aLIGO LHO Logbook

LHO VE

chandra.romel@LIGO.ORG - posted 17:01, Thursday 28 December 2017 (39931)

Day's summary

IP 1,2,3 are being pumped via aux carts (valved out now). IP4 valve dead space was pumped out with loaner "cube" cart. GV5 annulus is set up to pump next week.

HAM 1 is on turbo powered through safety GFCI in case of a power failure.

All three turbos are valved into main volume and backed by local scrolls. QDP80s are OFF; water valved out.

Attempted to start leak checking but leak detector was not budging below 1.1e-8 Torr-L/s background. Postponing till next week.

Mark & Tyler worked on TMDS tables.

Dick G. was onsite for a while in the EE lab.

John Deer tech was on site for a while working on big green machine.

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LHO FMCS

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chandra.romel@LIGO.ORG - posted 10:21, Thursday 28 December 2017 - last comment - 06:23, Friday 29 December 2017(39929)

Site check

No issues to report.

Comments related to this report

chandra.romel@LIGO.ORG - 10:31, Thursday 28 December 2017 (39930)

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Except that the janitor closet next to unisex bathroom in OSB has a slow leak in faucet.

bubba.gateley@LIGO.ORG - 05:49, Friday 29 December 2017 (39932)

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The drip in the closet is condensate, not a faucet leaking.

chandra.romel@LIGO.ORG - 06:23, Friday 29 December 2017 (39933)

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Water drips from hose connected to faucet.

LHO VE

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chandra.romel@LIGO.ORG - posted 08:11, Thursday 28 December 2017 (39928)

Pump down curve

Corner pressure is 1e-5 Torr this morning with two turbos valved in (pressures at turbos: 3.8e-6 & 2.8e-6 Torr). XBM turbo is humming along at 4.9e-9 Torr; will valve in after leak checking today.

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LHO VE

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chandra.romel@LIGO.ORG - posted 17:09, Wednesday 27 December 2017 - last comment - 17:50, Wednesday 27 December 2017(39924)

Corner volume is on turbos....and overall day's summary

This afternoon Kyle and I valved in OMC turbo and YMB turbo. The XBM turbo is spun up but valved out and backed by its scroll. Kyle will lower pressure set points before he leaves today. Corner pressure is 10 mTorr.

HAM 1 turbo was valved in for a second but the power cord needs to be secured better so it was spun back down; will resume tomorrow. PT-100B CC gauge tripped and has been reset. Chamber pressure is 0.1 mTorr.

Aux turbo cart was moved from BSC 3 annulus to BSC 2 annulus.

Tyler and Mark are working on building three more TMDS tables.

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chandra.romel@LIGO.ORG - 17:28, Wednesday 27 December 2017 (39925)

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Terry was on site today working in sqeezer bay.

kyle.ryan@LIGO.ORG - 17:50, Wednesday 27 December 2017 (39926)

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Adjusted YBM and Vertex MTP safety valve threshold/setponts to their nominal values of 5.0 x 10-2 torr (foreline pressure at which MTPs isolate from VE).  

Also, I closed the IMC, OMC, YBM and XBM vent/purge valves now that we are on the Turbos and the "dead" volumes between the valve seals and the hose connection blank-offs have been pumped to a rough vacuum.  

Terry had coordinated with us today as to his arrival, work area and eventual departure.


1755 hrs. local -> Kyle leaving site now (unaware of anyone else on site at this time)

H1 PSL

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chandra.romel@LIGO.ORG - posted 16:55, Wednesday 27 December 2017 - last comment - 18:09, Wednesday 27 December 2017(39923)

PSL chiller topped off

I topped off the top PSL chiller with 150 mL of distilled water. The bottom chiller indicated OK status so I did not add any water to it.

Comments related to this report

corey.gray@LIGO.ORG - 18:09, Wednesday 27 December 2017 (39927)PSL

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This closes FAMIS #6555.

LHO FMCS

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chandra.romel@LIGO.ORG - posted 10:58, Wednesday 27 December 2017 (39922)

Site check report

[Bubba, Chandra]

Site check complete. Bubba found the MPR door ajar this morning which is my fault. While I checked that it was latched when I locked it yesterday, I didn't tug on it when I left last night. A good reminder that when exiting through that door at night pull on it to make sure it latches all the way.

Found CP7 Dewar head pressure a bit high: 25 psig

No leaks and no weird smells except for some expired meat balls in the OSB kitchen fridge.

I cleared off the X/Y 2-8 solar panels.

LHO VE

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chandra.romel@LIGO.ORG - posted 20:05, Tuesday 26 December 2017 - last comment - 08:26, Wednesday 27 December 2017(39908)

Corner pressure monitoring

PT120A: 280 Torr

PT100A: 308 Torr

Comments related to this report

kyle.ryan@LIGO.ORG - 20:30, Tuesday 26 December 2017 (39909)

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Changed my mind and returned to site 20 minutes after having left to valve-out (unattended) pumping from HAM1.  As such, PT100A pressure should remain unchanged tonight.

kyle.ryan@LIGO.ORG - 21:14, Tuesday 26 December 2017 (39910)

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2110 hrs. (PT120=227 torr, PT170=140 torr)

chandra.romel@LIGO.ORG - 21:58, Tuesday 26 December 2017 (39911)

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PT120A: 198 Torr

kyle.ryan@LIGO.ORG - 23:10, Tuesday 26 December 2017 (39912)

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2305 hrs. PT120 = 136 torr, PT170 = 70.4 torr

chandra.romel@LIGO.ORG - 00:03, Wednesday 27 December 2017 (39913)

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PT120A: 80.8 Torr

kyle.ryan@LIGO.ORG - 01:11, Wednesday 27 December 2017 (39914)

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0110 hrs. PT120A = 44.9 torr, PT170 = 34.0 torr

chandra.romel@LIGO.ORG - 02:04, Wednesday 27 December 2017 (39915)

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PT120a: 29 Torr

kyle.ryan@LIGO.ORG - 03:10, Wednesday 27 December 2017 (39916)

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0310 hrs. PT120A = 17.3 torr, PT170 = 15.8 torr

chandra.romel@LIGO.ORG - 03:58, Wednesday 27 December 2017 (39917)

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PT120a: 12 Torr

kyle.ryan@LIGO.ORG - 05:11, Wednesday 27 December 2017 (39918)

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0510 hrs. PT120A = 7.1 torr, PT170 = 7.0 torr

chandra.romel@LIGO.ORG - 06:04, Wednesday 27 December 2017 (39919)

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PT120a: 4.95 Torr

kyle.ryan@LIGO.ORG - 07:04, Wednesday 27 December 2017 (39920)

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0705 hrs.  PT120A = 3.3 torr, PT170 = 3.4 torr

chandra.romel@LIGO.ORG - 08:26, Wednesday 27 December 2017 (39921)

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Corner is pumping down nicely! PT-120A reading 1.98 Torr.

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