine line scans are being acquired.
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Optics Status cont.
Filters:
Grisms:
2 sets of CTIO B,V,I,
Done
2 sets of CTIO R
Done
CTIO U (LCAM)
Awaits ADC coating
Sloan u’, g’, r’, i’, z’
Not ordered
200 l/mm
Done, ready to mount
300 l/mm
Polishing at HJOL
600 l/mm
At STF for AR coating
Imaging Mirrors:
Al mirror mounted
Ag mirror done
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200l/mm grism delivered
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First light!
07/18/02
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Mechanical Engineering Status:
Guide camera stages (Hare)
Done, mounted
Calibration lamp system (Hare)
IP
Mask server (Bigelow)
Done, mounted
Field Lens (Hare)
Done, mounted
LCAM shutter (Hare)
Done, mounted
Filter servers (Bond)
Done, 1 mounted
Disperser server (Hare)
Done, except drive
- Grating cells
2 of 6 mounted
- Grism cells
Final design IP
- Mirror cells
Done, 1 mounted
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Mechanical Engineering cont.
Collimator mech. (Bigelow)
Done, mounted
Long camera mech. (Bigelow)
Done, mounted
Short camera mech. (Bigelow)
Done, assy IP
Dewar (Luppino)
Done, mounted
Instrument Structure (Gunnels)
Done
Instrument Carriage (Gunnels)
Done
Instrument Enclosures (Gunnels)
Done, minor mods IP
Instrument Utility wrap (Gunnels)
IP
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Electronic Engineering:
Alan Bagish (OCIW) is completing the electronics design for
IMACS. Joe Asa is providing final assembly services on a
consulting basis. Status of electronics:
Schematics design (all motion stages)
Done
(4) Motion control (MC) chassis,
Done
(1) Power supply chassis,
Done
(1) Shutter control chassis
Done
(2) Electronics racks for chassis
Done
Instr. wiring harnesses
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IP
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Detector systems:
Guide cameras:
- 23 cameras have been fabricated
- IMACS currently has one of three needed
- Remainder by?
Science array:
- First light on 4 CCDs - 7/18/02
- Filled array of 8 CCDs flat to ~40 microns - not done
- Individual detectors flat to 13 microns
- Electronic/software integration IP
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Slit Mask Cutting (Clardy) :
- Mask Generation (MG)
IP
inputs - images, data files, other
output - text file with targets, names, etc.
- Mask Definition (MD)
Done
- inputs - text file from MG, other text files
- output - mask definition file
- database for observing, data reduction
- Mask Fabrication (MF)
Done
- inputs - mask definition file
- output - test, laser G-code, mill G-code, .ps files
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Software:
Instrument Control (Birk)
Individual module testing:
Module
Pr. Guider
SH guider
CF guider
Slit Mask Server
Disperser Server
Long Camera Focus
Filter Servers (2)
Flexure Control
Detector Focus
HP Sensor System
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GUI status
done
done
done
done
50%
done
done
done
50%
done
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H/W tests
80%
80%
90%
75%
10%
90%
90%
75%
10%
60%
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Software:
Instrument Control cont.
Integrated instrument testing:
- One GUI at this level, showing all critical aspects of each
module (encoder positions, limit status, temperatures, etc).
- This GUI is written and 75% tested, unfinished stages
remain (Disperser Server, Grating tilts, detect. focus)
User Level Software:
- Two GUIs at this level:
- Instr. control interface (select a grating, etc.) - 60% done
- Graphical Instr. Status Display - 40% done
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Software:
Science Array Control (Birk)
Shutter control:
- micro-controller for linear motors
90% done
- still need to test second (s-cam) shutter
CCD readout / camera control:
- “ccdserver” for array readout
- “camgui” for user interface
- both are functional
75% done
Quick-Look Tool:
- functional with *real* data
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90% done
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Slit Masks:
Laser system:
- Convergent Gemini 150 W. CO2 laser cutting system
- Installed and operational at LCO
ASB Facility upgrades:
- 200A electrical service
Done
- Air compressor system
Done
- Ventilation, fire, and fume extraction
IP
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Slit Masks:
Slit mask blanks:
- Fabricated by California Hydroforming
- First order of 100 mask blanks complete, at LCO
Mask fabrication cost:
- Estimated to about $150 per mask including laser
- Approx. $100 materials and hydroforming
- Approx. $50 for laser cutting (500 masks/year, 10 years)
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Coming up:
- F/2 camera opto-mechanical assembly 9/02 - 10/02
- F/2 camera shutter completed by end of 9/02
- Utility wrap and wiring harnesses installed by end of 10/02
- Enclosure and hatch completed by end of 10/02
- DSS drive and GTM complete by end of 10/02
- Gratings and grisms in cells by end of 10/02
- Calibration lamps installed by end of 10/02
- Final testing 10/02-11/02
- Pack and ship by middle of 12/02?
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Argon spectrum – 600 l grating, f/4 camera
(09/18/02)
0.385 Å/pixel, ~0.8Å FWHM
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The IMACS fiber positioning system...
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IMACS confirms life on Earth: O2 lines (B-band) in red Solar spectrum
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…holding the objects in the slits while guiding. Measurements are of
the principal guider with respect to the slit mask. Good result.
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Shack-Hartman guider relative to the slit mask. This guides rotation. Close to
specifications (within spec if you consider only about 1 hour exposures), but there
is a balance issue as the barrels are swapped that we should be able to overcome
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Structure flexure with rotation is approximated by 0.6 arcsec circle. Hysteresis is
minimal, ~0.3 pixels. Open loop correction should be sufficient for all but the most
demanding spectral programs (stability better than 0.2 pix)
3-day test: 0, -90,
-180, -270
Piezo control
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Latest test of flexure of grating tilt mechanism. Spatial drift reduced to an
acceptable level (<2 pixels = 0.20 arcsec) for full rotation of structure.
Grating rotation within acceptable range if motor/encoder can steer it out –
yet to be confirmed.
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Outstanding issues as of Sept ‘02
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Flexure of centerfield guider
Assembly and test of f/2 camera
Grating tilt mechanism – meeting specs
Operation of full 8K x 8K mosaic and test of full field
image quality
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