IMACS progress report no. 29 B. Bigelow 31 August 2000 1) Project Status Currently scheduled tasks: Status: a) Disperser server (DSS) design (Bond) progressing (4 mo. behind sched.) b) DSS drafting (Meyers) started c) Structure pre-lim layout (Bond) delayed d) CFG fab. (Storts) awaits machinist time e) SH Guider design (Hare) finished f) SHG drafting (Meyers) finished g) Principal Guider design (Bond) finished h) Mask server fab. (Kowal) finished i) Coll. fabrication (Danco) due 10/25 j) Long camera mech. design (Bigelow) on sched. k) Dewar fab. (Luppino) due 9/30/00 l) Science Array controller des (Burley) 90% complete m) Science Array controller fab (Burley) 60% complete n) Motion control (MC) electr. design (Carr) delayed o) MC fab. (Asa) delayed p) Control software design (Birk) on sched. Details: a) DSS design late but making progress i) Collimator fab 3 mo. late start, but no schedule impact Project events: Dave Carr, Magellan Electronics engineer, gave notice in August. Dave has been providing the electronic design for IMACS, and he intends to finish the IMACS electronics work on a consulting basis. Dave's departure is a great loss for OCIW, but we look forward to working with him in his new capacity. Julie Meyers, who started drafting for IMACS in July, has accepted a permanent job offer, and will be leaving 9/7/00. We are hoping to continue working with Julie on a consulting basis as well. We will start looking for a new drafter immediately. 2) Optics (Sutin) 2.1) The optical test setups for both the direct imaging and Shack-Hartmann sides of the center-field guider were successful. 2.2) Optovac is having difficulty making the blank for S02, in the short camera. We are exploring the possibility of obtaining another blank from Schott, or a smaller blank from Optovac. 2.3) Dummy optics have been shipped to Spectrum Thin Film. They can now begin the coating design for the CaF2 elements. 2.4) The Field lens and dummy have been dropped off at Newport Thin Film Labs. They are beginning the process of designing collimator coatings. 2.5) We have received from TORC L01 and L06 for the Long Camera. Joe Appels is now on vacation until Sep 15. 2.6) Raytheon should shortly be sending us a quotation for making our short camera aspheres. Optics TODO List: 1) Baffle analysis, baffle materials 2) TV camera final designs 3) Filters 4) Recheck shutter size 3) Electronics (Carr) No report this month. 4) Software (Birk/Clardy) Birk: We re-adjusted the filter-server after the re-wiring by Joe. For September I plan to investigate the shutter controller and proceed with the science array software. I also plan to do a long test-run with the filter server. Clardy: Clardy is making progress on the guider motion stage simulator, which will allow guide stars to be selected from a catalog, and guider cameras to be positioned around the focal surface by selection of guide stars. A demonstrator with GUI is planned for the end of September. 5) Mechanics (Bond/Hare/Bigelow/Luppino) Tim: Filter server: The filter server is now completed with respect to the wiring and plumbing. With the exception of "lightweighting" of the base plates, all of the mechanical work is complete as well. It is now ready to be put through some more thorough tests in different orientations. Once this is completed, it will be disassembled and the parts sent out for anodizing. The base plates will also be "lightweight ed" at this point. Disperser server: The drafting for the disperser server tilt mechanism is almost completed. A few more drawings are still to be finished (less than 1/2 doz.) and should be complete before Julie leaves next week. A good portion of the solids are already with Vince being programmed for the CNC. I plan to spend September on the remainder of the disperser server mechanism. The next portion that I will examine is the carouse l. Tyson: Guide Cameras: 2. The solid models for all cameras, including revisions from an informal design review held on July 31st, 2000, are now complete. 3. A drawing package, including assembly drawings, for the Center Field Guide Camera is now complete. A first revision of the drawing package for the Shack-Hartmann Guide Camera is complete. 4. CNC programming is complete for the Center Field Guide Camera motion stage. 5. Design for mounting of the camera optics was delayed one week and began on August 22nd and with a target completion date of September 8th, 2000. 6. Future guide camera work for the month of September includes continued design, development, and manufacturing of all three guide cameras. Purchased parts will also be ordered in the next month. Bruce: Slit Mask Server: The mask transfer mechanism was assembled in early August and operated successfully. The parts requiring teflon anodizing were then disassembled, coated, returned, and re-assembled. Mask frames are currently being assembled and the mask select assembly should be assembled and integrated with the transfer assembly in September. A preliminary quote for a CNC mask milling machine was received in August from Newmark Systems. A second quote is being prepared and should arrive in September. Prototype hydro-formed slit masks are due from California Hydroforming in late September. Collimator: The collimator mechanics fabrication contract was let to Danco Inc. in August. Bruce visited the Danco facility in August. The collimator parts are due in late October. The collimator test cell was successfully assembled and filled with oil in August. Optical testing of the lens showed about 5 waves of astigmatism which appears to be due to stressed input by the holding screws during bonding. Thermal testing of the cell will be carried out in September. Long Camera: A three-flexure scale compensation design was completed in August. Three PI actuators will be used to control scale variations with temperature, and two tilt degrees of freedom will be available for flexure control if needed. Finite element models of lenses potted into cells with an elastomer were completed in August. This approach appears to be relatively insensitive to the elastomer material properties, a concern which appears to be unfounded. Elastomeric mounts for the long camera have the potential to simplify the design, and reduce the cost of the long camera mechanics. Planned for September: - complete budget and schedule revisions started in August - complete assembly of SMS stages and start testing - continue design of cells for long camera Gerry Luppino: No report this month. The completed dewar is due at the end of September. 6) Fabrication (Kowal/Storts) SMS: a) finished all parts per dwg package b) assembled SMS less mask frames c) received SMS teflon anodized parts d) started search for high speed spindle for mask cutting Center Field Guider: a) programmed all parts and operations DSS a) programmed all parts for grating cells and tilt mechanism 7) Detector Systems (Thompson/Burley) Guider cameras: 1 - the table-top chiller arrived, so we are now ready to do a multi-week lab test of the CCD dry gas/thermo- electric cooler combination Mosaic cameras: 2 - the pre amp board for the lab test dewar + 4Kx4K + MIKE 2Kx4K is ready to be sent out. The quote from XZX was a bit high ($2850 for minimum lot) so we will send it to a few other places for a quote. 3 - the two-channel ccd controller boards are populated and ready to test. 4 - the CCD housings for MIKE + 4Kx4K and 10 invar boats are being made in the shop. 8) Other Business Next IMACS meeting: 10:15, 9/27/00, new conf. room. Progress reports included above. Meeting notes and action items: Clardy/Birk to pursue Skip Schaller regarding telescope guider interfaces. Sutin/Dressler to send a list of planned filters to the Magellan SAC for feedback.