IMACS progress report no. 27 B. Bigelow 7 July 2000 1) Project Status Currently scheduled tasks: Status: a) Filter server assy/test (Guerrero) done b) Disperser server (DSS) design (Bond) 2 mo. late c) Shutter assy/test (Guerrero) done d) CF Guider mech. design (Hare) done (2 mo. late) e) CFG drafting (Meyers) starts (3 mo. late) f) CFG fab. (Storts) awaits drafting g) SH Guider design (Hare) started (3 mo. late) h) Mask server fab. (Kowal) on sched. i) Coll. fabrication (external) late start (2 mo. late) j) Long camera mech. design (Bigelow) on sched. k) Dewar fab. (Luppino) late (due 9/30/00) l) Science Array controller des (Burley) re-sched. m) Science Array fab (Burley) re-sched. n) Motion control (MC) electr. design (Carr) re-sched. o) MC fab. (Asa) re-sched. p) Control software design (Birk) on sched. Details: b) DSS late but progressing well. d) CFG design finished 3 mo. late, delayed start of SHG e) New drafter starts 7/10 f) Fab awaits drawings i) Bids received, fab contract let by 7/13/00 k) Dewar is late, now due 9/30/00 l,m) Science array controller des/fab rescheduled by Thompson/Burley n,o) MC electronics late, but not critical Other project events: Staffing news: Assembly technician Richard Guerrero took a position at JPL shortly after finishing the assembly of the FSS and shutter. Thanks for your help, and good luck, Richard! A new temp. drafter, Julie Meyers, starts 7/10. Julie has 20 years of drafting experience, including 10 with AutoCAD and 3 with Mechanical Desktop. Julie will be in Martin Beckett's old office in the labs, and will start immediately on drafting for the disperser server. Robert Storts takes a break from IMACS for July and returns August 1. Joe Asa, Magellan electronics tech, joins the IMACS team in July. Joe will be doing electronic, electrical, and mechanical assembly work, starting with the motion control electronics. 2) Optics (Sutin) 2.1) All the collimator elements are fabricated. Next, Epps will be doing the final re-space. 2.2) C02, C03, and C04 have been dropped off at Newport TFL for coating, along with all of the coating test samples. C05 will be shipped directly to Spectrum TF. The final coating designs have not been decided yet for either coater. 2.3) The lenslet array for the Shack-Hartman has arrived. It has not been checked for correct focal length yet. 2.4) The guider test setup still awaits a guide camera. 2.5) Epps will also check if the short camera aspheres can be reduced in aspheric deviation. Optics TODO List: 1) Baffle analysis, baffle materials 2) TV camera designs 3) Filters 4) Asphere fabrication 5) Pupil simulator? 3) Electronics (Carr) No report this month. 4) Software (Birk/Clardy) Christoph: Most of June I spent on the CameraGUI (Sparc) and the CCDServer (LinuxPC). 'CCDServer' talks to Greg's DSP board, which actually controls the CCD chips, and reads the science data from the DSP. It then sends the data to the 'CameraGUI'. This process (on the Sparc) displays the science data in a quick-look window and writes it to disk. I also started digging into the shutter controller. The command interface it provides does not seem to be sufficient for all modes, but I am working with Dave on a solution. For July I plan to finish the filter-server control and to continue working on the CameraGUI/CCDServer. 5) Mechanics (Bond/Hare/Bigelow/Luppino) Tim: The wiring for the filter server was completed, and the filter server was handed over to Christoph. There are still some small mechanical issues to be sorted out, which will be attended to when Joe becomes available. The solid model for the disperser server tilt mechanism was completed and is ready to be handed over for drafting. I am now beginning work on the portion of the disperser server mechanism that rotates the different gratings/grisms into their location in the beam path. Tyson: Shutter: 1. Assembly of the camera shutter is complete. Simple cycle tests were completed simulating one year of exposures and showed operation to be satisfactory. 2. The shutter has been handed over to electronics and software for further development and integration. 3. Future work on the shutter includes further testing and final mechanical work. CF Guider: 4. Design of the center field guide camera stage is complete. Design for mounting of the camera optics will commence on finalization of camera optics testing. 5. Future work on the center field guide camera includes further development of the solid model and continued opto-mechanical design. SH Guider: 6. It is expected that design of the Shack-Hartmann camera motion will be complete on July 7, 2000. Design for mounting of the camera optics will commence on finalization of camera optics testing. 7. Future guide camera work includes beginning design of the Principal Guide Camera, further opto-mechanical design and continued development of camera solid models. Bruce: Slit Mask Server: Fabrication of the slit mask server has started. The slit mask frames are still due from Rettig Machine. A contract for fabrication of the SMS baseplate was let to CNC Industries in June, for completion in July. A systems integration company is now working on a cost estimate for a 3-axis machine center for milling slits. The machining option is being explored as an option to laser milling. A final selection for slit cutting will be made later this year. California Hydroforming is working on a revised quotation for forming and laser-finishing the slit mask blanks. A set of prototype masks will be ordered in July. Collimator: The collimator test cell has been redesigned to prototype all the features required for an oil-coupled flex-cell multiplet, including fittings for filling and sealing in the coupling oil, oil volume compensator, o-rings, etc. Epoxy material samples have been sent out for testing, and all cell materials are currently being tested for compatibility with the coupling oil. Preliminary assembly of the revised test cell could occur in late July. Bids were received in June for fabrication of the collimator mechanics. The only acceptable bid was $7000 over the original estimate of $35,000. A fabrication contract will be let to Danco Machine as soon as the final optical spacings are set for the collimator (mid July). Fabrication is estimated by Danco to last for 10 weeks, to end 9/30/00, about two months behind schedule. Long Camera: Preliminary flex-cell designs are complete for all of the elements in the long camera. Design of the focus/scale compensation mechanism is well along, and the solid model for the long camera now includes the shutter, filter-server, and dewar body. Design work continues through July. Design of long camera mechanics is on schedule for completion in October. Planned for July: - dewar flexure testing (at GL Scientific) - let contract for slit mask fabrication - assembly of the collimator test cell - let contract for collimator mechanics fabrication - finish design of long camera scale comp. mechanics - start long camera barrel design Gerry Luppino: No report for Luppino this month. The last dewar fabrication contract was let to GL Scientific in June for completion of the cold-side mechanics for the dewar, including the dual Cryotigers, compressors, cold bus bar, and cooling straps. Flexure testing of the focal plane is planned for 7/9 and 7/10. Delivery of the dewar is currently planned for the end of September. 6) Detector Systems (Thompson/Burley) Guider cameras -------------- 1 - integrated and tested 8 more sets of guider camera boards (in addition to two working cameras shipped to Chile). 2 - tested pci<-->dsp interface over 100m cable at 10 Mbps. With the camera grounded only through the 100m cable, there were a few bit errors per frame. After changing the ground connection to go through the power cable to the 48V supply chassis, the link operates with no bit errors. Note to self: be careful of grounding at the telescope. Mosaic cameras -------------- 3 - assembled most of a dsp board, clock driver board, signal processing board, and short backplane for the lab system. There are still a few components missing, but we should be able to begin testing later this month. 4 - the pressure sensor and meter for the test dewar arrived. (Granville-Philips 375 convectron type). This will let us monitor the out-gassing/leak rate of the dewar. 5 - transfered the dsp interface routines to Christoph so that he can begin integrating them into the control software. 6 - the control gui for MIKE has begun to take shape, with a layout on paper being passed around for comments. 7 - Alan B has completed the first version of the code to operate the Keyence sensor and x-y stages for measuring the CCD surface profiles. 8 - adding a rapid cool-down capability to the IMACS dewar is being looked into -- Gerry L estimates the cool-down time for the dewar with cryotigers alone would be 15 hrs. 7) Other Business Next IMACS meeting: 10:15, 8/2/00, new conf. room. Progress reports included above. Meeting notes and action items: Integral Field Units (IFU): Alan has been in contact with Roger Davies regarding IFU's for IMACS. The possibility of a design/build contract with Durham is being explored. A pre-chiller for the dewar is being explored with Gerry Luppino. A small LN2 vessel inside the main dewar could be used to bring the focal plane to operating temperature within a couple of hours, rather than the 15-18 hours currently estimated for the Cryotigers.