Betsy Weaver, Keita Kawabe, Vern Sandberg
Jul 28, 2016
E1600229-v1, WHAM6 Vent Plan
APPROVED work to be done in order of importance:
· Assess HAM6 volume for contamination and investigation of possible beam corruption. Take photographs.
· Remove and inspect HAM6 OMC glass breadboard for damage, possibly swap with 3rd breadboard unit and realign
· Install new High Quantum Efficiency PDs on OMC breadboard
· Replace VE gauge on top of HAM6
DCC Vent Documents referenced in this plan:
· M1600165 Mobile Cleanroom Relocation Procedure
· T1600145 Cleanroom Move Checklist
· E1100742 Payload layout update for HAM6
· D0901822 HAM6 Top Level Chamber Assembly
· E1201035 aLIGO Chamber Entry & Exit Procedures
· M1100039 Hanford Checklist - HAM Door Removal
· M1300464 Procedure for preparing aLIGO IFO for pumpdown
· E1500214 OMC Black Glass Assembly Procedure
· E1300201 OMC Assembly Procedure
· D0900295 OMC SUS Assembly
· D1201439 OMC Breadboard Layout
· D1201515 OMC Transport Fixture
· T1200525 How To Use the OMC Transport Fixture
· T080117 Removal of OMC Breadboard
· E1600013 Handling Procedure for High QE Photodiodes
Note – The in-chamber OMC team will consist of Koji, Corey, Jeff B, Betsy, Keita, while the VE and Seismic teams will be performing VE and Seismic line items.
SCHEDULE
FEW DAYS PRIOR TO VENT
1) Move newly placed L4C’s that are on the LVEA floor, in the way of vent equipment
2) Turn cleanrooms on around HAM6 where applicable
3) First and second cleaning of HAM6 chamber area, door flange, and cleanrooms, etc.
4) Stage supplies and equipment
5) Contamination control kit
6) 3rd OMC Glass Breadboard unit
7) 2nd OMC transport fixture
8) Clean spare ISC OM mirrors “just-in-case”
9) ISC tool pan
10)SUS tool pan
11)Septum viewport cover D1200448
12)Confirm dust monitor is working
13)Lock HEPI
14)Confirm purge air capabilities of HAM6
15)Transition to LASER SAFE
TUE AUG 2, 2016
16)Confirm the PSL shutter is closed, then mark and move ISCT6 out of the way to facilitate door removal. NOTE: DOCUMENT CABLING CONNECTIONS BETWEEN ISCT6 and HAM6.
17)Soft close GV5 and GV7 (backup safety)
18)Turn on purge air, if not done already
19)Vent HAM6
20)Remove NORTH and SOUTH CHAMBER DOORS – Review and follow M1100039 “ Hanford checklist – HAM Door Removal”
21)Entry chamber checklist items: Pick up floor CC wafers, inspect. Take particle counter measurements and record. (Jeff B) Notes:
22)Lock ISI (Team SEI)
23) Install Septum Window Cover
24) Inspect table components, specifically beam dumps, for damage
25) Start removal of necessary OMC black glass shroud pieces and stow on work table outside of chamber. (Betsy, Koji)
a. E1500214 OMC Black Glass Assy Procedure
26)Remove ISI table masses that interfere with OMC work.
27) Install new High QE PDs on new OMC Breadboard Assy D1201439-03
a. E1300201 Section 6.10 Replacement of photodiodes
b. T1200525 Handling procedure for High QE PDs
28)Put First Contact on new OMC Assy D1201439-03 optical surfaces/PDs for cleaning.
WED AUG 3, 2016
29) Take daily particle measurements and record:
30)Continue removal of necessary OMC black glass shroud pieces and stow on work table outside of chamber.
a. E1500214 OMC Black Glass Assy Procedure
31) Remove in-chamber OMC Breadboard Assy D1201439-02. Place in transport fixture and stow on work table outside of chamber. Although the removal process itself is not discussed in detail, it’s a reverse process of installation, so follow through the contents of the sections in the following order:
a. T080117 Section 24 Suspending the masses
b. T080117 Section 23.2 Attaching lower wires
c. T080117 Section 21 Installing the metal bench
d. T1200525 Using the OMC transport fixture
32) Inspect old OMC Breadboard D1201439-02. If damaged, replace with Breadboard D1201439-03, following sections in this order:
a. Remove First Contact from new OMC Assy D1201439-03 optical surfaces/PDs
b. T080117 Section 31 Replacing the metal bench
c. T080117 Section 21 Installing the metal bench
d. T080117 Section 23.2 Attaching lower wires
e. T080117 Section 24 Suspending the masses
THUR AUG 4, 2016
33) Take daily particle measurements and record:
34)Continue with OMC reinstall work.
35)Balance OMC suspension
a. E1300201 OMC Assembly Procedure
36)Transition to LASER HAZARD
37)Align OMC with PSL beam
38)Align or confirm alignment of HAM6 optical paths
FRI ~TUE AUG 5~9, 2016
39) Take daily particle measurements and record:
40)Continue OMC and HAM6 optical alignment
41)Check Beam Diverter functionality
42)Check Tip Tilt TFs
43)Check for cable grounding
44) Rebalance ISI / transfer functions
45) Remove Septum Window Cover
46) Chamber closeout – perform applicable exit checklist tasks E1201035.
47) Take particle count measurements and record:
48)Replace HAM6 Doors
49) Begin pump down
50)VE swap gauge on top of chamber
51) Replace ISCT6 and reconnect all cables/light pipes. Verify shutter functionality.