ETMX BSC9 - Vent Master = Betsy Weaver
https://dcc.ligo.org/E1500265
APPROVED work to be done in order of importance:
Remove charge from ETMx (Travis, Danny, Gary, Betsy, Kate, Calum, Tester Arnaud)
Install VE ports to enable mounting of TMDS and new pumps (Gerardo, Kyle)
Add Krytox to beam diverters on TMS, additional QPD strain relief (Corey, Keita)
Fix clipping on TMSx (Corey, Keita)
Remove most bias from ETMx (Betsy, Travis or Danny, Gary)
Swap ESD feedthru, time permitting (Richard, Betsy)
Check ETMx PUM UL coil/cable seating, attempt to fix excess noise
as per Bug 929, alog 13047 (Betsy, Travis or Danny, Gary)
DCC Vent Documents referenced in this plan:
- E1201035-v17, "aLIGO Chamber Entry & Exit Procedures" https://dcc.ligo.org/LIGO-E1201035
- M1100039, "Hanford Checklist - HAM Door Removal" https://dcc.ligo.org/LIGO-M1100039
- M1300464-v4, "Procedure for preparing aLIGO IFO for pumpdown" https://dcc.ligo.org/LIGO-M1300464
Additional Documentation:
- The ECR approving the use of Krytox LVP is E1400353
- The Beam Diverter assembly is described in E1100686-v3
- The ETM/ERM Gap discharge procedure is described in T1500101
SCHEDULE
FRI-MON early morning permitting, June 12-15, 2015
1) Turn cleanrooms on
2) Clean area, door flange, and cleanroom
3) Start staging of supplies and equipment
4) Confirm dust monitor is working
MON, June 15, 2015
5) Transition to LASER SAFE
6) CDS: Control systems need to be up and running through vent – confirm that normal TUES CDS maint does not interfere with controls.
7) Confirm purge air is on
8) Close gate valves
9) Vent BSC9
10) Remove door – Review and follow M1100039 “ Hanford checklist – HAM Door Removal”
11) Entry chamber checklist items: Pick up floor CC wafers. Take particle counter measurements and record:
12) Inspect optic – Calum, Kate, Travis, Betsy, Danny, Gary
13) Transition to LASER HAZARD
14) Start TMS work
QPD strain relief, rebalance TMS and check alignment
Krytox on BD
Possibly fix clipping, recheck alignment
Take particle counter measurements and record:
TUES, June 16, 2015
15) Finish TMS work. Take particle counter measurements:
16) Transition to LASER SAFE
17) VE work – installation of 2 ports
WED, June 17, 2015
18) Debias ETMx via watching pointing on oplev, note removing ~300 counts will be good enough. Check TFs to ensure full suspension after complete. Take particle counter measurements:
19) Check cabling to ETMx L2 UL AOSEM – lots of sensor noise
20) Swap and reterminate ESD feedthru (maybe – will skip if not enough time to complete)
THUR, June 18, 2015
21) Discharge ETMx, noting details of measurements for alog, as per procedure T1500101. Inspect all EQ stops at TM stage for proximity. Take particle counter measurements throughout and record:
22) SUS ETMx TF test
23) Chamber closeout – note, a truncated exit chamber checklist will be executed due to risk of recontamination of charge.
24) Put door on, start pump down.
FRI, June 19, 2015
25) Perform ESD/OL charge measurements.