21/22 September 2002IMACS update1 IMACS: Inamori-Magellan Areal Camera and Spectrograph Magellan SAC Status Report 21/22 September 2002 Boston, MA

21/22 September 2002IMACS update2 IMACS project team: A. DresslerPr. Investigator B. BigelowInstrument Scientist B. Sutin, H. EppsOptical des./eng. B. Bigelow, T. Hare S. Gunnels, G. Luppino, R. Cleary Mechanical des. V. Kowal, R. Storts, J. CastilloMechanical fab. A. Bagish, D. Carr, J. AsaElectronics G. Burley, I. Thompson, J. EstradaDetector systems C. Birk, K. ClardySoftware eng.

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21/22 September 2002IMACS update7 Optics Status: Collimator: C01 (Field lens) Done, installed C02 - C05Done, installed Long Camera: L01-L06Done, installed Short Camera: S01, S08At Tinsley, near completion S02,3,5,7,9Done, ready to mount S04At TORC, second blank S03, S09Mounted in cells

21/22 September 2002IMACS update8 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.

21/22 September 2002IMACS update9 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.

21/22 September 2002IMACS update10 Optics Status cont. Filters:2 sets of CTIO B,V,I,Done 2 sets of CTIO RDone CTIO U (LCAM)Awaits ADC coating Sloan u’, g’, r’, i’, z’Not ordered Grisms:200 l/mmDone, ready to mount 300 l/mmPolishing at HJOL 600 l/mmAt STF for AR coating Imaging Mirrors:Al mirror mounted Ag mirror done

21/22 September 2002IMACS update11 200l/mm grism delivered

21/22 September 2002IMACS update12 Current grating selection:

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21/22 September 2002IMACS update14 First light! 07/18/02

21/22 September 2002IMACS update15 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 cells2 of 6 mounted - Grism cellsFinal design IP - Mirror cellsDone, 1 mounted

21/22 September 2002IMACS update16 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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21/22 September 2002IMACS update21 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 chassisDone (2) Electronics racks for chassisDone Instr. wiring harnessesIP

21/22 September 2002IMACS update22 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

21/22 September 2002IMACS update23 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

21/22 September 2002IMACS update24 Software: Instrument Control (Birk) Individual module testing: ModuleGUI statusH/W tests Pr. Guiderdone80% SH guiderdone80% CF guiderdone90% Slit Mask Serverdone75% Disperser Server50%10% Long Camera Focusdone90% Filter Servers (2)done90% Flexure Controldone75% Detector Focus50%10% HP Sensor Systemdone60%

21/22 September 2002IMACS update25 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

21/22 September 2002IMACS update26 Software: Science Array Control (Birk) Shutter control: - micro-controller for linear motors90% done - still need to test second (s-cam) shutter CCD readout / camera control: - “ccdserver” for array readout - “camgui” for user interface - both are functional75% done Quick-Look Tool: - functional with *real* data90% done

21/22 September 2002IMACS update27 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 systemDone - Ventilation, fire, and fume extractionIP

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21/22 September 2002IMACS update30 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)

21/22 September 2002IMACS update31 Coming up: - F/2 camera opto-mechanical assembly 9/ /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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21/22 September 2002IMACS update33 Argon spectrum – 600 l grating, f/4 camera (09/18/02) Å/pixel, ~0.8Å FWHM

21/22 September 2002IMACS update34 The IMACS fiber positioning system...

21/22 September 2002IMACS update35 IMACS confirms life on Earth: O 2 lines (B-band) in red Solar spectrum

21/22 September 2002IMACS update36 …holding the objects in the slits while guiding. Measurements are of the principal guider with respect to the slit mask. Good result.

21/22 September 2002IMACS update37 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

21/22 September 2002IMACS update38 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) Piezo control 3-day test: 0, -90, -180, -270

21/22 September 2002IMACS update39 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.

21/22 September 2002IMACS update40 Outstanding issues as of Sept ‘02 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