ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
1515
|
Fri Apr 24 04:38:49 2009 |
Yoichi | Update | Locking | DARM demod phase | [quote]Tonight, I was able to go up to arm
power = 40 by tweaking the DARM demodulation
phase.
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|
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1516
|
Fri Apr 24 11:34:32 2009 |
rob | Update | Locking | DARM demod phase | [quote][quote]Tonight, I was able to go up
to arm power = 40 by tweaking the DARM demodulation
phase.
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|
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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. |
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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. |
|
|
1519
|
Fri Apr 24 17:26:57 2009 |
Yoichi | Update | Locking | DARM demod phase | [quote]
There's actually code in place in the LSC
to dynamically adjust the demod phase for |
|
|
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 |
|
|
1522
|
Sat Apr 25 03:27:34 2009 |
Yoichi | Update | Locking | Locking status | Yoichi, Peter,
We are working on the final step of the lock |
|
|
1523
|
Sun Apr 26 02:13:18 2009 |
Yoichi | Update | Locking | Two more successes of RF CARM handoff | Tonight, the RF CARM hand off (mostly) succeeded
twice.
But still, the IFO lost lock when I reduced |
|
|
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
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|
|
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. |
|
|
1526
|
Tue Apr 28 04:30:16 2009 |
Yoichi | Update | Locking | RF full lock | Yoichi, Peter
I believe we have succeeded in the full lock |
|
|
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 |
|
|
1528
|
Tue Apr 28 12:55:57 2009 |
Caryn | DAQ | PEM | Unplugged Guralp channels | For the purpose of testing out the temperature
sensors, I stole the PEM-SEIS_MC1X,Y,Z channels.
I unplugged Guralp NS1b, Guralp Vert1b, |
|
|
1529
|
Tue Apr 28 16:36:24 2009 |
rob | HowTo | Locking | setting the RF CARM demod phase | To set the demod phase for RF CARM, sensed
at REFL2 (REFL 166I), it suffices to set
the demod phase for REFL2 to be the optimal |
|
|
1530
|
Tue Apr 28 17:51:13 2009 |
rob | HowTo | Locking | setting the RF CARM demod phase |
|
|
|
1531
|
Wed Apr 29 04:03:51 2009 |
Yoichi | Update | Locking | CARM RF changed to REFL_2I | Yoichi, Peter
As Rob suggested, the optimal demodulation |
|
|
1532
|
Wed Apr 29 10:20:14 2009 |
steve | HowTo | VAC | cryo pump interlock rule is waved |
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|
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1533
|
Wed Apr 29 15:56:43 2009 |
rob | Update | Locking | effect of SRCL detune on ARM powers in a CARM sweep | With no DARM offset, sweeping CARM shows
an asymmetry between the state where we lock
to a DARM spring and the state with a DARM |
|
|
1534
|
Thu Apr 30 05:49:06 2009 |
Yoichi | Update | Locking | 166MHz LO phase changed | In order to optimize the REFL_2I demod phase,
I changed the delay line setting for the
166MHz LO.
|
|
|
1535
|
Thu Apr 30 15:10:54 2009 |
rob | Update | Locking | CARM RF changed to REFL_2I | [quote]Yoichi, Peter
As Rob suggested, the optimal demodulation |
|
|
1536
|
Fri May 1 01:32:43 2009 |
Yoichi | Update | Locking | 166MHz LO phase adjustment | I continued to adjust the REFL_2I demodulation
phase.
I first optimized the demod phase for SRCL |
|
|
1537
|
Fri May 1 10:04:10 2009 |
rob | Update | Locking | 166MHz LO phase adjustment | [quote]I continued to adjust the REFL_2I demodulation
phase.
I first optimized the demod phase for SRCL |
|
|
1538
|
Fri May 1 18:24:36 2009 |
Alberto | Summary | General | jitter of REFL beam ? | Some loud thinking.
For
the measurement of the length of the PRC,
I installed a fast photodiode in the path |
|
|
1539
|
Fri May 1 18:51:34 2009 |
Alberto | Summary | Environment | earthquake | Earthquake 4.4 Leo Carrillo Beach.
Some of the watchdogs tripped out. |
|
|
1540
|
Sat May 2 16:34:31 2009 |
caryn | DAQ | PEM | Guralp channels plugged back in | I plugged the Guralp cables back into the
PEM ADCU
|
|
|
1541
|
Sun May 3 22:48:12 2009 |
Yoichi | Update | Locking | Some measurements at the lock point | I attached some measurement results at when
the IFO is at the full lock point.
|
|
|
1542
|
Mon May 4 10:38:52 2009 |
steve | Update | MOPA | laser power is dropped | As PSL-126MOPA_DTEC went up, the power
out put went down yesterday |
|
|
1543
|
Mon May 4 16:49:56 2009 |
Alberto | Update | MOPA | laser power is dropped |
|
|
|
1544
|
Tue May 5 05:16:12 2009 |
Yoichi | Update | Locking | DC Readout and DARM response | Tonight, I was able to switch the DARM to
DC readout a couple of times.
But the lock was not as stable as the RF |
|
|
1545
|
Tue May 5 08:26:56 2009 |
rob | Update | Locking | DC Readout and DARM response | [quote]Tonight, I was able to switch the DARM
to DC readout a couple of times.
But the lock was not as stable as the RF |
|
|
1546
|
Tue May 5 09:22:46 2009 |
caryn | Update | PEM | zeros | For several of the channels on the PEM
ADCU, zeros are occuring at the same time.
Does anyone know why that might happen or |
|
|
1547
|
Tue May 5 10:42:18 2009 |
steve | Update | MOPA | laser power is back |
|
|
|
1548
|
Tue May 5 11:44:33 2009 |
rob | Update | Locking | DARM response |
Here's the RF DARM optical response, on the
anti-spring side, from optickle. Note that |
|
|
1549
|
Tue May 5 14:02:16 2009 |
rob | Update | LSC | DARM DC response varies with DARM offset | Note the effect of quadrature rotation
for small offsets. |
|
|
1550
|
Wed May 6 02:39:20 2009 |
Yoichi | HowTo | Locking | How to go to DC readout | I wrote a script called DC_readout, which
you can find in /cvs/cds/caltech/scripts/DRFPMI/bang/nospring/.
|
|
|
1551
|
Wed May 6 16:56:35 2009 |
rana, alex, joe | Configuration | Computers | daqd log, cront, etc. | While Alex came over, we investigated the
log file problems with DAQD and NDS on FB0.
There was a lot of
|
|
|
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...
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|
|
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 |
|
|
1554
|
Thu May 7 12:21:36 2009 |
josephb, alex | Configuration | Computers | fb40m | Having determined that Rana (the computer)
was having to many issues with testing the
new Raid array due to age of the system, |
|
|
1555
|
Thu May 7 15:22:19 2009 |
josephb, alberto | Configuration | Computers | fb40m |
|
|
|
1556
|
Thu May 7 17:59:23 2009 |
Alberto | Configuration | | MC WFS | This afternoon the MC could not get locked.
I
first checked the Osems values at the MC
mirrors and compared them to the trend of |
|
|
1557
|
Thu May 7 18:12:12 2009 |
pete | Update | Locking | arm power curve | I've plotted TRX, TRY, PD12I and PD11Q.
Arm powers after locking increase for a few
tens of minutes, peak out, and then decrease |
|
|
1558
|
Thu May 7 23:21:04 2009 |
pete | Update | Locking | arm power curve |
|
|
|
1559
|
Thu May 7 23:34:59 2009 |
rob | Update | SEI | seisBLRMS already lost | Can't find hostname 'fb40m'
it only lasted a few hours |
|
|
1560
|
Fri May 8 02:08:59 2009 |
pete | Update | Locking | lock stretches | locks last for about an hour. this
was true last night as well (see "arm
power curve" entries). the second |
|
|
1561
|
Fri May 8 02:39:02 2009 |
pete, rana | Update | Locking | crossover | attached plot shows MC_IN1/MC_IN2.
needs work.
This is supposed to be a measurement |
|
|
1562
|
Fri May 8 04:31:35 2009 |
rana | Update | Computer Scripts / Programs | elog and NDS | In the middle of searching through the elog,
its stopped responding. So I followed the
Wiki instructions
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1563
|
Fri May 8 04:46:01 2009 |
rana, yoichi | Summary | oplevs | BS/PRM/SRM table bad! | We went to center the oplevs because they
were far off and found that (as usual) the
numbers changed
|
|
|
1564
|
Fri May 8 10:05:40 2009 |
Alan | Omnistructure | Computers | Restarted backup since fb40m was rebooted | Restarted backup since fb40m was rebooted. |
|