ID |
Date |
Author |
Type |
Category |
Subject |
10506
|
Mon Sep 15 15:52:44 2014 |
Steve | Update | SUS | PRM damping restored |
The PRM side was kicked up |
10508
|
Tue Sep 16 10:47:52 2014 |
Steve | Update | PSL | Laser turned on |
Our janitor turned off the laser accidentally. |
10511
|
Tue Sep 16 17:02:41 2014 |
Steve | Update | Computer Scripts / Programs | PSL output shutter is floating |
Quote: |
Quote: |
Q and Steve will follow elog 10028 entry to prepare the vacuum system for safe reboot
|
Here's the sequence of the morning so far:
- I aligned the IFO (IR arms with ASS, X green with PZTs, PRM with PRMI locked on REFL33)
- I closed the PSL shutter, and went inside to align PRM and both ITM oplevs (all others were within 10urad of zero in both directions)
- While aligning those oplevs, I noticed the smell of burnt electronics. We tracked it down to the +15V sorensen in the rack nearest the PSL table
- I claim the precipitating event was PSL shutter activity. If I recall correctly, the seismic rainbow traces went bonkers around the same time as the shutter was closed. There is a Guralp interface in the rack powered by the failed sorensen, so this would explain the erratic seismometer signals correlated with the power supply failure. We will look into potential shorts caused by the shutter. (Steve looked up the PMC trans and Guralp DQ channels, and confirmed the temporal coincidence of the events.)
- We shut off all of the sorensens so that electronics were not being driven asymmetrically.
- Steve and I secured the vacuum system for computer reboots, as referred to in Steve's elog. Some combination of Jenne, Rana and Manasa shut down the control room computers, and turned off the watchdogs.
- Manasa and I moved Chiara inside, next to Mafalda, along with its backup HDs. It has been labeled.
- Booted up control room machines, they came up happy.
- FB and front-ends didn't need reboot, for some lucky reason. Watchdogs came back happily, oplev spots didn't move noticeably.
The IFO is still down, as the PMC won't lock without the rack power, and we haven't pinned down the shorting mechanism. We don't want the replacement sorensen to immediately blow when plugged in.
|
The Uniblitz shutter is insulated at the optical table. I only realized it when it was in my hand. The 3"x2" base plate is black DELRIN !
In the future we must label black Delrin base plate where it is used. Now we have white Delrin and light bran PEEK base plates for the same function. |
10517
|
Thu Sep 18 09:17:47 2014 |
Steve | Update | SUS | HeNe laser test |
TEST QPD sn 222 was calibrated with 1103P directly looking into it from 1 m. ND2 filter was on the qpd.
|
Attachment 1: calibrated_16hrs.png
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Attachment 2: QPD222cal.jpg
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Attachment 3: 1103P40s40min.png
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10522
|
Mon Sep 22 10:14:07 2014 |
Steve | Update | SUS | HeNe laser test |
Quote: |
TEST QPD sn 222 was calibrated with 1103P directly looking into it from 1 m. ND2 filter was on the qpd.
|
|
Attachment 1: 1103Pmon3d.png
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10524
|
Mon Sep 22 15:20:32 2014 |
Steve | Update | VAC | RGA scan at day 229 |
|
Attachment 1: RGA@229day.png
|
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Attachment 2: RGAscan229d.png
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|
10525
|
Tue Sep 23 08:34:14 2014 |
Steve | Update | SUS | HeNe laser test |
The room temp drops 1 degree C on the 4th day. The weather has changed. |
Attachment 1: tempDrop.png
|
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10526
|
Tue Sep 23 09:37:12 2014 |
Steve | Update | SUS | IOO and temp changes |
|
Attachment 1: IOO.png
|
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10530
|
Wed Sep 24 08:40:29 2014 |
Steve | Update | VAC | Vent has started |
Jam nuts checked. Oplev servos turned off. Particle count checked. Vertex crane functionality checked. |
Attachment 1: vent77.png
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|
Attachment 2: bvent77.png
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10532
|
Wed Sep 24 13:28:48 2014 |
Steve | Update | VAC | vent is completed |
The vent is completed. ITMX was kicked up accidentally. Valve configuration: chamber open, RGA is pumped through VM2 Maglev |
Attachment 1: ventiscompleted.png
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|
Attachment 2: atAtm.png
|
|
10536
|
Thu Sep 25 08:21:15 2014 |
Steve | Update | VAC | vent day 1 |
Quote: |
[Steve, EricQ, Jenne]
ITMY and BS heavy doors are off, light doors are on. Q is aligning the IFO.
|
|
Attachment 1: ventDay1.png
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10537
|
Thu Sep 25 10:53:32 2014 |
Steve | Update | SUS | HeNe laser test |
|
Attachment 1: centeredDay6.png
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10542
|
Fri Sep 26 09:13:17 2014 |
Steve | Update | SUS | vent day 2 |
ITMY in vac table needs leveling. |
Attachment 1: ventDay2.png
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|
Attachment 2: ITMY.png
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10547
|
Mon Sep 29 09:11:25 2014 |
Steve | Update | VAC | vent day 5 RGA scan |
|
Attachment 1: v77_bg-mag-d5.png
|
|
10548
|
Mon Sep 29 10:29:25 2014 |
Steve | Update | VAC | RGA is not running |
The RGA time stamp was correct last at 20140527
Rga stopped scanning at 20140530 |
Attachment 1: rgascanTimeStamp.png
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|
10553
|
Tue Sep 30 16:18:57 2014 |
Steve | Update | VAC | pump down #78 has started |
Q checked the earth quake stops of SRM and we put the ITMY & BS doors on. |
Attachment 1: pd78hastarted.png
|
|
10555
|
Tue Sep 30 18:02:53 2014 |
Steve | Update | VAC | pump down #78 stops at 320 Torr |
We stopped pumping just short of 3 hours at 320 Torr. Pumping speed was 2.7 Torr / min with partially closed RV1 and butterfly valve/
RP1&3 roughing pump hose is disconnected. Butterfly valve removed. The vac envelope is closed. |
Attachment 1: 3h.png
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|
10556
|
Wed Oct 1 10:21:19 2014 |
Steve | Update | VAC | pump down #78 stops at 3.5 Torr |
Quote: |
We stopped pumping just short of 3 hours at 320 Torr. Pumping speed was 2.7 Torr / min with partially closed RV1 and butterfly valve/
RP1&3 roughing pump hose is disconnected. Butterfly valve removed. The vac envelope is closed.
|
This is our second stop. I will be back this afternoon. IFO P1 3.5 Torr
|
Attachment 1: pd78secondStop.png
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10557
|
Wed Oct 1 16:26:53 2014 |
Steve | Update | VAC | pump down #78 completed |
Pump down reached "vacuum normal" state. IFO _P1 pressure 1e-4 torr in 8 hrs actual pumping time
PSL shutter is opened. |
Attachment 1: pd78completedin25hrs.png
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|
10559
|
Thu Oct 2 09:23:23 2014 |
Steve | Update | VAC | vent 77 |
Quote: |
Pump down reached "vacuum normal" state. IFO _P1 pressure 1e-4 torr
PSL shutter is opened.
|
IFO_P1 pressure 1.6e-5 torr after 6 days at atm
PS: PSL sliding door 11 was left open overnight. The PSL particle count will reach room counts in 20 seconds at low speed of HEPA |
Attachment 1: vent77SRMmoved.png
|
|
10563
|
Fri Oct 3 10:10:37 2014 |
Steve | Update | VAC | cold cathode gauge reading switched |
We have two cold cathode gauges at the pump spool and one signal cable to controller. CC1 in horizontal position and CC1 in vertical position.
CC1 h started not reading so I moved cable over to CC1 v |
Attachment 1: CC1switched.png
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|
10568
|
Mon Oct 6 10:23:43 2014 |
Steve | Update | VAC | Unexpected power shutdown |
Quote: |
We had an unexpected power shutdown for 5 sec at ~ 9:15 AM.
Chiara had to be powered up and am in the process of getting everything else back up again.
Steve checked the vacuum and everything looks fine with the vacuum system.
|
PSL Innolight laser and the 3 units of IFO air conditions turned on.
The vacuum system reaction to losing power: V1 closed and Maglev shut down. Maglev is running on 220VAC so it is not connected to VAC-UPS. V1 interlock was triggered by Maglev "failure" message.
Maglev was reset and started. After Chiara was turned on manually I could bring up the vac control screen through Nodus and opened V1
"Vacuum Normal" valve configuration was recovered instantly.
Chiara needs UPS
It is arriving Thursday |
10576
|
Tue Oct 7 16:17:15 2014 |
Steve | Update | General | reason for 8 sec power outage |
Quote: |
We had a unexpected power shutdown for 5 sec at ~ 9:15 AM.
Chiara had to be powered up and am in the process of getting everything else back up again.
Steve checked the vacuum and everything looks fine with the vacuum system.
|
There was an equipment malfunction in one of Pasadena's substation that caused the outage. After about an 8 second delay, back up circuits restored power. This affected about 1/2 of the campus.
Mike
-----Original Message-----
From: Steve Vass [mailto:steve@ligo.caltech.edu]
Sent: Tuesday, October 07, 2014 2:18 PM
To: Anchondo, Michael
Subject: 5s
Hi Mike,
Can you tell me about yesterday's power outage?
Thanks, Steve
|
10579
|
Tue Oct 7 16:55:16 2014 |
Steve | Update | VAC | Unexpected sweaty valves |
Pump spool valves V5, V4, V3 sweating a lot. VM3 and VC2 not so much.
They are VAT valves F28-62887-03, 11, 14 and so on ~15-16 years old.
I'm speculating that some plastic is aging-braking down at the atmospheric-pneumatic side of valves.
The vacuum side is not effected, according to vacuum pressure readings.
May be some condensation from the small turbos? No
I'm looking for an identical valve to examine, but I can not find one.
We are using industrial grade 99.96% Nitrogen to actuate these valves.
Valves are not effected are dry: VA6, V6, V7 and all annuloses.
|
Attachment 1: sweatyV5.jpg
|
|
Attachment 2: sweatyV5f.jpg
|
|
10584
|
Wed Oct 8 08:46:57 2014 |
Steve | Update | VAC | VAT valves actuator lubricant |
Quote: |
Pump spool valves V5, V4, V3 sweating a lot. VM3 and VC2 not so much.
They are VAT valves F28-62887-03, 11, 14 and so on ~15-16 years old.
I'm speculating that some plastic is aging-braking down at the atmospheric-pneumatic side of valves.
The vacuum side is not effected, according to vacuum pressure readings.
May be some condensation from the small turbos? No
I'm looking for an identical valve to examine, but I can not find one.
We are using industrial grade 99.96% Nitrogen to actuate these valves.
Valves are not effected are dry: VA6, V6, V7 and all annuloses.
|
VAT's answer:
Yes, our engineers are aware of this issue. They say:
The pneumatic actuator needs lubricant as the O-ring (Viton) slides in the cylinder. Without grease the O-ring would be abraded and leaking after only a relatively few cycles. The lubricant used in our pneumatic actuators is an emulsion of oil and Teflon flakes. Vibration, many cycles and sometimes high temperature lead to the separation of the oil and Teflon. That is apparently the issue you are seeing.
VAT is and has been testing and qualifying new lubricants, and this is one of the factors we are always looking to improve. The formula we used 15 years ago in these valves seems to have performed reasonable well. Our formula today should perform even better.
We realize this explanation does not help you with these existing valves, but 15 years of service is not too bad is it?
Steve -NOTE:bonnet seal is metal so there is no way this oil can get into our vacuum ( only if the bellow leaks ) |
10587
|
Thu Oct 9 11:56:35 2014 |
Steve | Update | VAC | Power outage II & recovery |
Quote: |
Post 30-40min unexpected power outage this morning, Steve checked the status of the vacuum and I powered up Chiara.
I brought back the FE machines and keyed all the crates to bring back the slow machines but for the vac computers.
c1vac1 is not responding as of now. All other computers have come back and are alive.
|
IFO vacuum, air condition and PMC HV are still down. PSL out put beam is blocked on the table. |
10590
|
Thu Oct 9 17:33:28 2014 |
Steve | Update | VAC | Power outage II & recovery |
Quote: |
Quote: |
Post 30-40min unexpected power outage this morning, Steve checked the status of the vacuum and I powered up Chiara.
I brought back the FE machines and keyed all the crates to bring back the slow machines but for the vac computers.
c1vac1 is not responding as of now. All other computers have come back and are alive.
|
IFO vacuum, air condition and PMC HV are still down. PSL out put beam is blocked on the table.
|
We are pumping again. This is a temporary configuration. The annuloses are at atmosphere. The reset reboot of c1Vac1 and 2 opened everything except the valves that were disconnected.
TP2 lost it's vent solenoid power supply and dry pump during the power outage.
They were replaced but the new small turbo controller is not set up as the old TP2 was so it does not allow V4 to open.
Tomorrow I will swap back the old controller, pump down the annuloses and close off the ion pumps.
I removed the beam block from the PSL table and opened the shutter. CC4 has the real pressure 2e-5 Torr
CC1 is not real. |
Attachment 1: pumpingAgain.png
|
|
10596
|
Fri Oct 10 14:27:44 2014 |
Steve | Update | CDS | c1Vac1 and c1vac2 reboot was a failure |
Quote: |
Quote: |
I have brought back c1auxex and c1auxey. Hopefully this elog will have some more details to add to Rana's elog 10015, so that in the end, we have the whole process documented.
The old Dell computer was already in a Minicom session, so I didn't have to start that up - hopefully it's just as easy as opening the program.
I plugged the DB9-RJ45 cable into the top of the RJ45 jacks on the computers. Since the aux end station computers hadn't had their bootChanges done yet, the prompt was "VxWorks Boot" (or something like that). For a computer that was already configured, for example the psl machine, the prompt was "c1psl", the name of the machine. So, the indication that work needs to be done is either you get the Boot prompt, or the computer starts to hang while it's trying to load the operating system (since it's not where the computer expects it to be). If the computer is hanging, key the crate again to power cycle it. When it gets to the countdown that says "press any key to enter manual boot" or something like that, push some key. This will get you to the "VxWorks Boot" prompt.
Once you have this prompt, press "?" to get the boot help menu. Press "p" to print the current boot parameters (the same list of things that you see with the bootChange command when you telnet in). Press "c" to go line-by-line through the parameters with the option to change parameters. I discovered that you can just type what you want the parameter to be next to the old value, and that will change the value. (ex. "host name : linux1 chiara" will change the host name from the old value of linux1 to the new value that you just typed of chiara).
After changing the appropriate parameters (as with all the other slow computers, just the [host name] and the [host inet] parameters needed changing), key the crate one more time and let it boot. It should boot successfully, and when it has finished and given you the name for the prompt (ex. c1auxex), you can just pull out the RJ45 end of the cable from the computer, and move on to the next one.
|
Koji, Jenne and Steve
Preparation to reboot:
1, closed VA6, V5 disconnected cable to valves ( closed all annuloses )
2, closed V1, disconnected it and stopped Maglev rotation
3, closed V4, disconnected its cable
See Atm1, This set up is insured us so there can not be any accidental valve switching to vent the vacuum envelope if reboot-caos strikes.[moving=disconnected]
4, RESET c1Vac1 and c1Vac2 one by one and together. They both went at once. We did NOT power recycled.
Jenne entered the new "carma" words on the old Dell laptop and checked the good answers. The reboot was done.
Note: c1Vac1 green-RUN indicator LED is yellow. It is fine as yellow.
5, Checked and TOGGLED valve positions to be correct value ( We did not correct the the small turbo pumps monitor positions, but they were alive )
6, V4 was reconnected and opened. Maglev was started.
7, V1 cable reconnected and opened at full rotation speed of 560 Hz
8, V5 cable reconnected, valve opened..............VA6 cable connected and opened........
9, Vacuum Normal valve configuration was reached.
|
Yesterday's reboot was prepared as stated above with one difference.
c1Vac1 and c1Vac2 were DOWN before reset. The disconnected valves stayed closed (plus VC1) . This saved us, so the main volume was not vented.
All others OPENED. PR1 and PR2 rouphing pumps turned ON. Ion pumps gate valve opened too. The ion pumps did not matter either because they were pump down recently.
We'll have to rewrite how to reboot vacuum.
|
Attachment 1: c1vac1resetReboot.png
|
|
Attachment 2: c1Vac1&2down.jpg
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|
10597
|
Fri Oct 10 14:41:04 2014 |
Steve | Update | VAC | Power outage II & recovery |
Quote: |
Quote: |
Quote: |
Post 30-40min unexpected power outage this morning, Steve checked the status of the vacuum and I powered up Chiara.
I brought back the FE machines and keyed all the crates to bring back the slow machines but for the vac computers.
c1vac1 is not responding as of now. All other computers have come back and are alive.
|
IFO vacuum, air condition and PMC HV are still down. PSL out put beam is blocked on the table.
|
We are pumping again. This is a temporary configuration. The annuloses are at atmosphere. The reset reboot of c1Vac1 and 2 opened everything except the valves that were disconnected.
TP2 lost it's vent solenoid power supply and dry pump during the power outage.
They were replaced but the new small turbo controller is not set up as the old TP2 was so it does not allow V4 to open.
Tomorrow I will swap back the old controller, pump down the annuloses and close off the ion pumps.
I removed the beam block from the PSL table and opened the shutter. CC4 has the real pressure 2e-5 Torr
CC1 is not real.
|
Tp2 is controlled by old controller. Annuloses pumped down. Valve configuration: "vacuum normal "
Ion pumps closed at <1e-4 mT |
Attachment 1: recovery_poweroutage.png
|
|
10599
|
Mon Oct 13 14:44:52 2014 |
Steve | Update | VAC | RGA scan pd78 -day 13 |
Our first RGA scan since May 27, 2014 elog10585
The Rga is still warming up. It was turned on 3 days ago as we recovered from the second power outage.
|
Attachment 1: RGAscan13Oct2014.png
|
|
10658
|
Fri Oct 31 15:34:47 2014 |
Steve | Update | PSL | PSL HEPAs are running again |
Quote: |
The PSL HEPA stopped working while it was running at 80%. I have closed the PSL enclosure.
Steve is working to fix this.
|
The Variac burned out and it was replaced. Each unit was checked out individually. HEPA -north is still noisy at full speed. |
Attachment 1: HepaVariac.jpg
|
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10677
|
Thu Nov 6 10:18:12 2014 |
Steve | Update | General | fiber insulation in cable tray |
Quote: |
[Steve, Diego, Manasa]
Since the beatnotes have disappeared, I am taking this as a chance to put the FOL setup together hoping it might help us find them.
Two 70m long fibers now run along the length of the Y arm and reach the PSL table.
The fibers are running through armaflex insulating tubes on the cable racks. The excess length ~6m sits in its spool on the top of the PSL table enclosure.
Both the fibers were tested OK using the fiber fault locator. We had to remove the coupled end of the fiber from the mount and put it back in the process. So there is only 8mW of end laser power at the PSL table after this activity as opposed to ~13mW. This will be recovered with some alignment tweaking.
After the activity I found that the ETMY wouldn't damp. I traced the problem to the ETMY SUS model not running in c1iscey. Restarting the models in c1iscey solved the problem.
|
AP Armaflex tube 7/8" ID X 1" wall insulation for the long fiber in wall mounted cable trays installed yesterday.
The 6 ft long sections are not glued. Cable tied into the tray pressed against one an other, so they are air tight. This will allow us adding more fibers later.
Atm2: Fiber PSL ends protection added on Friday.
|
Attachment 1: APT07810.jpg
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Attachment 2: fromYend.jpg
|
|
10678
|
Thu Nov 6 11:40:58 2014 |
Steve | Update | General | He/Ne telescope |
Liyuan is measuring the He/Ne telescopes in the Y arm between the tube and CES wall. He'll be here till 1pm |
10684
|
Fri Nov 7 10:29:56 2014 |
Steve | Update | General | He/Ne telescope |
Quote: |
Liyuan is measuring the He/Ne telescopes in the Y arm between the tube and CES wall. He'll be here till 1pm
|
Liyuan is continuing his measurement in the Y arm till noon today. |
10691
|
Mon Nov 10 07:36:35 2014 |
Steve | Update | SUS | PRM damping recovered |
PRM sus damping recovered and PMC locked. |
10714
|
Fri Nov 14 08:25:29 2014 |
Steve | Update | SUS | morning issues |
PRM, SRM and the ENDs are kicking up. Computers are down. PMC slider is stuck at low voltage. |
Attachment 1: morning.png
|
|
10716
|
Fri Nov 14 15:26:45 2014 |
Steve | Update | safety | Diego gets safety traning |
Diego Bersanetti received 40m specific safety training today. |
10738
|
Mon Dec 1 07:30:29 2014 |
Steve | Update | SUS | ETMX damping restored |
ETMX sus damping restored and PMC locked manually. |
10739
|
Mon Dec 1 15:41:38 2014 |
Steve | Update | General | X end fiber insulated and on cable tray |
Quote: |
Quote: |
Quote: |
[Steve, Diego, Manasa]
Since the beatnotes have disappeared, I am taking this as a chance to put the FOL setup together hoping it might help us find them.
Two 70m long fibers now run along the length of the Y arm and reach the PSL table.
The fibers are running through armaflex insulating tubes on the cable racks. The excess length ~6m sits in its spool on the top of the PSL table enclosure.
Both the fibers were tested OK using the fiber fault locator. We had to remove the coupled end of the fiber from the mount and put it back in the process. So there is only 8mW of end laser power at the PSL table after this activity as opposed to ~13mW. This will be recovered with some alignment tweaking.
After the activity I found that the ETMY wouldn't damp. I traced the problem to the ETMY SUS model not running in c1iscey. Restarting the models in c1iscey solved the problem.
|
AP Armaflex tube 7/8" ID X 1" wall insulation for the long fiber in wall mounted cable trays installed yesterday.
The 6 ft long sections are not glued. Cable tied into the tray pressed against one an other, so they are air tight. This will allow us adding more fibers later.
Atm2: Fiber PSL ends protection added on Friday.
|
[Steve, Manasa]
Two 70m long fibers are now running through armaflex insulating tubes along the X arm on the cable racks. The excess length of the fiber sits in its spool on top of the PSL enclosure.
Fibers were checked after this with the fiber fault locator (red laser) and found OK.
|
X-arm AP Armaflex tube insulation is cable tightened into cable tray. Only turning 6 ft sections are taped together.
Remaining things to do: install ends protection tubing |
10741
|
Mon Dec 1 17:13:57 2014 |
Steve | Update | VAC | RGA scan pd78 -day 63 |
Quote: |
Our first RGA scan since May 27, 2014 elog10585
The Rga is still warming up. It was turned on 3 days ago as we recovered from the second power outage.
|
|
Attachment 1: RGAscanD63.png
|
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10750
|
Wed Dec 3 08:36:49 2014 |
Steve | Update | LSC | good IFO status |
|
Attachment 1: goodStatus.png
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10781
|
Thu Dec 11 15:40:04 2014 |
Steve | Update | safety | safety training |
Katherine Dooley has received 40m specific basic safety training in the 40m lab |
10790
|
Fri Dec 12 10:38:22 2014 |
Steve | Update | PEM | leaky roof |
The first real rain of this year finds only one leak at the 40m |
Attachment 1: leakyroof.jpg
|
|
10837
|
Tue Dec 23 14:33:24 2014 |
Steve | Update | VAC | Chiara gets UPS |
Quote: |
Quote: |
We had an unexpected power shutdown for 5 sec at ~ 9:15 AM.
Chiara had to be powered up and am in the process of getting everything else back up again.
Steve checked the vacuum and everything looks fine with the vacuum system.
|
PSL Innolight laser and the 3 units of IFO air conditions turned on.
The vacuum system reaction to losing power: V1 closed and Maglev shut down. Maglev is running on 220VAC so it is not connected to VAC-UPS. V1 interlock was triggered by Maglev "failure" message.
Maglev was reset and started. After Chiara was turned on manually I could bring up the vac control screen through Nodus and opened V1
"Vacuum Normal" valve configuration was recovered instantly.
Chiara needs UPS
It is arriving Thursday
|
EricQ and Steve,
Steve preset the vacuum for safe-reboot mode with C1vac1 and C1vac2 running normal: closed valves as shown, stopped Maglev & disconnected valves V1 plus valves with moving labels.
(The position indicator of the valves changes to " moving " when its cable disconnected )
Eric shut down Chiara, installed APC's UPS Pro 1000 and restarted it.
All went well. Nothing unexpected happened. So we can conclude that the vacuum system with running C1vac1 and C1vac2 is not effected by Chiara's losing AC power. |
Attachment 1: prepUP.png
|
|
10838
|
Tue Dec 23 15:37:32 2014 |
Steve | Update | VAC | TP3 drypump replaced |
Quote: |
Quote: |
TP2's fore line - dry pump replaced at performance level 600 mTorr after 10,377 hrs of continuous operation.
Where are the foreline pressure gauges? These values are not on the vac.medm screen.
The new tip seal dry pump lowered the small turbo foreline pressure 10x
TP2fl after 2 day of pumping 65mTorr
|
TP2 dry pump replaced at fore pump pressure 1 Torr, TP2 50K_rpm 0.34A
Top seal life 6,362 hrs
New seal performance at 1 hr 36 mTorr,
Maglev at 560 Hz, cc1 6e-6 Torr
|
TP3 dry pump replaced at 540 mT as TP3 50K_rpm 0.3A with annulos load. It's top seal life time was 11,252 hrs
|
10843
|
Fri Dec 26 17:45:21 2014 |
Steve | Update | VAC | vac pressure rose to 1.3 mTorr |
We run out of N2 for the vacuum system. The pressure peaked at 1.3 mTorr with MC locked. V1 did not closed because the N2 pressure sensor failed.
We are back to vac normal. I will be here tomorrow to check on things. |
Attachment 1: noN2.png
|
|
Attachment 2: backtoVacNormal.png
|
|
10845
|
Sun Dec 28 07:29:16 2014 |
Steve | Update | VAC | vacuum is normal |
Quote: |
We run out of N2 for the vacuum system. The pressure peaked at 1.3 mTorr with MC locked. V1 did not closed because the N2 pressure sensor failed.
We are back to vac normal. I will be here tomorrow to check on things.
|
ITMX damping restored. |
Attachment 1: 3d.png
|
|
10850
|
Sun Jan 4 12:49:18 2015 |
Steve | Update | SUS | recent earthquakes |
All suspensions were tripped. Damping were restored. No obvious sign of damage. BS OSEM-UR may be sticking ? |
Attachment 1: recentEQ.png
|
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10858
|
Tue Jan 6 10:04:39 2015 |
Steve | Update | IOO | happy IOO |
|
Attachment 1: IOO.png
|
|
10865
|
Wed Jan 7 11:20:22 2015 |
Steve | Update | LSC | X arm T-QPD gets SM1 thread adapter |
C1:SUS-ETMX_QPD is removed and internal SM1 thread adapter epoxied into position as it is at the Y end
This adapter will take FL1064-10 line filter holder
Line filter is attached and qpd needs alignment. |