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ID Date Author Type Categoryup Subject
  9011   Wed Aug 14 08:24:20 2013 SteveUpdateVACpumpdown at day 8

 

 

Attachment 1: pd76md8.png
pd76md8.png
  9017   Fri Aug 16 09:35:18 2013 SteveUpdateVACVacuum Normal state recognition is back

Quote:

Quote:

Quote:

Quote:

Apparently all of the ION pump valves (VIPEE, VIPEV, VIPSV, VIPSE) opened, which vented the main volume up to 62 mTorr.  All of the annulus valves (VAVSE, VAVSV, VAVBS, VAVEV, VAVEE) also appeared to be open.  One of the roughing pumps was also turned on.  Other stuff we didn't notice?  Bad. 

 Several of the suspensions were kicked pretty hard (600+ mV on some sensors) as a result of this quick vent wind.  All of the suspensions are damped now, so it doesn't look like we suffered any damage to suspensions.

CLOSE CALL on the vacuum system:

Jamie and I disabled V1, VM2 and VM3 gate valves by disconnecting their 120V solenoid actuator before the swap of the VME crate.

The vacuum controller unexpectedly lost control over the swap as Jamie described it. We were lucky not to do any damage! The ion pumps were cold and clean. We have not used them for years so their outgassing possibly  accumulated to reach ~10-50 Torr

I disconnected_ immobilized and labelled the following 6 valves:  the 4 large ion pump gate valves and VC1,  VC2  of the cryo pump. Note: the valves on the cryo pump stayed closed. It is crucial that a warm cry pump is kept closed!

This will not allow the same thing to happen again and protect the IFO from warm cryo contamination.

The down side of this that the computer can not identify vacuum states any longer.

This vacuum system badly needs an upgrade. I will make a list.

 While I was doing the oil change of the roughing pumps I accidentally touched the 24 V adjustment knob on the power supply.

All valve closed to default condition. I realized that the current indicator was red at 0.2A  and the voltage fluctuated from 3-13V

Increased current limiter to 0.4A and set voltage to 24V     I think this was the reason for the caos of valve switching during the VME swap.

 

 Based on the facts above I reconnected VC1 and VC2 valves.  State recognition is working.  Ion pumps are turned off and their gate valves are disabled. 

We learned that even with closed off gate valves while at atmosphere  ion pumps outgass hydrocarbons at 1e-6 Torr level.  We have not used them for this reason in the passed 9 rears.

 

I need help with implementing V1 interlock triggered by Maglev failure signal  and-or P2 pressure.

MEDM screen agrees with vacuum rack signs.

Attachment 1: VacuumNormal.png
VacuumNormal.png
Attachment 2: vacValvesDisabled.jpg
vacValvesDisabled.jpg
  9029   Mon Aug 19 11:12:54 2013 SteveUpdateVACRGA scan at day 13

 

 

Attachment 1: rgaScan13d.png
rgaScan13d.png
  9084   Wed Aug 28 11:23:41 2013 SteveUpdateVACcrane repair sheduled

Quote:

 1, Vacuum envelope grounds must be connected all times!  After door removal reconnect both cables immediately.

 2, The crane folding had a new issue of getting cut as picture shows.

 3, Too much oplev light is scattered. This picture was taken just before we put on the heavy door.

 4, We were unprepared to hold the smaller side chamber door 29" od of the IOC

 5, Silicon bronze 1/2-13 nuts for chamber doors will be replaced. They are not smooth turning.

 

 Fred Goldbar of KoneCranes will come 7:30am Wednesday, September 4 to look at this issue.

It is changed to Thursday morning.

  9085   Wed Aug 28 15:41:42 2013 SteveUpdateVACRGA scan at day 23

 Valve configuration: Vacuum Normal

pd76-m-d23

 

Attachment 1: pd75md23.png
pd75md23.png
  9111   Thu Sep 5 10:47:58 2013 SteveUpdateVACvertex crane folding issue

 

 [Fred Goldbar, Mike Gerfen, Dennis Coyne and Steve]

We inspected the hinge, 1.25" cross pin and I-beams. It is hard to explain what is  causing the folding I-beam corner to jam against the main I-beam.

To limit the motion of the folding I-beam  cross pin bushing will be added. This will take a week to complete.

 

 

 

 

 

Attachment 1: 5mmLess.jpg
5mmLess.jpg
  9115   Fri Sep 6 09:27:10 2013 SteveUpdateVAC31 days after pumpdown

Quote:

 Valve configuration: Vacuum Normal

 

 

Attachment 1: day31vac.png
day31vac.png
  9117   Mon Sep 9 15:33:06 2013 SteveUpdateVACvertex crane repair is scheduled

Quote:

 

 [Fred Goldbar, Mike Gerfen, Dennis Coyne and Steve]

We inspected the hinge, 1.25" cross pin and I-beams. It is hard to explain what is  causing the folding I-beam corner to jam against the main I-beam.

To limit the motion of the folding I-beam  cross pin bushing will be added. This will take a week to complete.

 

 

 

 

 

 KoneCrane contact John McDaniel (562) 903 - 1371,

Wednesday, September 18,  folding I-beam will be removed.  KoneCrane will start working at 7:30am and they should be out by 12:30pm

 Friday,  September 20, reinstalling machined hinge on the I-beam. Same timing schedule as Wednesday.

  9119   Tue Sep 10 09:18:22 2013 SteveUpdateVACdry pump is getting loud

 

 TP3 foreline's dry pump is getting noisier and noisier.  Turbo TP3 is pumping on the annulos. The foreline pressure is 7.2 mTorr and it is not degrading. It was swapped in March 5, 2013

The seal is very good, but the bearing is dying.

 

 

 

  9120   Tue Sep 10 15:43:01 2013 SteveUpdateVACTP3' dry pump is replaced

Quote:

 

 TP3 foreline's dry pump is getting noisier and noisier.  Turbo TP3 is pumping on the annulos. The foreline pressure is 7.2 mTorr and it is not degrading. It was swapped in March 5, 2013

The seal is very good, but the bearing is dying.

 

 

 

 The drypump is replaced at 95,781 hrs on TP3 controller time. The foreline pressure is 30 mTorr and dropping.

 It is 13 mTorr after 17 hours of pumping.

  9129   Mon Sep 16 10:57:11 2013 SteveUpdateVACRGA scan at day 41

Quote:

 Valve configuration: Vacuum Normal

 

 Finally we reached 1.0e-5 Torr, cc1 (h) at day 41. There must be a leak or cold cathode gauge is not reading correctly. The gauge is new. It should not take this long.

All chamber annulos pressures are normal.

Attachment 1: pd76m41dRGA.png
pd76m41dRGA.png
Attachment 2: pd76m41d.png
pd76m41d.png
  9139   Wed Sep 18 14:57:12 2013 SteveUpdateVACvertex crane folding arm removed

 The folding beam removed as shown. Two man supporting it while I hammering it out. Pin was dry and it gulled into supporting hinges.

The rotating hinge will be machined and bushing will be added with Zerk fitting or similar. This will allow lubrication in the future.

 see elog #9111

Attachment 1: manPower.jpg
manPower.jpg
Attachment 2: rotatingHinge.jpg
rotatingHinge.jpg
Attachment 3: supportingHinge.jpg
supportingHinge.jpg
Attachment 4: gullingPin.jpg
gullingPin.jpg
  9146   Fri Sep 20 16:37:30 2013 SteveUpdateVACvertex crane folding arm is back on

Quote:

 The folding beam removed as shown. Two man supporting it while I hammering it out. Pin was dry and it gulled into supporting hinges.

The rotating hinge will be machined and bushing will be added with Zerk fitting or similar. This will allow lubrication in the future.

 see elog #9111

Atm1,  The folding arm is back on with 0.1" misalignment at no load in the trolly's way. The other side of the I beam is 0.02" higher than the main beam.. New bushing and pin were greased up  with Krytox before installation.

The axial Zerk 1/8" pipe in the pin upper end can not take any fitting. There is no room. It is taped off.

This gap comes down to ~ 1/16" at fully extended arm with 225 lbs load at the end of it.

The present plan is to grind down the  the misalignment of 0.1"  for a slow-loaded trolly.

Steve Baker of Konacranes will be back to grind down this ridge and load test at 500 lbs on Tuesday,  OCT  1, 2013

 

 

 

Attachment 1: bushingBottom.jpg
bushingBottom.jpg
Attachment 2: foldingI.jpg
foldingI.jpg
Attachment 3: noLoadGap.jpg
noLoadGap.jpg
Attachment 4: trollyway.jpg
trollyway.jpg
Attachment 5: trollySee.jpg
trollySee.jpg
  9173   Mon Sep 30 08:53:22 2013 SteveUpdateVACvertex crane repair schedule has changed

Quote:

Quote:

 The folding beam removed as shown. Two man supporting it while I hammering it out. Pin was dry and it gulled into supporting hinges.

The rotating hinge will be machined and bushing will be added with Zerk fitting or similar. This will allow lubrication in the future.

 see elog #9111

Atm1,  The folding arm is back on with 0.1" misalignment at no load in the trolly's way. The other side of the I beam is 0.02" higher than the main beam.. New bushing and pin were greased up  with Krytox before installation.

The axial Zerk 1/8" pipe in the pin upper end can not take any fitting. There is no room. It is taped off.

This gap comes down to ~ 1/16" at fully extended arm with 225 lbs load at the end of it.

The present plan is to grind down the  the misalignment of 0.1"  for a slow-loaded trolly.

Steve Baker of Konecranes will be back to grind down this ridge and load test at 500 lbs on Tuesday,  OCT  1, 2013

 

 

 

 Konecranes rescheduled the completion of the Vertex crane to Wednesday, Oct. 2

  9185   Wed Oct 2 14:25:39 2013 SteveUpdateVACvertex crane is still out of order

 

The smoke alarms were turned off and surrounding areas were covered with plastic.

The folding I-beam was ground down to be in level with the main beam.

Load bearing cable moved into correct position. New folding spring installed.

Crane calibration was done at 500 lbs at the end of the fully extended jib.

Than we realized that the rotating wheel limit switch stopped working.

This means that the crane is still out of order.

 

Attachment 1: grindingIbeam.jpg
grindingIbeam.jpg
Attachment 2: cableMoved.jpg
cableMoved.jpg
Attachment 3: 500lbs@end.jpg
500lbs@end.jpg
  9223   Wed Oct 9 11:48:10 2013 SteveUpdateVACRGA scan at day 65

 

 Valve configuration: Vacuum Normal

Attachment 1: scanRGApd76m65d.png
scanRGApd76m65d.png
Attachment 2: pd76m65d.png
pd76m65d.png
  9359   Thu Nov 7 11:19:04 2013 SteveUpdateVACcrane work POSTPONED to Monday

Quote:

 

The smoke alarms were turned off and surrounding areas were covered with plastic.

The folding I-beam was ground down to be in level with the main beam.

Load bearing cable moved into correct position. New folding spring installed.

Crane calibration was done at 500 lbs at the end of the fully extended jib.

Than we realized that the rotating wheel limit switch stopped working.

This means that the crane is still out of order.

 

 New limit switch will be installed tomorrow morning

Konecranes postponed installation Friday morning Nov. 8

Friday 5pm : Konacranes promising to be here 8am Monday, Nov 11

It was rescheduled on Tuesday again for Wednesday, Nov 13

  9372   Wed Nov 13 08:46:03 2013 SteveUpdateVACvertex crane repair completed

nullQuote:

 

The smoke alarms were turned off and surrounding areas were covered with plastic.

The folding I-beam was ground down to be in level with the main beam.

Load bearing cable moved into correct position. New folding spring installed.

Crane calibration was done at 500 lbs at the end of the fully extended jib.

Than we realized that the rotating wheel limit switch stopped working.

This means that the crane is still out of order.

 

New limit switch installed and tested. The crane is back in full operational mode. Two spare limit switches on hand.

  9424   Fri Nov 22 16:32:08 2013 SteveUpdateVACRGA scan at day 108

Quote:

 

 Valve configuration: Vacuum Normal

 

Attachment 1: RGAscanVacNormal108d.png
RGAscanVacNormal108d.png
Attachment 2: day108.png
day108.png
Attachment 3: pd76m110d.png
pd76m110d.png
  9467   Fri Dec 13 16:34:20 2013 SteveUpdateVACPS will be replaced next week

Quote:

Instrument rack power supplies checked and labeled at present loads.

The vacuum rack Sorensen is running HOT! Their is only 0.3A load at 24V There is plenty of space around it.

It is alarming to me because all vacuum valve positions are controlled by this 24V

 The temperature went down to room temp with temporary fan in the back. Voltage and current are stable.

Regardless, it will be replaced early next week.

Attachment 1: hotPSvacRack.jpg
hotPSvacRack.jpg
Attachment 2: fan1X8.jpg
fan1X8.jpg
  9506   Fri Dec 20 20:04:01 2013 SteveUpdateVACpower supply replaced with a short vent

Quote:

Quote:

Instrument rack power supplies checked and labeled at present loads.

The vacuum rack Sorensen is running HOT! Their is only 0.3A load at 24V There is plenty of space around it.

It is alarming to me because all vacuum valve positions are controlled by this 24V

 The temperature went down to room temp with temporary fan in the back. Voltage and current are stable.

Regardless, it will be replaced early next week.

Koji, Steve

 It was a bad experience again with our vacuum system.  The valves went crazy as we rebooted the computer. This was required for the swap in of a good 24V power supply.

The IFO was vented to 27 Torr through the annuloses, VA6, V7, Maglev,VM2 and VM1 (VC2 was open too)

I just opened the PSL shutter after a 4 hours pumpdown.

Condition: annuloses are not pumped, the IFO and the RGA are pumped as Atm2 shows

I will be here tomorrow morning to switch over to vacuum normal. 

More details later

 

 

Attachment 1: 4hrPumpdown.png
4hrPumpdown.png
Attachment 2: pumpdownAfterHickup.png
pumpdownAfterHickup.png
Attachment 3: PSpumpdown.png
PSpumpdown.png
  9508   Fri Dec 20 23:00:41 2013 KojiUpdateVACpower supply replaced with a short vent

I'm leaving the 40m now. IFO is aligned. Everything look good.

- The main volume P1=5e-4, CC1=1.4e-5 is still pumped by TP1 and TP2

- RGA P4<0e-4, CC4 2.1e-7, is pumped by TP3

- The annuluses are isolated.

- RP1/2/3 are off.

  9510   Sat Dec 21 10:53:35 2013 SteveUpdateVACpower supply replaced with a short vent-pumpdown completed

The recovery- pumpdown reached valve configuration  vacuum normal at 20 hours, cc1 7.7e-6 Torr

Lesson learned: turn all pumps off, close all valves before you reboot ! like you would prepare for AC power shut down.

 

Attachment 1: 20hrsVacNormal.png
20hrsVacNormal.png
  9514   Thu Jan 2 10:50:24 2014 SteveUpdateVAC vacuum monitor is still blank

 The date is correct on this monitor.

Last stored RGA scan data Dec 20, 2013

IFO pressure at CC1 5.8e-6 Torr

Valve configuration: Vacuum Normal, confirmable only by manual checking of position indicators and pressure gauge controllers  readouts

 

Attachment 1: Help.png
Help.png
Attachment 2: vacation.png
vacation.png
Attachment 3: 20131220lastRGAscan.png
20131220lastRGAscan.png
  9515   Thu Jan 2 13:35:06 2014 KojiUpdateVAC vacuum monitor is still blank

We probably need to restart the machine, but I didn't want to touch c1vac1 and c1vac2. 

  9516   Fri Jan 3 11:18:41 2014 SteveSummaryVACpower supply replaced with a short vent

Quote:

Quote:

 

 The temperature went down to room temp with temporary fan in the back. Voltage and current are stable.

Regardless, it will be replaced early next week.

Koji, Steve

 It was a bad experience again with our vacuum system.  The valves went crazy as we rebooted the computer. This was required for the swap in of a good 24V power supply.

The IFO was vented to 27 Torr through the annuloses, VA6, V7, Maglev,VM2 and VM1 (VC2 was open too)

I just opened the PSL shutter after a 4 hours pumpdown.

Condition: annuloses are not pumped, the IFO and the RGA are pumped as Atm2 shows

I will be here tomorrow morning to switch over to vacuum normal. 

More details later

 

 

 Events of the power supply swap:

1, Tested 24V DC ps from Todd

2, Closed V1, VM1 and all annulos valves to create safety net for the reboot. Turbo pumps left on running.

3, Turned computer off

4, Swap power supplies and turned it on

5, Turning the power on of c1vac2 created caos switching of valves. This resulted in a air vent as shown below.

6, VM1 was jammed and it was unable to close. The IOO beam shutter closed and the IFO was venting with air for a few minutes. Maglev did an emergency shut down. TP2's V4 and TP3' V5 closed. RP1 and RP3                           roughing         pumps turned on, their hose was not connected as usual. The RGA shut down to protect itself.

7, Closed annulos valves, stoped the vent at P1 27 torr as the vacuum control was  manually recovered

8, The Maglev and the annuloses were roughed out 500 mtorr . The Maglev was restarted.

9, The IFO pump down followed std procedure from 27 torr. VM1 was moving again as the pressure differential was removed from it.

 

 Remember: next time at atm .....rough down the cryo volume from 27 torr !

Attachment 1: rebootVENT.png
rebootVENT.png
  9550   Mon Jan 13 16:50:55 2014 SteveUpdateVACMaglev controller needs service

Quote:

 The date is correct on this monitor.

Last stored RGA scan data Dec 20, 2013

IFO pressure at CC1 5.8e-6 Torr

Valve configuration: Vacuum Normal, confirmable only by manual checking of position indicators and pressure gauge controllers  readouts

 

 The Osaka TG390MCAB maglev turbo pump's controller TC010M has passed the 40,000 hrs of operation. This triggered the " alarm" LED  warning light to come on. 

It is normal maintenance.  Maglev TP-1 is running perfectly.  Osaka will send us a loaner-controller that we can use while they do the std maintenance.

I'm thinking of ~ February to do this.

  9562   Tue Jan 21 17:26:59 2014 JenneSummaryVACRebooted RGA computer and reset RGA settings

[Jenne, Steve]

Steve noticed that the RGA was not logging data and that not all the correct connection lights were on, and he wasn't able to run the "RGAset.py" script (in ...../scripts/RGA/) that sets up the proper parameters. 

I looked, and the computer was not mounting the file system.  I did a remote shutdown, then Steve went in and pushed the power button to turn the machine back on.  After it booted up, it was able to talk to the file system, so I started ..../scripts/RGA/RGAset.py .  The first 2 times I ran the script, it reported errors, but the 3rd time, it reported no communication errors.  So, now that the computer can again talk to the file system, it should be able to run the cronjob, which is set to take data at 4am every day.  Steve will check in the morning to confirm that the data is there.  (The last data that's logged is 22Dec2013, 4am, which is right around when Koji reported and then fixed the file system).

 

 

  9565   Wed Jan 22 15:24:11 2014 SteveSummaryVACRga scan after reboot

Quote:

[Jenne, Steve]

Steve noticed that the RGA was not logging data and that not all the correct connection lights were on, and he wasn't able to run the "RGAset.py" script (in ...../scripts/RGA/) that sets up the proper parameters. 

I looked, and the computer was not mounting the file system.  I did a remote shutdown, then Steve went in and pushed the power button to turn the machine back on.  After it booted up, it was able to talk to the file system, so I started ..../scripts/RGA/RGAset.py .  The first 2 times I ran the script, it reported errors, but the 3rd time, it reported no communication errors.  So, now that the computer can again talk to the file system, it should be able to run the cronjob, which is set to take data at 4am every day.  Steve will check in the morning to confirm that the data is there.  (The last data that's logged is 22Dec2013, 4am, which is right around when Koji reported and then fixed the file system).

 

 

 We are venting tomorrow. This give us an opportunity to fix sick vacuum controller computer. Jamie volunteered.

Remember to rough down cryo and ion pump volumes. Their pressure can be at 1 Torr range after years of accumulated outgassing.  Without total valve controls it is dangerous to have these air pockets. Some of their  gate valves can be leaking and that would explane the slower pumpdown speed. 

 

Attachment 1: Rgascan169dwarmingup.png
Rgascan169dwarmingup.png
Attachment 2: BlankMedmMustBeFixed.png
BlankMedmMustBeFixed.png
  9570   Thu Jan 23 08:04:04 2014 SteveUpdateVACvacuum control screen is blank

 

There is BLANK VacControl_BAK.adl screen only. 

I can move a valve by disconnecting it's  solenoid power if it's position is normally open.

I will close V1 and check computer cable connections and move on with manual - hand disconnect ea valve to be moved into the right position for vent. Valve positions will be confirmed by looking manual indicators on valves.

Attachment 1: pd76m170d2dRgaOn.png
pd76m170d2dRgaOn.png
  9571   Thu Jan 23 13:23:10 2014 SteveUpdateVAC40m IFO is at atmosphere

Quote:

 

There is BLANK VacControl_BAK.adl screen only. 

I can move a valve by disconnecting it's  solenoid power if it's position is normally open.

I will close V1 and check computer cable connections and move on with manual - hand disconnect ea valve to be moved into the right position for vent. Valve positions will be confirmed by looking manual indicators on valves.

 The 40m vacuum envelope vent is completed with instrument grade air.

Valve configuration: chamber open, RGA is pumped through VM3 by TP3,

  9576   Mon Jan 27 09:08:00 2014 SteveUpdateVAC4 days at atmosphere

 

 

Attachment 1: day4atm.png
day4atm.png
Attachment 2: vent76bgTp3d4.png
vent76bgTp3d4.png
  9581   Tue Jan 28 11:13:50 2014 KojiUpdateVAC vacuum monitor is still blank

[Steve Koji]

We pushed the reset button of c1vac1 and c1vac2 and the vacuum screen is back.

First, we pushed the reset button of c1vac1 and pushed the one on c1vac2.
This did not bring c1vac2 up. We pushed the reset of c1vac2 again and now everything of the vacuum screen is back.

  9582   Tue Jan 28 16:26:40 2014 SteveUpdateVAC vacuum computers are back without safety

Quote:

[Steve Koji]

We pushed the reset button of c1vac1 and c1vac2 and the vacuum screen is back.

First, we pushed the reset button of c1vac1 and pushed the one on c1vac2.
This did not bring c1vac2 up. We pushed the reset of c1vac2 again and now everything of the vacuum screen is back.

 1, Reset works

 2, Default values are lost. They actually reversed into open and turn on everything when power recycle c1vac1, c1vac2 or 24V dc power supply. This can vent the IFO in an event of power failure!

      It's may be the time to go back to an isolated, vacuum controller only computer.

 

The present valve configuration at Atm1

a, all annuloses are vented

b, valve cables disconnected at: VC1 and 4 IP gate valves

c, the RGA is off and it is pumped by the Maglev through VM2

d, cryo pump is being roughed with TP3  It's outgassing rate was 25 mTorr / min

e, Roughing hose is disconnected

Attachment 1: c1vac1_vac2areback.png
c1vac1_vac2areback.png
  9599   Wed Feb 5 08:14:59 2014 SteveUpdateVAC vacuum computers are back without safety

Quote:

 

 1, Reset works

 2, Default values are lost. They actually reversed into open and turn on everything when power recycle c1vac1, c1vac2 or 24V dc power supply. This can vent the IFO in an event of power failure!

      It's may be the time to go back to an isolated, vacuum controller only computer.

 

The present valve configuration at Atm1

a, all annuloses are vented

b, valve cables disconnected at: VC1 and 4 IP gate valves

c, the RGA is off and it is pumped by the Maglev through VM2

d, cryo pump is being roughed with TP3  It's outgassing rate was 25 mTorr / min

e, Roughing hose is disconnected

 Vacuum checks before pump down:

1, check intermittent contact issue in black relay box

2, reconnect cable to ion pumps and vent them to atm before pump down

3, repeat power shutdown-reboot at atmosphere

  9604   Wed Feb 5 19:36:50 2014 SteveUpdateVACpumpdown at 25 Torr

Quote:

[Steve, Manasa]

I checked the alignment one last time. The arms locked, PRM aligned, oplevs centered.

We went ahead and put the heavy doors ON. Steve is pumping down now!

 The ion pumps were vented just before pumpdown and their gate valves were opened.

This is an effort to minimize a possible leak through their gates.

Is there a volunteer who goes home late and would close off the roughing? tonight

Attachment 1: pd77at3.5h.png
pd77at3.5h.png
  9605   Wed Feb 5 19:53:51 2014 SteveUpdateVACpumpdown stops for the day at 14 Torr

 

 

Attachment 1: stopHere.png
stopHere.png
  9607   Thu Feb 6 11:14:07 2014 SteveUpdateVACpumpdown completed

 Pumpdown completed. IR shutter opened at P1 1 mTorr  The block is still in the beam path.

Remember to protect MCR pd before crack up the PSL power.

The ion pump gate valves were just closed by cc1 triggered interlock

The cry pump was "regenerated" during the vent and it's outgassing rate minimized.

CC3 cold cathode gauge was replaced.

 

Valve configuration for week end:

1, VA6 disconnected to avoid accidental venting the IFO through the annulos

2, VC2 disconnected to insure that the cryo stays closed

3, RGA is not running, It's pressure limit 1e-5 Torr

 

Attachment 1: pd77.png
pd77.png
  9615   Mon Feb 10 09:45:53 2014 SteveUpdateVACvacuum normal is reached

 

Quote:

 Pumpdown completed. IR shutter opened at P1 1 mTorr  The block is still in the beam path.

Remember to protect MCR pd before crack up the PSL power.

The ion pump gate valves were just closed by cc1 triggered interlock

The cry pump was "regenerated" during the vent and it's outgassing rate minimized.

CC3 cold cathode gauge was replaced.

 

Valve configuration for week end:

1, VA6 disconnected to avoid accidental venting the IFO through the annulos

2, VC2 disconnected to insure that the cryo stays closed

3, RGA is not running, It's pressure limit 1e-5 Torr

 

 Valve configuration:       Vacuum Normal    is reached in really 4 days if we do not count overnight rest of roughing.

 VA6 and VC2 are reconnected. I'm turning on the RGA next

 

 All 4 ion pumps were vented with air and pumped down to ~ 1e-4 Torr

 Ion pumps gate valve control cables are connected and their pumps are disconnected.

 

 The black relay box was tested repeatedly and it stopped misbehaiving.

We were at atmosphere for 13 days.  Chamber BS, ITMX, ITMY and ETMY were opened.

Al foil "cups" were placed on the back side OSEMs of PRM.

Attachment 1: pd77m5d.png
pd77m5d.png
Attachment 2: 13daysAtm.png
13daysAtm.png
  9622   Tue Feb 11 10:44:15 2014 SteveUpdateVACRGA scan at day 6

 

 

Attachment 1: pd77m6d.png
pd77m6d.png
  9644   Tue Feb 18 10:38:55 2014 SteveUpdateVACRGA scan at day 13

 All normal.

 

Attachment 1: pd77m13d.png
pd77m13d.png
Attachment 2: RGAscan13d.png
RGAscan13d.png
  9703   Fri Mar 7 16:13:03 2014 SteveUpdateVACpumping speed is recovered

Quote:

 

 

 Valve configuration:       Vacuum Normal    is reached in really 4 days if we do not count overnight rest of roughing.

 VA6 and VC2 are reconnected. I'm turning on the RGA next

 

 All 4 ion pumps were vented with air and pumped down to ~ 1e-4 Torr

 Ion pumps gate valve control cables are connected and their pumps are disconnected.

 

 The black relay box was tested repeatedly and it stopped misbehaiving.

We were at atmosphere for 13 days.  Chamber BS, ITMX, ITMY and ETMY were opened.

Al foil "cups" were placed on the back side OSEMs of PRM.

Pd 76 and 77 are compared at 30 days of pumping. We spend 13-14 days at atmosphere  before each.

 Pump down 76 was with leaky ion pump gate valve. The ion pumps are not in use for years so they accumulated some higher pressure  PLUS the valve switching caos at computer reboot most likely

increased the ion pumps pressures to about 10-20 torr

I think one of the ion pump gate valve was not sealing well. This leak was holding back pump down speed at pd76

Attachment 1: pumpingSpeed.png
pumpingSpeed.png
  9723   Wed Mar 12 08:40:42 2014 SteveUpdateVACRGA scan at day 35

 

 

Attachment 1: pd77m35d.png
pd77m35d.png
  9745   Mon Mar 24 10:41:46 2014 SteveUpdateVACRGA scan at day 50

 

 

Attachment 1: pd77m50dRGA.png
pd77m50dRGA.png
  9746   Mon Mar 24 19:42:12 2014 CharlesFrogsVACPower Failure

 The 40m experienced a building-wide power failure for ~30 seconds at ~7:38 pm today.

Thought that might be important...

  9749   Tue Mar 25 14:52:57 2014 steveUpdateVACvacuum is recovered

 Out gassing plus leak rate   0.15  mTorr / hour

 The pressure rose to 2.5 mTorr in 17 hours

 V1 was opened at 1:56pm

 VM2 opened at 2:10 so the RGA region is back to 1e-5 torr

 

Attachment 1: 17hrsNoPumping.png
17hrsNoPumping.png
  9757   Fri Mar 28 16:26:20 2014 steveUpdateVACRGA scan after power failure

Quote:

 Out gassing plus leak rate   0.15  mTorr / hour

 The pressure rose to 2.5 mTorr in 17 hours

 V1 was opened at 1:56pm

 VM2 opened at 2:10 so the RGA region is back to 1e-5 torr

 

 

Attachment 1: afterPowerFailure.png
afterPowerFailure.png
  9776   Wed Apr 2 16:34:15 2014 SteveUpdateVACMaglev controller needs service

Quote:

Quote:

 The date is correct on this monitor.

Last stored RGA scan data Dec 20, 2013

IFO pressure at CC1 5.8e-6 Torr

Valve configuration: Vacuum Normal, confirmable only by manual checking of position indicators and pressure gauge controllers  readouts

 

 The Osaka TG390MCAB maglev turbo pump's controller TC010M has passed the 40,000 hrs of operation. This triggered the " alarm" LED  warning light to come on. 

It is normal maintenance.  Maglev TP-1 is running perfectly.  Osaka will send us a loaner-controller that we can use while they do the std maintenance.

I'm thinking of ~ February to do this.

 We just received the loaner controller that will be swapped in it tomorrow morning.

The vacuum pressure will rise somewhat during this action.

  9782   Thu Apr 3 17:05:52 2014 SteveUpdateVACMaglev controller swapped

Quote:

Quote:

Quote:

 The date is correct on this monitor.

Last stored RGA scan data Dec 20, 2013

IFO pressure at CC1 5.8e-6 Torr

Valve configuration: Vacuum Normal, confirmable only by manual checking of position indicators and pressure gauge controllers  readouts

 

 The Osaka TG390MCAB maglev turbo pump's controller TC010M has passed the 40,000 hrs of operation. This triggered the " alarm" LED  warning light to come on. 

It is normal maintenance.  Maglev TP-1 is running perfectly.  Osaka will send us a loaner-controller that we can use while they do the std maintenance.

I'm thinking of ~ February to do this.

 We just received the loaner controller that will be swapped in it tomorrow morning.

The vacuum pressure will rise somewhat during this action.

 The loaner controller is swapped in. It has  520 Hz rotation speed.  This speed use to be 680 Hz with our old one.

Attachment 1: loanerControllerIn.png
loanerControllerIn.png
  9795   Thu Apr 10 16:09:29 2014 SteveUpdateVACRGA scan at 75% pumping speed

Quote:

 

 The loaner controller is swapped in. It has  520 Hz rotation speed.  This speed use to be 680 Hz with our old one.

 

Attachment 1: 520HzpumpingSpeed.png
520HzpumpingSpeed.png
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