 Tue Feb 23 19:07:43 2010, kiwamu and steve, Configuration, VAC, vent is completed 
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Quote:
Kiwamu and Steve have started venting the 40m vacuum envelope. |
 Fri Feb 26 15:32:13 2010, steve, Configuration, VAC, preparation for power outage: vacuum all off
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There is a planned power outage tomorrow, Saturday from 7am till midnight.
I vented all annulies and switched to ALL OFF configuration. The small region of the RGA is still under vacuum.
The vac-rack: gauges, c1vac1 and UPS turned off. |
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Mon Mar 1 11:21:50 2010, steve, Configuration, VAC, vacuum contoller is back to normal
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Quote:
There is a planned power outage tomorrow, Saturday from 7am till midnight. |
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Fri Mar 12 17:08:22 2010, steve, Configuration, VAC, bg-RGAscan at d18
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| RGA scan of rga-region only at day 18 This is the back ground of the rga with some calibration gas. |
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Fri Apr 16 17:46:54 2010, Koji, Update, VAC, Peeting mirrors aligned
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Steve and Koji
We aligned the peeping mirrors to look at the surface of the ITMs.
They had been misligned as we move the positions of the ITMs, but now they are fine. |
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Fri May 21 00:30:44 2010, Jenne, Update, VAC, TP3 fore pump is very loud
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[Jenne, Kiwamu, and Steve via phone]
Around 9:30pm, Kiwamu and I came back from dinner, and were getting ready to begin the beam scan measurements. I noticed that one of the
vacuum pumps was being very loud. Kiwamu noted that it is the fore pump for TP3's turbo, which he and Steve replaced in January (elog |
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Fri May 21 08:28:29 2010, steve, Configuration, VAC, TP3 turned off
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Quote:
[Jenne, Kiwamu, and Steve via phone] |
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Fri May 21 16:37:35 2010, steve, Configuration, VAC, tp3's drypump replaced
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| Bob replaced the tipseal in an other drypump and I swapped it in. TP3 turbo is running again, it's foreline pressure is 40 mTorr. The RGA is still off |
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Fri May 28 13:32:01 2010, alberto, kiwamu, Update, VAC, vacuum work
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We started a vacuum work in this morning. And still it's going on.
Although the last night the green team replaced a steering mirror by an 80% reflector on the PLS table, the beam axis to the MC looks fine. |
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Fri May 28 13:51:51 2010, Jenne, Update, VAC, vacuum work
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Quote:
We started a vacuum work in this morning. |
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Fri May 28 14:24:30 2010, Jenne, Update, VAC, vacuum work
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I just got off the phone with Alberto and Kiwamu, and I'm going to try to recalculate things based on their measurements of the distances between MC3
and SM1. It sounds like the CAD drawings we have aren't totally correct. I know that when we opened doors just before Christmas we measured the distances between the BS table and the ITM tables, but I don't think |
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Wed Jun 23 23:55:03 2010, Katharine, Sharmila, Rana, Steve and Kiwamu, Update, VAC, wiped the BS
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Some unused optics in the BS chamber were removed.
After that the beam splitter has been drag wiped. |
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Thu Jun 24 11:16:32 2010, Sharmila, Rana and Kiwamu, HowTo, VAC, Inspection of the BS (sorry, no sounds)
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Thu Jun 24 16:59:24 2010, josephb, Update, VAC, Finished restoring the access connector and door
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[Jenne, Kiwamu, Steve, Sharmila, Katherine, Joe]
We finished bolting the door on the new ITMX (old ITMY) and putting the access connector section back into place. We finished with torquing
all the bolts to 40 foot-pounds. |
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Tue Jun 29 17:10:49 2010, steve, rana, Update, VAC, slow pumpdown started
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The folding crane was fixed and tested this morning by the NNN rigging company. Pictures will be posted by Steve in the morning.
Afterwards, the ITM-east door was installed, jam-nuts checked. No high voltage was on for the in-vac PZTs.
The annulus spaces were roughed down to 350mTorr by Roughing Pump RP1. For this operation, we removed the low flow valve from the RP1 line. |
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Tue Jun 29 23:49:18 2010, steve, rana, Update, VAC, slow pumpdown started
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The pumpdown started at 4 PM (2300 UTC). At 10 PM, we (Jenne, Jan, and I) opened up the RV1 valve to full open. That's the second inflection point |
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Wed Jun 30 00:45:26 2010, rana, Update, VAC, slow pumpdown stopped for the night
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As per Steve's instructions, at 12:43 AM, I used the following steps to stop the pumpdown until the morning:
Close RV1 using the 'steering-wheel' wrench.
Close V3.
Turn OFF RP1.
Disconnect RP1 hose at
the plastic disconnect attached to the slow-start throttle valve.
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Wed Jun 30 15:24:04 2010, steve,kiwamu, Update, VAC, slow pumpdown copmlete
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Quote:
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Thu Jul 1 10:26:34 2010, steve, Configuration, VAC, pd68 at vacuum normal state
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Slow pump down _pd68 has reached the vacuum normal state. CC4_Rga region is pumped now. The RGA is still off.
Precondition to this pump down: &nb |
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Tue Jul 20 08:04:31 2010, steve, Configuration, VAC, slow vent has started
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The PSL shutter was closed. The beam path blocked two places. High voltage power supplies to IOO and OMC PZT were checked to be off. Oplevs are
off.
The south arm green cavity was misaligned yesterday |
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Tue Jul 20 23:52:36 2010, kiwamu, Update, VAC, update: slow vent has started
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The vent is still going on. At this moment the pressure inside of the chambers is about 630 Torr.
Koji and I have replaced the 2nd instrument grade compressed air cylinder by the 3rd cylinder around 9 pm.
So far the vent speed has been nicely kept at about 1 Torr / min. |
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Wed Jul 21 12:41:31 2010, kiwamu, Update, VAC, vent finished
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The vent has been finished successfully in this morning.
The vent was finished successfully this morning. |
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Thu Jul 22 08:07:27 2010, steve, Update, VAC, vent finished
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Quote:
The vent has been finished successfully in |
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Fri Jul 30 09:55:34 2010, steve, Configuration, VAC, slow pumpdown has started
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Bob and Steve closed BS chamber with the help of the manual Genie lift and the pump down started. The PSL shutter was closed and manual block was placed
in the beam path. High voltage power supplies were checked to be off.
Pumping speed ~ 1 Torr/min was achieved at 1/8 of a turn opened roughing valve RV1 |
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Fri Jul 30 17:54:55 2010, steve, HowTo, VAC, How to stop and start slow pumpdown
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Quote:
Bob and Steve closed BS chamber with the help of the manual Genie lift and the pump down started. The PSL shutter |
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Fri Jul 30 22:07:42 2010, Koji, HowTo, VAC, How to stop and start slow pumpdown
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Kiwamu and Koji
The rough pumping was stopped at 230mmTorr. We are going to resume the pumping tomorrow morning.
RV1 was closed with torque wheel.
V3 was closed from MEDM
RP3 wss stopped from MEDM
The quick |
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Sat Jul 31 10:12:05 2010, kiwamu, Update, VAC, Re: How to stop and start slow pumpdown
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| I resumed the pumping down. It started from 9:55 am. |
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Sat Jul 31 14:59:33 2010, kiwamu, Update, VAC, Re: How to stop and start slow pumpdown
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I stopped the pumping at 14:50 pm because I was going back home. I did the same procedure as Koji
wrote down (see here).
The P1 pressure reached 32 Torr. |
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Sat Jul 31 22:35:01 2010, Koji, Update, VAC, Vac-P1 still 1.2mtorr
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I resumed the pumping from 19:00.
Now the valve RV1 is full open. But the pumping is really slow as we are using only one RP.
After 3hrs of pumping, P1 reached 1.2mmtorr but still we need 2hrs of pumping... |
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Sun Aug 1 18:50:35 2010, Koji, Update, VAC, P1 = 0.48 torr
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I resumed the pumping today. Now the pressure is 0.48 torr. The pump was stopped.
Quote:
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Mon Aug 2 10:26:15 2010, steve, Configuration, VAC, very slow pumpdown completed
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Quote:
Bob and Steve closed BS chamber with the help of the manual Genie lift and the pump down started. The PSL shutter was |
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Mon Sep 27 08:59:50 2010, steve, Configuration, VAC, slow vent has started
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Blocked PSL output beam into IFO
Checked: HV at IOO & OMC are off, jam nuts in position,
Closed V1 and VM3, opened VV1 to N2 regulator |
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Tue Sep 28 00:07:45 2010, kiwamu, Configuration, VAC, Re: slow vent has started
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(Koji, Yuta, Kiwamu)
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Wed Sep 29 16:56:36 2010, yuta, Update, VAC, 2 doors opened
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(Steve, Koji, Joe, Kiwamu, Yuta)
Background:
The vent was started on Monday, and finished on Tuesday. |
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Mon Oct 4 19:48:00 2010, yuta, Update, VAC, several mirrors installed to ITMX/BS chamber
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(Koji, Kiwamu, Yuta)
Lots of progress for the optics placement in the vacuum chamber. |
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Tue Oct 5 17:39:21 2010, steve, Configuration, VAC, west access connector removed
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Kiwamu, Koji, Yutah, Rana, Jan and Steve
We removed the west access connector this afternoon. |
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Tue Oct 5 21:22:46 2010, yuta, Update, VAC, green beam reached PSL table
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YES
! We got the green light coming out from the OMC chamber to the PSL table ! |
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Mon Nov 15 16:09:44 2010, Jenne, Update, VAC, ETMX, ETMY, ITMY chambers opened
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[Steve, Jenne, Suresh, Koji]
The remaining test mass chambers have been opened, and have light doors in place. Now we can do all of the rest of the IFO alignment, and
then (hopefully) button up before the New Year. |
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Wed Dec 15 16:04:49 2010, steve, Configuration, VAC, vacuum valves found in default condition
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This condition is created when we run out of nitrogen that holds the valves in set positions. The Maglev and other turbos are still running in this configuration
so one has to pay attention that the foreline valves are open.
Reset error message on vacuum screen and opened V4 & V5 at 3pm today. |
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Tue Dec 21 16:20:09 2010, steve, Configuration, VAC, pumpdown has started
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Slow pumpdown of rebuilt IFO-mark4 started
at 3pm today.
We are at 680Torr at this minute with 1.5 Torr/min speed. |
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Tue Dec 21 16:34:42 2010, kiwamu, Summary, VAC, All the test masses have been wiped
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[Jenne and Kiwamu]
We wiped all the test masses with isopropyl alcohol.
They became apparently much cleaner.
(how to) |
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Wed Dec 22 15:47:22 2010, Koji, Update, VAC, Tank closing procedure
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[Jenne Kiwamu Joe Osamu Steve Koji]
Yesterday (21st), we closed the BSC and the four testmass chambers.
We splitted the team into three. |
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Wed Dec 22 17:24:50 2010, steve, Configuration, VAC, slow pumpdown at 12 hours
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We have reached 200 Torr at 12 hours of slow pumping speed. Kiwamu stopped the pumping for 11 hrs last night .and I restarted it this morning.
Now RV1 is fully open with butterfly valve in place and the second roughing pump RP3 was just turned on.
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Wed Dec 22 21:38:47 2010, kiwamu, Configuration, VAC, Re:slow pumpdown at 12 hours
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I stopped the pumping at 9:30 pm. Now we are at 29 torr.
Quote: from #4089
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Thu Dec 23 13:30:09 2010, steve, Configuration, VAC, slow pumpdown complete
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The pump down continued this morning by the removal of the butterfly valve. Two roughing pumps were used to reach 500 mTorr
The Maglev monitoring MEDM screen "Rotating" indicator is not
working. It is on all times. Please look at Maglev controller monitor for real information. |
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Tue Jan 11 11:39:45 2011, steve, Update, VAC, RGA is turned on
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Joe updated the rga procedure in the wiki and we turned on the filament. It will take a few days to reach thermal equilibrium.
TP2 dry fore pump was replaced at 910mTorr |
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Mon Jan 31 16:12:11 2011, steve, Update, VAC, Vertex crane upgrade shorth coming
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The upgrade is almost finished. I found that the passive latch lock is
not closing down all the way. It has about a 3/8" gap. See Atm. 1 & 2 |
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Fri Feb 11 09:27:03 2011, steve, Configuration, VAC, RGA scan
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The RGA scan is normal at day 52 of this pump down.
Light power BS 1064nm ~25mW, ETMX 532nm ~5mW |
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Wed Mar 9 17:29:11 2011, steve, Summary, VAC, single O-ring protection
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We have one single O-ring on the 40m vacuum envelope. It is on the OOC west side, facing the AP table. This O-ring has to be protected from the force
of this
door. There should be 3 shims ~120 degrees apart to carry the full load, so it is not the O-ring that is getting squashed. |
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Fri May 6 15:59:40 2011, steve, Update, VAC, TP3 fore pump replaced
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Dry fore pump of TP3 replaced by brand new Varian SH-110 at 1.1 Torr_75,208 hrs
The annuloses were closed off for 25 minutes. We are back to VACUUM NORMAL mode.
The TP3 fore line pressure dropped to 44 mTorr at 25 minutes in operation.......9.4mTorr at day 2 with full annulos load |