1 / 14

MAS History 2001-2003

Texas 2001 (“Half-MASTER”) 4&5/01 5/01-7/01 Recoat all foreoptics Refocused all optics New port 3 dewar Grounding Issues BB and ER2 control cross cabled CLAMS-CAMEX4 – 7/9-9/26/01 10/01-6/02 Port 2 dewar serviced Grounding isolation RF shielding PCVA eliminated SCSI and disk issues.

eryk
Download Presentation

MAS History 2001-2003

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Texas 2001 (“Half-MASTER”) 4&5/01 5/01-7/01 Recoat all foreoptics Refocused all optics New port 3 dewar Grounding Issues BB and ER2 control cross cabled CLAMS-CAMEX4 – 7/9-9/26/01 10/01-6/02 Port 2 dewar serviced Grounding isolation RF shielding PCVA eliminated SCSI and disk issues MAS History 2001-2003

  2. Crystal / Dryden7/1-8/12/02 8/02-10/02 Fix ch 45 in Port 4 - 8/02 Vibration testing - 10/21 Port 3 fails - 10/23/02 Port 4 vacuum accidentally dumped during window replacement Texas 11/19-12/12/02 12/13/02- 1/03 2nd Dichoric & port 4 mirror replaced Port dewar de-watered at EG&G Judson Full spectral alignment Port 4 grating adjusted More ground and RF isolation Thorpex 2/1-4/10/03 CO2 clean implemented MAS History 2001-2003(cont.)

  3. Port 3 Trunion Failure • Found during post vibration test spectral check • Support screw found to have worn alignment hole • Dewar base swapped with spare dewar ---- worn

  4. Port 4 Problems • Lost considerable response • Loss of signal reduced BB spread and increased noise • Vacuum Bakeout by EG&G eliminated the problem

  5. Vibration Testing • Oct 18-21 • 3 axis to 0.1G sin • Port 3 trunion found loose afterwards • Minor electrical interference in setup • No measurable effect any other port

  6. Port 3 Mirror Port 2 mirror Failing Sprectrometer Optics(Post-THORPEX)

  7. BB Spikes reduced but not gone Time Spikes – need gps time Missing Scan lines – SCSI Burp Descending Scanlines Engineering subsystems erratic Need to implement effective disk house preflight pressure check Resolve Hemisphere Picoamp meter scaling issue Current Engineering Issues

  8. PCVAs eliminated Coherent noise greatly reduced Temporary fix to RFI implemented Hard Disk failures linked to pressurization loss Resolved Issues

  9. Optics replacement: Port 2 lens, Ports 1-3 mirrors, Port 1 grating, Port 2 orings Other Tasks: port 2 lens defogger, RF shielding upgrade, explore tare improvement Cold BB testing Dry air environment for calibrations New GPS and Roll/Synchro chips MAS Summer ’03 Maintenance Tasks(System down July 30 – Sept. 30)

  10. Summer Schedule

  11. MAS Optics

  12. 1st Dichroic - $2,650 ea - 4 2nd Dichroic - $3,650 ea - 4 3rd Dichroic - $2,550 ea - 4 1st Grating - $2,400 ea - 1 2nd Grating - $2,400 ea - 1 3rd Grating - $2,400 ea - 1 4th Grating - $2,400 ea - 1 Prt 2 window - sapphire - 0 Prt 3 window - $3,375 ea - 3 Prt 4 window - #3,335 ea - 4 Folding Mirror - $735 ea - 6 Pfund rework - $5,400 - 1 Scan Mirror – in process Primary Parabolic - 2 Prt 2/3 array - $1,300ea – 3? Spare port 2/3 dewar - TBD Spare port 4 LVF – 0 Spare port 4 dewar - $? - 0 Lens 1  $32,000 - 0 Lens 2  Reworked $13,000 Lens 3  $27,000 - 0 Lens 4  $30,000 - 0 New Optical Spares(with costs)

  13. Procuring Spare arrays port 2/3 Soon to start building spare port 2/3 Judson has expressed interest in building another port 4 Pavel has found another LVF vendor Dewars

  14. QuadADC: (many; shared with MASTER) DDX-B: 2 TCIO - none – (obsolete card) Main CPU (Adastra): 1- (obsolete) BB Monitor – obsolete- no solid spares Preamps – 1 card only for port 2/3 Most other components adequate Electronic Spares

More Related