| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
1220
|
Fri Jan 9 16:52:18 2009 |
steve | Update | VAC | tp3 forline pump replaced | Alberto took 40m vacuum 101 class as we replaced
the drypump at the annulus pump line.
|
|
|
1226
|
Wed Jan 14 09:22:43 2009 |
steve | HowTo | VAC | N2 supply pressure lowered for vac valves | [quote]I've been replacing the N2 bottles
recently.
I noticed that the consumption is too high. |
|
|
1227
|
Wed Jan 14 10:59:06 2009 |
steve | Bureaucracy | VAC | rga waiting to be "connected" | We have no RGA data since old Dycor passed
away in the middle of Oct, 2008
New SRS-RGA200 was installed on the vac envelope |
|
|
1253
|
Mon Jan 26 14:51:54 2009 |
josephb | Configuration | VAC | | We need a new RS-232 to Ethernet bridge in
order to interface properly with the new
RGA. The RGA has a fixed baud rate of 28.8k, |
|
|
1448
|
Wed Apr 1 10:22:13 2009 |
steve | Update | VAC | RGA logging is working | Thanks to Joe B who made the SRS RGA working
with linux
Last data file logged at 2008 Oct |
|
|
1452
|
Fri Apr 3 10:01:50 2009 |
steve | Update | VAC | rgascan with temp plot | Rga scan of day 231 since pumpdown pd66-m-d231
m stands for maglev pumping speed,
vacuum normal condition of valves, |
|
|
1459
|
Wed Apr 8 09:36:20 2009 |
steve | Configuration | VAC | valve condition changed to BG to calibrate the RGA | Vacuum
normal valve condition was changed to accommodate
SRS-RGA calibration. |
|
|
1462
|
Thu Apr 9 11:27:19 2009 |
steve | Update | VAC | vac gauge reading problem | Cold cathode gauge CC4 is reading
normal.
CC1 is glitching, it is probably |
|
|
1486
|
Wed Apr 15 11:25:21 2009 |
steve | Configuration | VAC | RGA cal completed |
|
|
|
1505
|
Mon Apr 20 23:27:59 2009 |
rana | Summary | VAC | c1vac2 rebooted: non-functional for several months | We found several problems with the framebuilder
tonight. The first symptom was that it was
totally out of
|
|
|
1506
|
Tue Apr 21 18:18:27 2009 |
steve | Update | VAC | maglev failed | Our Osaka TG360MB maglev failed with CSB
error message. This means that the dry emergency
landing bearing has to be replaced. |
|
|
1507
|
Wed Apr 22 11:16:26 2009 |
steve | Configuration | VAC | Cryo pump is ON and the Maglev is dead | The
CRYO pump cooled down and VC1 was opened.
This |
|
|
1511
|
Thu Apr 23 16:38:33 2009 |
steve | Update | VAC | vac valve relay box is shorting | Ben and I found this vacuum valve relay
box intermittently shorthing yesterday.
It effects V4, V5, VA6 and VM1........ |
|
|
1517
|
Fri Apr 24 16:02:31 2009 |
steve | HowTo | VAC | cryo pump interlock rule | I tested the cryopump interlock today.
It is touchy. I do not have full confidence
in it. |
|
|
1518
|
Fri Apr 24 16:24:25 2009 |
rob | Omnistructure | VAC | Paschen | In response to Steve's elog entry, and
for 40m posterity, I provide the Paschen
Curve. |
|
|
1520
|
Sat Apr 25 00:45:31 2009 |
Yoichi | Configuration | VAC | Reflector for the cryopump temperature monitor changed | The temperature of the cryopump head is monitored
by a photo switch looking at an aluminum
foil reflector attached to the needle of |
|
|
1521
|
Sat Apr 25 02:54:25 2009 |
Yoichi | Configuration | VAC | Reflector for the cryopump temperature monitor changed | [quote]The temperature of the cryopump head
is monitored by a photo switch looking at
an aluminum foil reflector attached to the |
|
|
1524
|
Mon Apr 27 18:31:44 2009 |
steve | Configuration | VAC | VC1 closed | CC1 5e-7 Torr, VC1 closed at 18:25,
IFO is not pumped, RGA is in bg-mode
|
|
|
1525
|
Tue Apr 28 01:48:45 2009 |
pete | Configuration | VAC | VC1 open | At about 1am or so Yoichi and I opened
VC1. CC1 had fallen to about 5e-5 torr. |
|
|
1527
|
Tue Apr 28 09:27:32 2009 |
steve | Configuration | VAC | cryopump deserves some credit | Congratulation Yoichi and Peter for full
rf locking at night. Let's remember that
the cryopump was shaking the hole vac envelope |
|
|
1532
|
Wed Apr 29 10:20:14 2009 |
steve | HowTo | VAC | cryo pump interlock rule is waved |
|
|
|
1552
|
Wed May 6 19:04:11 2009 |
rana | Summary | VAC | vac images | Since there's no documentation on this besides
Steve's paper notebooks...
|
|
|
1553
|
Thu May 7 10:28:20 2009 |
steve | Update | VAC | retrofitted maglev's needs |
Our spare Osaka maglev purchased
in Oct 2005 turned out to be having a viton |
|
|
1572
|
Sun May 10 13:41:17 2009 |
steve | Update | VAC | ETMY damping restored, VC1 opened | ETMY damping restored.
Cryo interlock closed VC1 ~2
days ago. P1 is 6.3 mTorr. Cryo temp 12K |
|
|
1593
|
Sun May 17 14:35:52 2009 |
Yoichi | Update | VAC | VC1 opened | I found the VC1 was closed and the pressure
was 4.5e-3 torr.
I tweaked the optical sensor (cryopump temperature), |
|
|
1601
|
Mon May 18 19:44:52 2009 |
rana, steve | Configuration | VAC | Cryo Pump turned off and valved off: 1 beer can only | I was seeing some excess noise in the ETMY
oplev yaw and so we turned off the cryo and
restarted c1vac2 to get the turbo pump channels |
|
|
1602
|
Mon May 18 20:16:20 2009 |
rana | Configuration | VAC | not it | There was essentially no change in the ETMY
oplev spectrum with the cryo off!
|
|
|
1604
|
Tue May 19 09:34:29 2009 |
steve | Configuration | VAC | IFO is not pumped & CRYO is being regenerated | Morning Vacuum condition: IFO is not being
pumped, P1 pressure is 1.8 mTorr and rising
(see P1 pressure plot of 100 min ).
|
|
|
1609
|
Tue May 19 16:18:45 2009 |
steve | Configuration | VAC | IFO pressure is 4.2e-7 Torr with CRYO pump | [quote]Morning Vacuum condition: IFO is not
being pumped, P1 pressure is 1.8 mTorr and
rising (see P1 pressure plot of 100 min ).
|
|
|
1610
|
Wed May 20 01:41:19 2009 |
pete | Update | VAC | cryopump probably not it | I found some neat signal analysis software
for my mac (http://www.faberacoustical.com/products/),
and took a spectrum of the ambient noise |
|
|
1671
|
Fri Jun 12 09:56:38 2009 |
steve | Configuration | VAC | new maglev installed | Joe and Steve
The retrofitted Osaka 390 was installed |
|
|
1672
|
Fri Jun 12 15:34:49 2009 |
steve | Configuration | VAC | maglev is running |
|
|
|
1673
|
Mon Jun 15 15:17:33 2009 |
josephb, Steve | Configuration | VAC | Vacuum control and monitor screens | We updated the vacuum control and monitor
screens (C0VAC_MONITOR.adl and C0VAC_CONTROL.adl).
We also updated the /cvs/cds/caltech/target/c1vac1/Vac.db |
|
|
1674
|
Mon Jun 15 16:31:36 2009 |
steve | Configuration | VAC | RGA is scanning new Maglev |
|
|
|
1677
|
Tue Jun 16 09:02:30 2009 |
steve | Configuration | VAC | new maglev RGA scan | The maglev fore line pressure is 3e-6 torr
at CC2 after 4 days of pumping. Varian turbo
V-70 is pumping on it through V4 and VM2 |
|
|
1690
|
Tue Jun 23 10:06:03 2009 |
steve | Update | VAC | new maglev RGA scan at day6 | The Maglev is running for 10 days with
V1 closed. The pressure at the RGA-region
is at 2e-9 torr on CC4 cold cathode |
|
|
1691
|
Tue Jun 23 15:19:42 2009 |
steve | Configuration | VAC | V1 is open |
|
|
|
1693
|
Wed Jun 24 09:21:19 2009 |
steve | Configuration | VAC | IFO RGA scan with Maglev & Cryo |
|
|
|
1701
|
Thu Jun 25 10:28:58 2009 |
steve | HowTo | VAC | Cryopump is regenerated | The Cryopump's VC1 valve to IFO was closed
yesterday.
The compressor
Helium pressure was 235 PSI. The cold head |
|
|
1716
|
Thu Jul 2 17:37:36 2009 |
steve | Update | VAC | V1 interlock test | Joe, Alberto and Steve
We tested gate valve V1 interlock
by : |
|
|
1763
|
Mon Jul 20 10:35:06 2009 |
steve | Update | VAC | UPS batteries replaced | APC Smart-UPS (uninterruptible power
supply) batteries RBC12 replaced at 1Y8 vacuum
rack. |
|
|
1840
|
Thu Aug 6 09:05:29 2009 |
steve | Update | VAC | large O-rings of vacuum envelope | The 40m-IFO vacuum envelope doors are sealed
with dual viton O-rings and they are pumped
through the annulos lines. |
|
|
1852
|
Fri Aug 7 09:50:57 2009 |
steve | Configuration | VAC | IFO pressure rose to 2.3 mTorr | IFO pressure was 2.3 mTorr this morning,
The Maglev's foreline valve
V4 was closed so P2 rose to 4 Torr. The Maglev |
|
|
1857
|
Fri Aug 7 16:11:11 2009 |
steve, rob | Configuration | VAC | IFO pressure rose to 2.3 mTorr |
|
|
|
1858
|
Fri Aug 7 16:14:57 2009 |
rob | Omnistructure | VAC | UPS failed | Steve, Rana, Ben, Jenne, Alberto, Rob
UPS in the vacuum rack failed this |
|
|
1863
|
Fri Aug 7 18:06:24 2009 |
rob | Omnistructure | VAC | opening V1 when PTP1 is broken | We've had a devil of a time getting V1
to open, due to the Interlock code.
|
|
|
1864
|
Fri Aug 7 19:34:40 2009 |
steve | Summary | VAC | UPS failed | The Maglev is running on single phase 220V
and that voltage was not interrupted.
TP1 was running undisturbed with V1 and V4 |
|
|
1865
|
Fri Aug 7 19:55:08 2009 |
steve | Summary | VAC | opening V1 when PTP1 is broken | The swapped in 307 convectron gauge controller
is very likely to have the RS232 connection
wired differently from the old one. |
|
|
1912
|
Sat Aug 15 18:57:48 2009 |
rana | Update | VAC | UPS failed | As Rob noted last Friday, the UPS which
powers the Vacuum rack failed. When we were
trying to move the plugs around to debug |
|
|
1937
|
Mon Aug 24 16:48:57 2009 |
steve | HowTo | VAC | new UPS installed |
|
|