IMACS progress report no. 39 B. Bigelow 9 July 2001 Project Status Currently scheduled tasks: Status: a) DSS drafting (Cleary) IP (late) b) DSS fabrication (Kowal, Castillo) IP (late) c) Filter server assy. (2) (Asa) IP d) Field lens mechanics fab (Martinez & Turek) on schedule e) Calibration system mech. des. (Hare) IP f) Collimator mechanics fab (M&T) late g) Coll. opto-mech assembly (Bigelow) late start (July) h) Long camera fabrication (Martinez & Turek) late i) Center Field Guider mechanics fab (Storts) done j) CF Guider assy (Asa) done k) Principal Guider Camera fab (Storts) started l) Science Array controller fab (Burley) 95% compl. m) Short Camera mech. design (Bigelow) done n) Short Camera drafting (Cleary) 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: Tim Bond left OCIW and the IMACS project in early June. Tim provided the mechanical designs for the filter servers and the disperser server. We expect him back for a short time in August for the assembly of the disperser server. We wish him well in his future adventures! Latest construction images can be seen on the IMACS web site: http://www.ociw.edu/instrumentation/imacs Optics (Sutin) 1) Short camera at TORC: S02 is 99% done. Since this is a CaF2 element, the other 1% could take months. S09 is in polishing. S05 and S07 are in grinding. S03 has not been started. 2) Two sets of material for the two aspheric short camera elements have been shipped to REOSC. 3) The Russian S02 backup lens is here, and appears at first glance to be a single crystal. We should consider selling the Schott S02 backup. 4) Spectrum is doing sample runs of our coating, and will send us data as soon as the have some. The preliminary design is better than what Coherent proposed, and Spectrum believes that they can produce such a coating. 5) Cleveland Crystal has made all the dipping fixtures for the field lens, and is now calibrating the sol-gel bath to give the correct minimum-reflection wavelength. 6) Grisms and filters: no progess. I want to order the Gunn filters this month, and design and order the substrate material for the 150 and 200 lines/mm grisms. Electronics (Asa/Carr) Asa: Accomplished in June: Electronics: Chassis #1 has been completed and rung out. It includes control electronics for the filter servers, the slit mask server, and the center field guide camera. Details are being worked out and filled in to the documentation regarding cables, chassis, racks, and heat loads. Filter server #2: Assembly continues. Parts are on order. Shutter: The couplings have been reworked to reduce friction and maximize holding forces at the open and close positions. Guide Cameras: Initial assembly of the Center Field Guide Camera has started. Several minor design changes have been realized and initiated. To Accomplish in July: Shutter: Final testing WILL be completed this month. Filter Server 2: Assembly, testing and packing for storage will be completed. Dewar Focus Limits and Home Switches: Time willing, the drawings will be finalized. Electronics: 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. Software (Birk/Clardy) Birk: During June I mostly worked on data acquistion software. This includes the Camera-GUI (user interface) and lower level software for hardware control (DSP) and data I/O. I also worked a little bit on the quick-look tool and wrote a simple Magellan telescope control system (TCS) simulator. The TCS simulator allows testing of TCP/IP commands from IMACS to the Magellan control computer. Testing of the 2nd filter server, shutter and the center-field guider have moved to July. Clardy: Progress continues on the Slit Mask programming. With the exception of the optical model data, the data structures for mask generation have been designed. Coding continues on all the subroutines needed to check the object list for conflicts between spectra. When the final optical model is known, the design of how to store and use the optical data will be completed. Detector Systems (Thomson/Burley) Guider cameras ============== * sent three cameras to Chile, with interface boards * Jorge completed the 20 sets of boards * Jorge assembled 5 CCDs plus board sets into five more cameras * Jorge assembled 5 of the revised PCI boards, still to be tested * there are still some problems getting the EPLD programming software to run on our lab PC with WinNT Science cameras =============== * tested the first SITe CCD at operating temp, increased the gain of the preamp to x20 * there is some work to be done on noise-reduction and optimising the signal processing * implemented continuous-wipe and summing well operting modes * sent the revised clock_driver and power boards to be made * designed an extender card for testing * investigated the procedures for changing the gas in the lab cryotiger system from PT-13 to PT-30 gas mixture. The maintenance kit that we bought from APD ($4000) did not come with instructions for the procedure to change the gas, and APD will not give them to us (they don't want to be liable if we don't do it right, or if the instructions are not clear). The options are to have their maintenance tech come to OCIW and show us how to do it, or to ship the unit back to the factory. Either way will cost about ~$1500. Mechanics (Bigelow/Hare) Bigelow: In June: 1) Design of short camera mechanics completed, ready for drafting 2) Material samples ordered for optics baffles 3) Alignment tooling design completed for long camera 4) Tooling assembled and tested for collimator, ready for assembly 5) Slit mask cutting testing continued with Convergent/Prima For July: 1) Complete assembly of collimator lens elements C02 and C03 with cells 2) Receive LCAM mechanics from Martinez & Turek, prepare for assembly 3) Progress baffle designs for collimator and cameras 4) Complete thermal analysis for IMACS enclosure design 5) Complete design of guider/field-lens/mask-server interface to struct. Hare: Current Work * Rework for Shutter is complete and reassembly is underway. Testing can begin when reassembled, expected in the second week of July. * Continuing with revisions of guide camera solid models and part drawings, as necessary. * Mechanical and electrical assembly of the Center Field Guider has begun. Completion of assembly and testing is expected to take place throughout July. * A drawing package and associated solid models for the Principal Guider Camera is complete. Fabrication of this assembly will begin this month. * Expected delivery date Field Lens Ring Assembly has been pushed back to July 9th. * Review of the Disperser Server design and drawing package continues. Future Work * Shutter assembly and testing. * Continue revisions to guide camera solid models and part drawings as needed. * Assembly and testing of the Center Field Guider Camera. * Begin fabrication of the Principal Guider Camera. * Examine tooling setup for Field Lens from coating process (Cleveland Crystal) * Resume design work of the Calibration Unit. * Review design of Disperser Server and continue work on the solid models. * Order outstanding parts for disperser server subassemblies that are currently in fabrication. Fabrication (Kowal/Storts/Castillo/Ramirez) Kowal: June Report: 1) Seven grating flexure are complete. (Jerson) 2) Four trunions are near complete. (Jerson) 3) Modified shutter blocks completed. (Jerson) 4) Small parts for G.T.M. are finished (Pilar) 5) Center field guider is complete. (Robert) Expectation's for July: 1) Programming, ordering and preparation for Principal Guider. (Vince) 2) Ordering of material and programming for new and improved tilt mechanism base plate and pillars. (Vince) 8) Other Business Next meeting: 10:15, 7/31/2001