DEIMOS

Introduction

DEIMOS is not on sky between October 25th and January 5th. Besides, it is desirable to pump the DEIMOS detector vessel, LN2 can, and cold finger volumes for two weeks because they were pumped for only a few days last time we warm filled the instrument.

Therefore, the baseline plan is:

1. Stop the LN2 fills a few days before the power shutdown.

2. Power down the instrument completely the day before the power shutdown

3. Power up the instrument after the power shutdown

4. Connect external vacuum pumps

5. Pump for 2 weeks

6. Warm fill and checkout for operations

Procedure Before power down

• Sat, Nov 2: Las LN2 fill. Update SIAS to indicate that no LN2 fills will be needed starting on Sun, Nov 3. Ensure the HV channel on both ion pumps is turned OFF by the end of the warm up to prevent the autostart function on the ion pump controllers from starting the ion pumps when the power to the ion pump controllers returns.

• Tue, Nov 5: Power down instrument using the PDU interface available on any DEIMOS VNC pulldown menu: DEIMOS Engineering → DEIMOS power control GUI. The following sequence is a guideline:

  1. LN2 can ion pump controller

  2. Detector vessel ion pump controller

  3. Barrel D-Link network switch

  4. 10B2 media converter

  5. Galil 1500 #1

  6. Galil 1500 #2

  7. Piezo controller

  8. HP data logger

  9. Barrel Lantronix TS

  10. Science CCD controller power supply

  11. FCS CCD controller

  12. CCD shutter controller

  13. Barrel Lantronix TS

  14. Autofill PLC

  15. Galil rotator controller

  16. Rotator interlock reset (not sure if it will keep beeping)

  17. Over-temperature interlock reset (not sure if it will keep beeping)

  18. Cradle Lantronix TS

  19. D-Link DE-808TC

  20. Science CCD VME crate (K2 Computer Room)

  21. FCS CCD VME crate (K2 Computer Room)

  22. vm-deimos (K2 Computer Room?)

  23. roto (K2 Computer Room)

  24. polo (K2 Computer Room)

  25. keamano (K2 Computer Room)

Procedure during power down

None because the instrument will be warm.

Procedure to bring back the system

Power up CCD VME crates and instrument hosts in the computer room in the following order:

1. keamano (make sure traffic daemon is running before proceeding further)

2. polo

3. roto

4. vm-deimos

5. Science CCD VME crate

6. FCS CCD VME crate

Power up instrument sub-systems as follows:

1. D-Link DE-809TC

2. Cradle Lantronix TS

3. Galil rotator controller

4. Autofill PLC

5. Rotator interlock reset (may need to toggle power to silence it)

6. Over-temperature interlock reset (may need to toggle power to silence it)

7. Barrel Lantronix TS

8. 10B2 media converter

9. Barrel D-Link network switch

10. CCD shutter controller

11. Galil 1500 #1

12. Galil 1500 #2

13. Piezo controller

14. HP data logger

15. DO NOT power up the ion pump controllers unless their HV channel was off when they were powered down.