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2641. Fiber Positioning System for the Sloan Digital Sky Survey
Sloan Digital Sky Survey Telescope Technical Note 19911019 Siriluk Limmongkol , Russell Owen , Charles Hull and Walter Siegmund . A 600 fiber positioning system is being developed for the Digital Sky Survey project of the Astrophysical Research Consortium. ... A paper similar in content to this note is published as "Fiber Positioning System for the Digital Sky Survey", S. Limmongkol, R. Owen, W. A. Siegmund, and C. L. Hull, in Fiber Optics in Astronomy II, ed. Peter Gray, 1992, p. 127. ...
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Ссылки http://www.apo.nmsu.edu/Telescopes/SDSS/eng.papers/19911019_FiberPositioning/19911019.html -- 25.7 Кб -- 16.06.1999
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2642. Full-scale plug-plate drilling tests I
... Plate measurements . ... The plug-plates of SDSS project are responsible for locating the optical-fiber plugs spatially and for defining the plug tilts normal to the fiber axis. ... Approximately 700 holes will be drilled in each plate. ... The hole axes are drilled vertical. ... The hole tilt as a function of radius is compared to the ideal tilt from the optical design (kent005) and to the finite element model of the plug-plate in its drilling fixture (drl42) is shown in Figure 5 and Figure 6 . ...
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Ссылки http://www.apo.nmsu.edu/Telescopes/SDSS/eng.papers/19941206_fsDrillingI/19941206.html -- 20.9 Кб -- 16.06.1999
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2643. lowlitbbaf
Lower Light Baffle Installation: April 15, 1999 . Due to popular demand, here are images of the recently installed lower light baffle. The light quality is a little low due to the enclosure over the telescope. ... The lower light baffle is shown as the dark, 8-sided ring around the mirror, mounted on the white mirror cell, and just inside the blue cell mount. The pleated sides of the baffle are black and butt up against the mirror cell. The baffle extends into the wind screen. ...
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Ссылки http://www.apo.nmsu.edu/Site/SDSS.progress/990415lowlitbaf/lowlitbaf.htm -- 2.7 Кб -- 15.06.1999
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2644. 2.5m Telescope Procedure
Procedure for Opening, Closing, and Moving . ... This document contains procedures for opening and closing the SDSS 2.5m telescope enclosure, and for preparing to move the telescope. ... Check the whiteboards in the Ops building and the 2 levels in the telescope enclosure for the current status of the telescope and any other notes that may pertain to opening the enclosure. ... NOTE: The interlocks for the hatch doors may be bypassed, so the building will move with the hatch doors open.) ...
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Ссылки http://www.apo.nmsu.edu/Telescopes/SDSS/openproc1.htm -- 15.2 Кб -- 28.05.1999
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2645. Fiber Feed for the SDSS Spectrograph
... A 640 fiber feed for a pair of moderate resolution spectrographs is being constructed for the Sloan Digital Sky Survey. The spectrograph slits, optical fibers and plug-plates are mounted together in removable cartridges. ... These are mass-terminated in v-groove blocks at the spectrograph slit. ... Each plug-plate cartridge includes two spectrograph fiber slit assemblies; these are attached with a flexible linkage so that the two slits and the plug-plate can be independently aligned. ...
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Ссылки http://www.apo.nmsu.edu/Telescopes/SDSS/eng.papers/19940311_FiberFeed/19940311.html -- 17.4 Кб -- 26.05.1999
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2646. Sloan Digital Sky Survey Telescope Enclosure: Flow Visualization
Sloan Digital Sky Survey Telescope Technical Note 19940310 Charles H. Comfort, Jr., ... The telescope enclosure for the Sloan Digital Sky Survey 2.5 meter telescope is the first roll-off design used on a telescope of this size. ... The SDSS 2.5-m telescope enclosure. ... A paper similar in content to this note is published as "Sloan Digital Sky Survey telescope enclosure: flow visualization", C. H. Comfort, Mark Matheson, S. Limmongkol, W. A. Siegmund, Proc. of S.P.I.E., 2199, 1994, p.1074. ...
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Ссылки http://www.apo.nmsu.edu/Telescopes/SDSS/eng.papers/19940310_EnclosureFlow/19940310.html -- 18.1 Кб -- 26.05.1999
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2647. spectrographic optical design
... Optical Prescription . ... Radius=625. 000 Source at infinity s c s n a2 a4 a6 k 1 -8.889e-005 0.00 -1.00028 0.000e + 000 0.000e + 000 3.81e-022 -1.285e+ 000 2 -1.390e-004 -3644.44 1.00028 0.000e + 000 0.000e + 000 1.79e-019 -1.197e+001 3 0.000e + 000 3619.89 1.46080 2.321e-005 -1.173e-010 -7.87e-017 0.000e + 000 4 0.000e + 000 12.00 1.00028 0.000e + 000 0.000e + 000 0.00e+ 000 0.000e + ...
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Ссылки http://www.apo.nmsu.edu/Telescopes/SDSS/eng.papers/19961022_SpecOpticalDesign/19961022.html -- 11.3 Кб -- 18.05.1999
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2648. guider
Spectro1 and Guider Electronics Installation: April 27, 1999 . Bob Nichol and Matt Newcomb (both CMU), as well as Ellyne Kinney, Jeff Hayes, Jon Brinkmann, and Norm Blythe (all APO) worked on matching spectro1 with its guider electronics. ... Jon Brinkmann and French Leger muscle the central optics into spectro1. ... Ellyne Kinney plugs plate cartridge for guider test. Ellyne Kinney and Norm Blythe work on the plug plate for the guider test. ...
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Ссылки http://www.apo.nmsu.edu/Site/SDSS.progress/990427guider/guider.htm -- 3.8 Кб -- 30.04.1999
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2649. spectro1
Spectro1 and Corrector Installation: April 30, 1999 . ... French Leger and Steve Bastian (both with FNL), as well as Jon Brinkmann/APO and Glenn Federwitz and Carlos Gonzalez (both FNL), pitched in for the task at hand. ... As the telescope is tipped up to zenith, the Spectro1 eases past the cable mast and is ever so close to the wind screen mounts. ... French, Carlos Gonzalez (center), and Glen Federwitz (right) talk over the movement of the telescope to zenith, as well as that pesky wind screen. ...
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Ссылки http://www.apo.nmsu.edu/Site/SDSS.progress/990430speccam/spectro1.htm -- 5.4 Кб -- 30.04.1999
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2650. corrector
Plate Cartridge Modification and Mounting: April 30, 1999 . After the spectrograph corrector was mounted, French Leger, with Steve Bastian and Jon Brinkmann, begin to modify the plate cartridge for a guide pin to the corrector and to mount the cartridge on the telescope. ... The plate cartridge is moved to the telescope and French begins to ease the slit heads on the cartridge to the opening in the bottom of the spectrograph (see the hole above the black slithead box?) ...
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Ссылки http://www.apo.nmsu.edu/Site/SDSS.progress/990430cartridge/cartridge.htm -- 5.8 Кб -- 30.04.1999
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2651. corrector
Spectrograph Corrector Installation: April 30, 1999 . This is a big day: with spectro1 mounted, install the corrector and hang the plate cartridge. ... The throat of the telescope (above) is exposed so that the corrector can be mounted. The corrector sits on the Lindy cart mounted to the engineering camera. A plate covers the lens. ... Guider electrnoics are attached to the spectro1 with white duct tape. ... Two views of spectro1, corrector, and plate cartridge mounted to telescope. ...
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Ссылки http://www.apo.nmsu.edu/Site/SDSS.progress/990430speccorr/corrector.htm -- 3.3 Кб -- 30.04.1999
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2652. mix
Mounting/Balancing Spectrograph; Update on Lower Light Baffle: April 26, 1999 . Steve Bastian, French Leger (both FNL) and Jon Brinkmann/APO succeeded in their endeavors to mount #1 spectrograph, plus the counterweight, prior to being forced off the pier by wind. ... Jon and French move the spectro1 onto the instrument cart to move to camera. The red pin sets are ready to fit over the stainless steel mounts to secure spectro1 to the rotator. ... Exterior views of the lower light baffle . ...
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Ссылки http://www.apo.nmsu.edu/Site/SDSS.progress/990426/mix.htm -- 3.9 Кб -- 27.04.1999
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2653. Fiber Positioning System Performance
... Plate drilling . ... Hole locations . ... Approximately 670 holes are drilled in each plate. ... Once the plug-plate is assembled and installed on the telescope, guide stars imaged onto coherent fiber-optic bundles are used to determine the errors in telescope pointing, image scale and rotator angle. ... As described in the introduction, the holes are drilled tilted with respect to the normal to the plate surface. The tilt of holes were measured on six plates drilled prior to plate uw0111. ...
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Ссылки http://www.apo.nmsu.edu/Telescopes/SDSS/eng.papers/19980127_FiberPositioning/19980127.html -- 19.5 Кб -- 16.04.1999
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2654. spectros
Moving Spectrograph #1 and #2: March 25, 1999 . ... The plan is to move #1 to the telescope and conduct a preliminary fitting. The CCD cameras are positioned on the lab bench for future installation. ... Our slaves for the day are (l-r) Jon Brinkmann/APO, French Leger/FNL, Slim Baxter/APO, Jon Davis/APO, and Steve Bastian/FNL, who are preparing the lifting straps on #1. ... Steve Bastian prepares the spectrograph cart to move the instrument to the rotator. ...
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Ссылки http://www.apo.nmsu.edu/Site/SDSS.progress/990325spectros/spectros.htm -- 4.7 Кб -- 31.03.1999
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2655. whitbaf.html
. Installation of Light Baffle: March 25, 1999 . A quick look at the installed light baffle covering the secondary support and mirror. Our local upholsterer, Harper's Upholstery, has really come through on these light baffle solutions. French Leger and Steve Bastian accomplished the work on 3/23/99. Photos taken by Gretchen Van Doren/APO.
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Ссылки http://www.apo.nmsu.edu/Site/SDSS.progress/990325whitbaf/whitbaf.htm -- 2.2 Кб -- 31.03.1999
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2656. sgs summary
... Guider functions . ... Guide Sensor Performance . ... Guide Sensor Sky Coverage/ Star Availability . Guide Star Selection Criteria . ... Guide fiber organization and reach at plug plate . ... Plug plate holes for guide stars are identical to those for science FO . ... FOV for each of 9 guide stars is 7.4 arcsec dia. (0.45 mm FO, Sumitomo IGN-05/10) . ... Selected guide stars must have no neighbor stars within TBD (5 arcsec) radius that have a brightness within TBD (5 mag.) of guide stars . ...
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Ссылки http://www.apo.nmsu.edu/Telescopes/SDSS/eng.papers/19990324_guider/19990324.html -- 19.2 Кб -- 26.03.1999
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2657. http://www.apo.nmsu.edu/Telescopes/SDSS/eng.papers/19990212_AstigCor/19990212.html
... For NO forces on the mirror, all the regulators are set at a pressure of 100 units; the REFERENCE pressure, which is applied to the other side of the double-acting air cylinders, is set to 88.3 (this is because the air cylinders generate different forces for a given pressure on the top and bottom because of the area occluded by the cylinder shaft on the top of the piston, and the calibration of the reference channel is identical to the others. ... back to top . ... Install the pushrods. ...
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Ссылки http://www.apo.nmsu.edu/Telescopes/SDSS/eng.papers/19990212_AstigCor/19990212.html -- 19.2 Кб -- 24.03.1999
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2658. http://www.apo.nmsu.edu/Telescopes/SDSS/eng.papers/19990317_M1_INST_REM/19990317.html
... Mirror hard points, Galil channels A-D, are at nominal positions for observations . Lateral link drives, Galil channels E & F, are at nominal positions for observations . Install telescope-wind baffle turnbuckles . ... Remove wind baffle (see wind baffle rem. proc.) . ... Remove remaining 2 pair of wind baffle counterweights . ... Move wind baffle + telescope to zenith "bird bath", install pin, apply telescope altitude brake, depress emergency stop button and disable wind baffle drive . ...
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Ссылки http://www.apo.nmsu.edu/Telescopes/SDSS/eng.papers/19990317_M1_INST_REM/19990317.html -- 7.6 Кб -- 17.03.1999
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2659. SDSS Telescope
... Larry Fiscelli/UC, French Leger and Steve Bastian (both FNL) (and a seamster in Alamogordo) fabricated and installed the light baffle on Tuesday and finished it up on Wednesday--the weather was favorable, albeit windy. The completed installation, as well as the cover over the secondary optics system. ... L-R)Matt Newcomb, Adrian Pope, Bob Nichol, and Aronne Merrelli (all from Carnegie Mellon) take a break to admire the light baffle during their work on the spectrograph. ...
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Ссылки http://www.apo.nmsu.edu/Site/SDSS.progress/990310litbaf/litbaf.html -- 2.2 Кб -- 12.03.1999
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2660. SDSS Telescope
. Caption above photo . Ron Miksa, Don Goloskie (not pictured), Carl Lindenmeyer, John Korienek, and Jerry Zimmerman (all FNL) complete work on the plugging station. Their hands weren't always in their pockets! . Photos taken by Gretchen Van Doren/APO.
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Ссылки http://www.apo.nmsu.edu/Site/SDSS.progress/990302mapsta2/mapsta2.html -- 1.5 Кб -- 12.03.1999
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