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ID Date Authorup Type Category Subject
  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
  9488   Wed Dec 18 13:34:03 2013 SteveUpdateGeneralLIGOX people

40m crew and visitor Holger Muller from Berkeley.

Attachment 1: 40m2013Dec.jpg
40m2013Dec.jpg
Attachment 2: 40mCup.jpg
40mCup.jpg
  9489   Wed Dec 18 15:35:48 2013 SteveUpdatePEMexcess seismic noise

This is not a test. Life can be dangerous in the 40m Control  Room.

Attachment 1: seismicCar.jpg
seismicCar.jpg
  9504   Fri Dec 20 17:41:25 2013 SteveUpdateGeneralProjector - lightbulb replaced

 The lamp lasted for 4,622 hours.

This time I purchased just the bare lamp itself . The housing doubles the price. The disadvantage of this technic that the lamp housing window can not be cleaned  perfectly. Atm2 picture is exaggerating this spot.

However, It does not degrade the image quality.

Roll over image to zoom in

      

 
 

Glamps RLC-061 Projector Original Bulb Lamp for VIEWSONIC Pro8200 Pro8300

 

 

Attachment 1: explodedlamp.jpg
explodedlamp.jpg
Attachment 2: clweanedWindowShield.jpg
clweanedWindowShield.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
  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
  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
  9524   Tue Jan 7 10:44:13 2014 SteveUpdateIOOMC drift

Quote:

 The trend shows a big jolt to the MC1/3 pointing this morning at 8:30.

Was anyone working anywhere near there today? There is no elog.

If not, we will have to put a 'no janitor' sign on all of the 40m doors permanently to prevent mops misaligning our interferometer.

 I was taking pictures at the AP table at the morning and ETMX optical table after noon. There was no activity on the IOO chamber.

 Look at the last 2 hours of  Rana's trend plot. MC1 and MC2 sensor voltage started increasing.

I think it was a drift action.

Attachment 1: 2dTrend.png
2dTrend.png
Attachment 2: driftNotKick.png
driftNotKick.png
  9542   Thu Jan 9 10:34:58 2014 SteveUpdatePSLPSL pointing changes in pitch

  IOO QPDs tested in dark, lighted and open PSL enclosure. The created temperature change 0.03 C has  effect on monitoring  in pitch.

 

 Atm1,  all lights off 10 min, PSL enclosure lights on  10 min, all lights off 15 min, open  door # 11 at north east corner of enclosure ( HEPA filters are running at 30V ) for 10 min, closed-dark enclosure 15 min

              dark 10, lighted 10, dark 15, open-dark 10 and closed-dark 15 minutes

 

Atm2, Pitch drift of 24 hours does not recover

Attachment 1: Lfnfdnc.png
Lfnfdnc.png
Attachment 2: 24hPSLpointing.png
24hPSLpointing.png
  9545   Fri Jan 10 10:28:03 2014 SteveUpdatePSLPSL pointing changes

 

I looked at IOO QPDs again. QPD_POS was clamped by one screw. Dog clamp was added on the unclamped side.

QPD_ANG chassis has no isolation to optical table..._POS has.  QPD_ANG  base was tightened also.

Both QPDs moved a little bit but I did not centered them.  The spot sizes are 2-3 mm  They should be smaller.

How ever, we still can not explane the pitch movement of the IOO beam

 

Razor beam dumps were labeled at the AP table.

 

The 40m roof was cleaned from leafs this morning.

 

 

Attachment 1: clamped.png
clamped.png
  9547   Fri Jan 10 15:33:02 2014 SteveUpdatePSLlaser drift monitor set up idea

this locationQuote:

Quote:

Quote:

I wonder what's drifting between the laser and the PMC? And why is it getting worse lately?

 The PMC refl is bad in pitch today, and the transmission is only 0.76, rather than our usual 0.83ish.

I did a quick, rough tweak-up of the alignment, and now we're at 0.825 in transmission.

 The PMC transmission continuously degrades. In order to see what is really drifting the laser output after PBS was sampled as shown.

 IOO pointing is drifting in pitch. I'd like to use a QPD instead of the paper target to see if the Innolite output is stable. The idea is to move temporarily IOO-QPD_POS to  this location

Attachment 1: 2daysDrift.png
2daysDrift.png
  9549   Mon Jan 13 11:08:48 2014 SteveUpdatePSL3 good days of IOO pointing

 Three good days of IOO pointing: Friday, Sat and Sun    What was changed?  May be the clamping on Friday?

IOO vertical changes recovering as tempeture. IP is clipping at plastic enclosure of ETMY

 

NOTE: ANTS at the PSL optical table.  I will mop with chemicals tomorrow if we see more.

 

Attachment 1: 3gdPSLpointing.png
3gdPSLpointing.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.

  9552   Tue Jan 14 10:12:12 2014 SteveUpdatePSLlaser drift monitor set up idea

Quote:

this locationQuote:

Quote:

Quote:

I wonder what's drifting between the laser and the PMC? And why is it getting worse lately?

 The PMC refl is bad in pitch today, and the transmission is only 0.76, rather than our usual 0.83ish.

I did a quick, rough tweak-up of the alignment, and now we're at 0.825 in transmission.

 The PMC transmission continuously degrades. In order to see what is really drifting the laser output after PBS was sampled as shown.

 IOO pointing is drifting in pitch. I'd like to use a QPD instead of the paper target to see if the Innolite output is stable. The idea is to move temporarily IOO-QPD_POS to  this location

 I do like to move IOO-QPD_POS temporarily to see that the feedback has anything to do with with the pointing.

Attachment 1: bad4thday.png
bad4thday.png
  9553   Tue Jan 14 10:34:57 2014 SteveUpdatePSLgreen transmission measurment

GariLyn is using our green light on the west side of the PSL table. The green PDA36As were moved and the HEPA turned up to 60V

Attachment 1: greenPickUp.jpg
greenPickUp.jpg
  9559   Thu Jan 16 08:19:29 2014 SteveUpdatePEM4.4 and 3.8M local earth quakes


It looks like there was a 4.4 magnitude earthquake near Fontana, CA around 1:30am today.  This tripped all of the suspension watchdogs, which Q has just now re-enabled. 

   Earth quake shake down yesterday Atm1

Atm2, today's shake

Attachment 1: local4.4eq.png
local4.4eq.png
Attachment 2: local3.8eq.png
local3.8eq.png
  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
  9580   Tue Jan 28 09:51:47 2014 SteveUpdateIOOlow power pointing

 

PSL output is stable.

Attachment 1: IOO4dlowpr.png
IOO4dlowpr.png
  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
  9591   Mon Feb 3 10:17:14 2014 SteveUpdatePEMdusty surfaces

Please wet WIPE before opening chamber or optical table ! ! 

 with methanol soaked kimwipes.

The Met One particle counter is located on CES wall, just behind ITMX chamber. 

The numbers are not so bad, but have you ( ...a)  asked the IFO lately?

Attachment 1: AP-ISCT.jpg
AP-ISCT.jpg
Attachment 2: BSC-rim.jpg
BSC-rim.jpg
Attachment 3: ITMX-ISCT.jpg
ITMX-ISCT.jpg
Attachment 4: 12daysAtm.png
12daysAtm.png
  9592   Mon Feb 3 15:57:52 2014 SteveUpdateGreen LockingETMX green power

There was 0.2 mW green at the X end.

The doubling oven temp was changed from 37.5 to 36 degrees C

Power at green shutter 3 mW  The alignment was not touched.

Attachment 1: ETMXgreen.jpg
ETMXgreen.jpg
Attachment 2: XgreenOven36C.jpg
XgreenOven36C.jpg
  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

  9600   Wed Feb 5 09:28:32 2014 SteveUpdateSUSETMY damping restored

ETMY damping restored.

  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
  9623   Tue Feb 11 16:49:36 2014 SteveUpdatePEM floor cleaning

 Keven, Steve

 

The floor was cleaned under the east arm tube with hand held wet towel. We moved staff around and mopped. I did at the bottom of rack  1Y1, 2  and 3. 

Last week we did the south arm tube floor.

Next week we 'd like to clean under rack 1X1,2,3, 4, 5, 6 and 7 

  9628   Wed Feb 12 14:59:36 2014 SteveUpdateSUSclipping removed from PRM oplev

 The input pointing of PRM oplev beam was streered just a touch to remove clipping from it's return. 

The spots  did not move visibly on these two lenses.  The spot diameter on the qpd is  ~1.5 mm,  65 micro W and 3440 counts.  

Attachment 1: PRMoplPointing.jpg
PRMoplPointing.jpg
Attachment 2: PRMoplevReturn.jpg
PRMoplevReturn.jpg
  9633   Thu Feb 13 16:48:33 2014 SteveUpdateGreen LockingX and Y arm green tuned details

Quote:

Y arm green: Nothing much was disturbed. I touched the steering mirrors and brought GTRY from 0.2 to 0.9.

X arm green: The PDH lock was not very stable mostly because of the low power in green. I changed the oven temperature for the doubler to 36.4 corresponding to maximum green power. GTRX increased from 0.1 to 0.9

Both the X and Y arm green alignment were tuned on the PSL table to their respective beat PDs.

The PSL green shutter was not responding to the medm buttons. I found the PSL green shutter set to 'local' and 'N.O' (these are switches in the shutter controller). I do not see any elog and not sure as to why the controller was even touched in the first place. I set the shutter controls to 'remote' and 'N.C'.

 ETMX green power at shutter 3.6 mW at 36.35 C doubler crystal temp.   [ Innolight IR settings 2.0 A,  40.83 C,  500 mW before Faraday 1/2 plate ] 

 ETMY green power at shutter 0.75 mW  at 35.8 C  doubler crytal temp.  [ NPRO IR settings 1.82A,  231 mW_ display,  DT 21 C, DTEC +1V, LT 40 C, LTEC 0.1V, T +41.041 ]  

  9643   Tue Feb 18 10:10:07 2014 SteveUpdatePEM floor cleaning under racks

Quote:

 Keven, Steve

 

The floor was cleaned under the east arm tube with hand held wet towel. We moved staff around and mopped. I did at the bottom of rack  1Y1, 2  and 3. 

Last week we did the south arm tube floor.

Next week we 'd like to clean under rack 1X1,2,3, 4, 5, 6 and 7 

 Keven, Steve

1Y4, 1X1,2,3,4 & 5 instrument racks floor space were cleaned.

  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
  9665   Mon Feb 24 17:21:42 2014 SteveUpdateGreen Lockinggreen fiber status today

Quote:

Alex, Gautam and Steve,

Single mode fiber 50m long is layed out into cable tray that is attached to the beam tube of the Y arm.

It goes from ETMY to PSL enclosure. It is protected at both ends with " clear- pvc, slit corrugated loom tubing " 1.5" ID

The fiber is not protected between 1Y1 and 1Y4

 The X -arm fiber is in the high cable tray and it has has  coupler mounts.

 The Y -arm fiber is in the low cable tray and it has no coupler mounts.

 The fibers are only protected at entering and exiting the trays.

 We have only 68 ft spare 1.5"  ID protective plastic tubing.

Attachment 1: etmy_F@1Y2.JPG
etmy_F@1Y2.JPG
Attachment 2: etmy-F@PSL_.jpg
etmy-F@PSL_.jpg
Attachment 3: etmx_F@se.JPG
etmx_F@se.JPG
Attachment 4: etmx_F@1Y8.JPG
etmx_F@1Y8.JPG
Attachment 5: etmx_F@PSL.JPG
etmx_F@PSL.JPG
Attachment 6: etmy_F@ee__.jpg
etmy_F@ee__.jpg
  9678   Wed Feb 26 10:08:14 2014 SteveUpdateIOOIOO trend

 

 The MC is happy (but only for this tiny snapshot in time and most probably will go dysfunctional again as it has been for several months, as of this writing)

Attachment 1: IOOtrend3&24h.png
IOOtrend3&24h.png
  9689   Tue Mar 4 17:07:27 2014 SteveUpdatePEM floor cleaning under racks

Quote:

Quote:

 Keven, Steve

 

The floor was cleaned under the east arm tube with hand held wet towel. We moved staff around and mopped. I did at the bottom of rack  1Y1, 2  and 3. 

Last week we did the south arm tube floor.

Next week we 'd like to clean under rack 1X1,2,3, 4, 5, 6 and 7 

 Keven, Steve

1Y4, 1X1,2,3,4 & 5 instrument racks floor space were cleaned.

 Keven, Steve

 

1X6, 1X7 and 1X9 instrument racks floor space were cleaned today

  9697   Thu Mar 6 09:47:11 2014 SteveUpdateIOOMC trend of 20 days

Quote:

The IMC has not been behaving well since this morning and totally not happy when Q was finishing his measurements. The WFS servo had large offsets in pitch. Looking back at the trend and using ezcaservo to restore the suspensions did not help.

I realigned the IMC and brought TRANS SUM to ~18000 and MCREFL to < 0.5. The spot positions are not very good; nearly 2 mm off in pitch on MC1 and MC3. But after the alignment of MC, the WFS servo offsets were below +/-20.

The MC has been locked stably with WFS servo ON for the last few hours.

P.S. I did not touch the WFS pointing or reset the WFS offsets.

 

Attachment 1: IOO_20days.png
IOO_20days.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
  9726   Fri Mar 14 09:44:34 2014 SteveUpdateLSCmorning lock
Attachment 1: 2hrsMorningLock.png
2hrsMorningLock.png
  9729   Mon Mar 17 09:27:05 2014 SteveUpdateSUS4.4M local earthquake

 It looks like that ETMX have  2 sticky magnets.

 

Attachment 1: 4.4M-Encino.png
4.4M-Encino.png
Attachment 2: 3.9-4.4Meq.png
3.9-4.4Meq.png
Attachment 3: EQdamage4.4.png
EQdamage4.4.png
  9737   Tue Mar 18 08:31:37 2014 SteveUpdateSUS4.4M local earthquake & its miracle

Quote:

It was little bit surprising to me but Rana's professorial rock'n roll excitation released its sticking on the unconfirmed thing by unconfirmed reason.

I aligned the Xarm manually and via ASS.

Now we are back in the normal state.

 This recovery proceeder deserves a pattern

Note: IR shield glass position variations,  Atm4

Attachment 1: miracel.png
miracel.png
Attachment 2: ETMX_LR.JPG
ETMX_LR.JPG
Attachment 3: ETMX_LR-UL.JPG
ETMX_LR-UL.JPG
Attachment 4: ETMX_UL-LL-S-IRshield.jpg
ETMX_UL-LL-S-IRshield.jpg
  9738   Tue Mar 18 18:05:57 2014 SteveUpdateSUSETMX osem UR

 

  UR osem IR shield glass is pushed back. It came out of its clip holder. The magnet is free.

  Atm2,  UL & LL magnets  centered poorly. Almost hinging on opposite sides.

              UR & LR centered well.  There have plenty of room to move in an earth quake.

Attachment 1: ETMX_URcollapsing.jpg
ETMX_URcollapsing.jpg
Attachment 2: ETMX_outoffocus.JPG
ETMX_outoffocus.JPG
Attachment 3: URisFREE.png
URisFREE.png
  9741   Thu Mar 20 11:16:16 2014 SteveUpdateGeneralnew projector

 

[ Manasa, Ericq and Steve ]

 Vivitek D952HD with 186 hours installed.

  9745   Mon Mar 24 10:41:46 2014 SteveUpdateVACRGA scan at day 50

 

 

Attachment 1: pd77m50dRGA.png
pd77m50dRGA.png
  9763   Mon Mar 31 08:11:00 2014 SteveUpdateSUSrecovery from earthquakes

Quote:

* EQ Southeast of LA around 45 minutes ago. Callum and I felt it.

* Koji and I came in to recover. MC suspensions had been mis-aligned. ETMs both tripped their watchdogs.

* As before, the ETMX was stuck in its cage and the UR & LR OSEMs were reading zero V.

* We moved the MC sus back to their OSEM values from 2 hours ago. Koji aligned everything else by just using his chee.

* To shake the ETMX loose, I tried a different tactic than the "Great Balls of Fire". I started giving it 20k steps through the ASCYAW filterbank (with ramping OFF). I used the green light in the X arm video to look at the swinging. Using this as a readback I pumped the OFFSET button on ASCYAW to resonantly swing up the yaw motion. I had to turn the watchdog thresh up to 2000 temporarily. After a couple minutes the ETMX was free.

* We then used the bias sliders to steer it back onto the OL center (which Q nicely lined up for us recently) and then X arm locked in green right away.

Fri Mar 28 22:38:04 2014:  We've just ridden through the 5th aftershock. None of the aftershocks have tripped the watchdogs  but they break the IMC lock.

Local earthquake activity is up. Our suspensions are holding well.    ETMX and ETMY sus damping restored.

Attachment 1: local5.1eq.png
local5.1eq.png
Attachment 2: EQ4.4-5.1-3.3-16days.png
EQ4.4-5.1-3.3-16days.png
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