IMACS progress report no. 38 B. Bigelow 5 June 2001 Project Status Currently scheduled tasks: Status: a) DSS drafting (Cleary) IP b) DSS fabrication (Kowal, Castillo) IP c) Filter server assy. (2) (Asa) IP d) Field lens mechanics fab (Martinez & Turek) on schedule e) Calibration system mech. des. (Hare) IP f) Mask server integration (Asa) done g) Collimator mechanics fab (M&T) due 6/15 h) Coll. opto-mech assembly (Bigelow) late start (June) i) Long camera fabrication (Martinez & Turek) on sched. j) Center Field Guider mechanics fab (Storts) late k) CF Guider assy (Asa) delayed by CFG fab l) Principal Guider Camera fab (Storts) delayed by CFG fab m) Science Array controller fab (Burley) 95% compl. n) Short Camera mech. design (Bigelow) on sched. o) Filter procurement (Sutin) on sched. p) Grism procurement (Sutin) on sched. q) Motion control (MC) electr. design (Carr) late (90% compl.) r) MC fab. (Asa) late (50% compl.) s) Control software design (Birk) on sched. Project events: Latest construction images can be seen on the IMACS web site: http://www.ociw.edu/instrumentation/imacs Optics (Sutin) 1) All the long camera elements are finished polishing and here at OCIW. 2) TORC is generating (shaping) the material for the short camera spheres. 3) We have a contract from REOSC for the short camera aspheres. Other than some confusion over wording to be worked out, we are ready to go with the purchase order. 4) Optovac sent material for our last element, S02. It has been shipped to TORC. A backup S02 lens made from cheesy Russian material is being shaped at United Lens now. 5) Spectrum says that their ion source works wonderfully, and they should soon give us some data on real coating runs. Spectrum has also given us a quote for coating all of the remaining collimator and long camera lenses. The SESO coatings that were an alternative to Spectrum TF have very large absorption, and appear to be no good. 6) All of the guider optics are here. Electronics (Asa/Carr) Asa: Accomplished in May: Shutter: Testing of the detent magnets showed that the positions of the linear motors needs adjustment to align the cogging of the motors with the detent positions. Measurements were made to determine these positions. Filter Servers: All parts have been anodized. Filter server one has been completely assembled. Filter server two has been partially assembled. We are short some minor purchased parts and some minor in house manufactured parts. Slit Mask Server: Testing has been completed by Christoph. The stage encoder will be sent off for repair. Dewar Focus Limits and Home Switches: A preliminary model has been drawn to add these switches. Documentation: I have been working with Dave Carr to include the as-built details in the schematics. To accomplish in June: Electronic Chassis: Chassis #1 will be reworked and completed. It includes control electronics for the filter servers, the slit mask server, and the center field guide camera. Testing will commence by the end of the month. Chassis #2 will be started. Chassis #2 contains electronics for the Shack Hartman guide camera, the Principle guide camera, and a yet to be determined mechanism. Filter server #2: Assembly will be completed. Testing of all electronic systems will be completed. Both filter servers will be stored in some manner until the instrument structure arrives. Dewar Focus Limits and Home Switches: Time willing, the drawings will be finalized. Software (Birk/Clardy) Birk: Done in May: - finished slit-mask server testing -> ok - started writing quick-look tool Planned for June: - test 2nd filter-server - test shutter (vertial mounting + timing) - start guider control software - start with science-array readout software - continue with quick-look tool Clardy: Over the past weeks, I have obtained from Sutin a zero-th order approximation of the optical model. This will compute the result in the detector plane of a photon passing through any given point in the image plane. This approximation includes only the focal lengths of the collimator and camera, along with the basic grating or grism quantities. Higher order effects of the spherical nature of the lenses are not included, so the spectra in this approximation are straight lines, and differ from the actual images by many (order 50) pixels. However, the basic method of finding the optical transform, and the units and angles involved are working. I also have a test program to determine that the results from the coded transform program will match those of the optical design programs. Further meetings with the Astronomers (program users) regarding how the mask generation should interpret their input, and what features are needed or desired will be taking place. These meetings will continue until a definition exists of precisely what the slit mask generation program will and will not do. Detector Systems (Thomson/Burley) Guider Cameras Jorge has continued with board assembly, we now have 20 board sets. He also has started on integrating the 5 CCD's we have on hand onto the header boards. Next he will revise previously built boards to bring all systems to a common design. This past month he has spent some 1.5 weeks working on the Magellan guider. We plan to have 5 more cameras assembled and tested by the end of June depending on how much Guider work is planned. Science Cameras. We took our first images with a science grade CCD and the new electronics. Some work on the temperature control and thermal connection remains to be finished, as well as refurbishing the pump (replacement turbo pump and new oil-free scroll pump). The revised PCI card was submitted for fabrication. Early in June we hope to test a CCD at operating temperature. Goals for June include some software fixes (implement the summing well, continuous wipe, and input clamp), as well as tests to see if the Overflow Drain voltage needs to be independently controlled. The clock driver card will be submitted for fab sometime in the next couple of days, final revisions of the other cards await the cold tests which will happen over the next two weeks. Jorge will move over to making new PCI cards when the guider cameras are finished. Mechanics (Bigelow/Bond/Hare) Bigelow: In May: 1) Completed coll. cells drafting, let fab to M & T 2) Complete alignment tooling and parts order for coll and LCAM (partial) 3) Completed detail design of SCAM lens cells, and SCAM front barrel 4) Received additional slit mask cutting samples from Convergent/Prima For June: 1) Start assembly of collimator lens elements C02 and C03 with cells 2) Receive LCAM mechanics from Martinez & Turek, prepare for assembly 3) Continue design of short camera mechanics 4) Progress baffle designs for collimator and long camera Bond: May was spent getting the disperser server drawings finished up with Richard. As well, a drawing package was put together for external fabrication of some of the disperser tilt mechanism components. An FEA analysis is also under way of several of the disperser tilt mechanism components. For June, I plan to finish the FEA analysis and to finish all of the purchasing for the disperser server system. Hare: Current Work * Redesign of shutter parts complete. Drafting revisions underway. * Revised shutter solid model. Updated model to reflect as builts. * Continuing with revisions of guide camera solid models and part drawings, as necessary. * Updating revision control documentation for shutter and guide cameras. * Let contract for the fabrication of the Field Lens Ring. Expected delivery date is June 29th. Future Work * Shutter rework and testing. * Continue revisions to guide camera solid models and part drawings as needed. * Examine tooling setup for Field Lens from coating process (Cleveland Crystal) * Resume design work of the Calibration Unit. * Review design of Disperser Server and oversee fabrication. * Continuing work with IMACS structure solid model. Fabrication (Kowal/Storts/Castillo/Ramirez) Kowal: May's Report: 1) Jerson Castillo has been hired as our new machinist. Jerson comes to us from 3M Unitek in Monrovia. He has over seven years machining experience primarily in the medical component industry. 2) Filter Servers 1 & 2 have been anodized and (partially) assembled. 3) Disperser Server Update: a) Grating Flexures are currently being run on the Haas by Jerson and are past the 1st operation. b) Pilar has fabricated both trunion plates and is currently working on the drive tension plates. c) The G.T.M. base plate and removable pillar drawing packages have been sent out for quotation on fabrication and welding to two job shops. Kap Manufacturing has quoted us $5,680 with a six-week delivery time. Martinez and Turek have not submitted their bid yet but it should be in soon. 4) Guide Camera Update: a) Slit mask support and lenslet array ring is completed. b) Rest of work is in progress and Robert expects to be finished by June 15th Expectation's for June: 1) Completion of trunion & grating flexure or DSS. (Jerson) 2) Completion of Center Field guider (Robert) 3) Programming, ordering and preparation for DSS Carousel (Vince) 8) Other Business Next meeting: 10:15, 6/20/2001