v1.0 2015April 02
Plan for HAM6 Vent, April 2-8, 2015
Approved work to be done:
DCC Vent Documents referenced in this plan:
Additional Documentation:
The HAM6 door to be removed is the "East" door.
In-chamber Work Plan:
Preparation
- Open East door of HAM6
- ISI locking
- Align the beam on the AS_C QPD
- Align the beam on the OMC QPDs
- Confirm the beam is on the WFS QPDs
OM1 mirror replacement
- OM1 mirror replacement
New optic- Align the spots on OMC QPDs/WFS QPDs with OM1 and OM2
Usual CLASS B Allen wrenches
First contact removal kit: UHV N2 & ionizing blow kit
If removal of the optics does not work:
=> CG: Tip Tilt Spare
S/N 28 is in a bag on the bottom shelf of rack in the Optics Lab, if needed.
- Check if the BOSEM values are OK or not.
If not, we need to retune the BOSEM positions (debiasing)- Check or align the AS_AIR path
A hex box wrench for BOSEM adjustment
- Align AS_C QPD
At LLO, pitching up of the OM1 suspension was observed. This case, the balancing screws needs to be replaced. Therefore it’s better to prepare
CLASS A #8-32 set/cap screws/nutsInserting a 90:10 BS in OMCR
- Check if the small mirrors at the OMC REFL have no clipping
- Insert the 90:10 BS in the path.
The optic on the mount
CG: 2” Mount for new BS & post
We definitely do not have 2" Mirror Mounts. We have plenty of 2" lens holders. We have varying posts, so we should confirm what works with lens holder.
=> This is OK
As Lisa states, we have a bag of these (E1500009) in the Optics Lab. They still need to be cleaned.
ISC Dog Clamps:- Dump the reflection with the beam dump
There are bags of both type of ISC-specific dog clamps on the shelf in Optics Lab.
The beam dump on the mount- Align the OMC REFL AIR path to recover the alignment
CG: V-Holder Beam Dump Assembly
We have these parts in the Optics Lab.
- Align the OMC REFL QPDs
QPD cable strain relief
- Attach QPD cable strain relief to AS_C/OMCR_A/OMCR_B QPDs
3x D1101910
3x D1101911
3x SHCS 1/4-20 x1/2” non plated
6x SHCS 8-32 x 1/2” non plated
CG: I have both Peek parts & we also must have c&B-ed the hardware for them, because two bags of bolts were with the parts.
I have put all (4) bags in the H1 Spare QPD tote under the optics Table.Lubrication of the beam diverter
- Apply Krytox on BD
Krytox: Permission received from Dennis Coyne, application tips from Matt H./Rich A. => Some information will be provided in a couple of days)
Counterweight for Beam Diverter
Need to see what type of screw can be used for the hole on the Beam Diverter and see what we have. We should be OK.
HAM6 Power Budget
- Measure optical power (OMC Unlocked) OM1 incident
OM1 transmission- Lock OMC
OM1 BS incident
OM1 BS transmission vs AS_C sum OM1 BS reflection
AS_AIR (window transmission) OM2 incident
OM3 incident
OMC incident
OMC Reflection (Unlocked)
OMCR BS90/10 incident
OMCR BS90/10 reflection
OMCR BS90/10 transission
OMCR BS50/50 transission
OMCR BS50/50 reflection
OMCR QPDA incident (vs OMCR QPDA digital reading) OMCR QPDB incident (vs OMCR QPDB digital reading) OMCR AIR (window transmission)
(OMC incident)
OMC transmission (DCPDA/DCPDB analog/digital reading)
OMC REFL
OMC leakage trans?
For locking the OMC, we need to turn stop the purge air, and probably stop/lower the HEPA fans.Exit procedure
- Take photos of the table => Send them to Eddie - Ground loop check
- ISI unlock
The following may take place on Wednesday.
- Hang door
- OM1 TF check
- Prepare for Door closing and Pumpdown
The transitions to and from "Laser Safe" need to be reviewed with Peter King. The is the possibility of additional transition cycles during the in-chamber time period. There may be independent cycling of the CO2 (10um) lasers. These need to be worked out in more detail.
The pump down is at the time and discretion of the Vacuum crew.
Reminder: File work permits for all door openings and closings. [Vacuum Crew]
For Reference:
Strain Relief Assy:
I have both Peek parts & we also must have c&B-ed the hardware for them, because two bags of bolts were with the parts. I have put all (4) bags in the H1 Spare QPD tote under the optics Table.
Krytox
I have a tube of it in my desk (center drawer). John was asking about waivers from Dennis for this (so we should look to see if those are around; perhaps in some Heintze documentation?).
Tip Tilt Spare
S/N 28 is in a bag on the bottom shelf of rack in the Optics Lab, if needed.
2" Mount for new BS & post
We definitely do not have 2" Mirror Mounts. We have plenty of 2" lens holders. We have varying posts, so we should confirm what works with lens holder.
V-Holder Beam Dump Assembly
We have these parts in the Optics Lab.
90% BS
As Lisa states, we have a bag of these (E1500009) in the Optics Lab. One still needs to be cleaned for next week.
ISC Dog Clamps
There are bags of both type of ISC-specific dog clamps on the shelf in Optics Lab.
Counterweight for Beam Diverter
I need to see what type of screw can be used for the hole on the Beam Diverter and see what we have. We should be OK.
OM1 Mirror
An OM1 mirror (E1100056) should be found and cleaned by Corey.