IMACS progress report no. 45 B. Bigelow 15 January 2002 Project Status Currently scheduled tasks: Status: a) DSS redesign (Hare) IP b) DSS drafting (Cleary) IP c) DSS fabrication (Kowal, Castillo) IP d) Calibration system mech. des. (Hare) IP e) Coll. opto-mech assembly (Bigelow) done f) Long camera opto-mech assembly (Bigelow) IP g) Principal Guider Camera elec. assy (Asa) on sched. h) Science Array controller fab (Burley) 95% compl. i) Filter procurement (Sutin) IP j) Grism procurement (Sutin) IP k) Motion control electronics design (Bagish) 95% compl. l) MC fab. (Asa) 50% compl. m) Control software design (Birk) on sched. n) Instrument structure design (Gunnels) on sched. o) Instrument carriage design (Gunnels) on sched. p) Instrument structure fabrication (M&T) on sched, due 1/31/02 q) Instrument carriage fabrication (Rettig) on sched. due 1/31/02 Project events in December: - Electronics staffing changes: Alan Bagish (OCIW) has taken over full responsibility for completion of the IMACS instrument control electronics from Dave Carr. Joe Asa has left OCIW, but will be continuing to work on IMACS on a consulting basis. - The short camera asphere fabrication contract has been let to Tinsley Labs. Lens blanks and spares have been delivered to Tinsley, and the lenses are due at OCIW on 9/30/02. - The instrument carriage fabrication contract was let to Rettig Machine Latest construction images can be seen on the IMACS web site: http://www.ociw.edu/instrumentation/imacs See the latest images of: Instrument structure Optics (Sutin) 1) Short camera spherical lenses: The crystal boundary in S05 has become invisible upon polishing (good news). S03 and S05, the remaining CaF2 elements, are almost done. 2) Short camera aspheres: The blanks have arrived at Tinsley. The contract has been signed by the Director and sent to Tinsley. Delivery time is 8 months, but we expect it might be shorter. 3) Joe Appels from TORC will probably come in the next few weeks to look at the bizarre patterns on one surface of L05. 4) Richardson Grating Labs has offered to make entire grisms, rather than just applying the rulings. I have sent them an RFQ for the 200 l/mm and 300 l/mm grisms. We have a short panic for a few days when they informed us that they had no 200 l/mm ruling large enough, but a search of their shelves turned up a brand new master not listed in the current catalog. An RFQ for the 600 l/mm grism should go out shortly. 5) Checking out the opto-mechanics of the guiders is going slowly, due to small, irritating, time-consuming, but not deadly problems. 6) I ordered the best eyepiece in the Known Universe for Suit and Tie observing with IMACS using the long camera, which has a nice f/4.3 focus. Sadly, I discovered that this particular eyepiece has a buried focus, almost 2 inches inside the optic, so we can't use it. The company we purchased it from has gone out of business. Can anyone think of a good use for an 82-degree FOV eyepiece with 19mm of eye relief? 7) The UMD NSF proposal for a Fabry-Perot was rejected. 8) The BVRI filters should be dribbling in from Barr over the next month. The I filters are finished, and being shipped. Electronics (Bagish/Asa) Bagish: - Chassis 2 has been tested. A couple of problems were found and fixed. - Miscellaneous components, construction supplies and spare parts have been ordered. - Hard stops are being modified from invoking a total system shutdown to individual system shutdown. - Minor design changes and minor fixes have been made to the schematics so that the system will work. Software (Birk/Clardy) Birk: - Filters-Server-2 is working fine. It passed horizontal testing last month and I did not do any vertical testing because that would have required Joe to adjust to the mounting frame. I don't expect there to be a problem since the motor/air-cylinders are identical to FS-1. - We had a first successful test-reading data (no CCD) from the DSP boards into the data-acquisition computer (Linux) using my 'ccdserver' software. The 'camgui' window running on the astronomer workstation (Linux/Solaris) received the data over the network and displayed it in real-time while writing the data to disk. - Joe and I started to work on the principal guider. There is a problem in the encoder wiring, but the motor moves and the filter-solenoid works fine. There are no limit-switches and 'near'-sensors yet, but Joe and Tyson are working on that. During January I plan to do more tests (e.g. check for any positions the principal guider motion stage might 'prefer') on the PR-guider. I also want to continue working on the details of the science-data acquisition/display software (ccdserver,camgui,qltool). Detector Systems (Thomson/Burley) In December, we started to assemble and test the circuit boards that will be used in the IMACS and MIKE electronics. The build includes 8 preamp, 8 signal processing, and 8 clock driver pcbs. Five power boards are already assembled. For the dsp board, we finished the layout revisions and sent out for new blank boards. The parts for the electronics boxes for the MIKE cameras have been sent out for alodyning, and the first MIKE dewar head sent out to be anodized red. The two MIKE dewars have been ordered from IR labs. We've puzzled over the attachment of the IMACS electronics boxes (one for the array, one for the two guide chips) to the dewar, settled on a workable arrangement and started wiring the boxes. The end plates for the large IMACS electronics box is being made in the shop. The two IMACS electronics boxes will be sent out to be anodized blue when those parts are complete. At LCO, two of the guider camera dsp boards and two PCI interface boards were damaged by something like a lightning strike. The lab supply of working PCI boards was sent to Chile, while dsp boards from the spare cameras were pressed into service. Mechanics (Bigelow/Hare) Bigelow: In December: 1) Finished collimator lens/cell potting, assembled baffles completed plumbing and filled doublet with coupling oil 2) Assembled tooling and starting potting of long camera L01 lens/cell 3) Designed imaging mirror cell and mountings to DSS matrix ring drafting started 4) No progress on solid models for structure 5) Completed reassembly of SMS, now awaiting final re-wiring For January: 1) Finish collimator assembly (cells into barrel, spacing checks) 2) Continue long camera lens/cell potting 3) Continue transfer of Gunnels 2D structure designs into MD5 4) Prepare for structure/carriage arrival Hare: Current Work * Minor rework and redesign of miscellaneous guide camera hardware. * Opto-mechanical testing of the Center Field Guide Camera. * Electro-mechanical testing of the Principal Guide Camera. * Assembly of the Shack-Hartmann Guide Camera in preparation for electro-mechanical and opto-mechanical test work * Fabrication of the Disperser Server Wheel Assembly and Main DSS Support Assembly are underway. * Clamp/Latch Assembly and Taper Pin Assembly fabrication is in progress. Future Work * Continue assembly, testing, and rework of all guide cameras as necessary. * Begin fabrication of the Disperser Server Cable Wrap Assembly. * Make revisions to solid models and part drawings of the DSS Main Drive Assembly as needed. * Assemble one Grating Tilt Mechanism for testing. * Design and build tooling to mount the Field Lens into its cell. * Fabrication of the second shutter. * Resume design work of the Calibration Unit. Fabrication (Kowal/Castillo) Kowal: December's Report: 1) D.S.S. - Clamp Mechanism is 90% finished, two pieces require modification and the hook is waiting on a redesign. 2) S.H.G. - Translation Arms were made to mount air cylinders 3) S.M.S. - CFG Frames are nearly completed 4) D.S.S. - Taper pins have been completed by ABR Expectation for January: 1) Complete Taper Pin Assembly 2) Finish remainder of Clamp Mechanism Work 3) Pick up work on S.H.G. & G.T.M. 8) Other Business Next meeting: 10:15, 2/6/2002