| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
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.
|
|
|
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 |
|
|
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 |
|
|
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/.
|
|
|
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 |
|
|
|
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 |
|
|
1565
|
Fri May 8 15:40:44 2009 |
pete | Update | Locking | progressively weaker locks | the align script was run after the third
lock here. it would have been interesting
to see the arm powers in a 4th lock |
|
|
1585
|
Thu May 14 02:36:05 2009 |
pete | Update | Locking | unstable IFO | It seems that the MC3 problem is intermittent
(one-day trend attached). I tried to
take advantage of a "clean MC3" |
|
|
1611
|
Wed May 20 01:53:48 2009 |
rob, pete | Update | Locking | violin mode filters in drstep_bang | Recently the watch script was having difficulty
grabbing a lock for more than a few seconds.
Rob discovered that the violin notch filters |
|
|
1641
|
Tue Jun 2 02:28:58 2009 |
pete | Update | Locking | DD handoff work | alberto, pete
We worked on tuning the DD handoff |
|
|
1645
|
Wed Jun 3 03:22:16 2009 |
pete | Update | Locking | DD handoff | Rana, Alberto, Pete
We have the DD handoff nominally
working. Sometimes, increasing the |
|
|
1652
|
Thu Jun 4 16:54:19 2009 |
pete | Update | Locking | daytime DD handoff | I played with the DD handoff during the
day. The DRM dark port was flickering
like a candle flame in Dracula's castle. |
|
|
1654
|
Fri Jun 5 01:10:13 2009 |
rob, pete | Update | Locking | undermined | We were stymied early in the evening by
a surreptitiously placed, verbo-visually
obfuscated command in the drstep script. |
|
|
1655
|
Fri Jun 5 02:59:03 2009 |
pete, alberto | Update | Locking | tdsavg failure in cm_step script | the command
tdsavg 5 C1:LSC-PD4_DC_IN1
was causing grievous woe in the cm_step |
|
|
1656
|
Fri Jun 5 13:51:49 2009 |
rob | Update | Locking | tdsavg failure in cm_step script |
|
|
|
1658
|
Fri Jun 5 17:22:55 2009 |
pete | Update | Locking | daytime locking | After fixing the tp problem, I tried locking
again. Grabbing and DD handoff, no
problem. Died earlier than last night, |
|
|
1659
|
Sat Jun 6 01:44:53 2009 |
rob | Update | Locking | ? | Lock acquisition is proceeding smoothly
for the most part, but there is a very consistent
failure point near the end of the cm_step |
|
|
1660
|
Sun Jun 7 04:57:39 2009 |
Yoichi | Update | Locking | ? |
|
|
|
1663
|
Tue Jun 9 23:25:24 2009 |
rob | Update | Locking | ? |
|
|
|
1675
|
Tue Jun 16 02:09:31 2009 |
rob | Update | Locking | DD handoff finally working | I had trouble getting the SRC handoff from
SD to DD to work. I tried different
gains, flipping the PD7 & 8 demod phases |
|
|
1676
|
Tue Jun 16 03:43:04 2009 |
rob | Update | Locking | same troubles | Lock is still being lost, right at the
end of the process when trying to reduce
the CARM offset to zero. |
|
|
1678
|
Tue Jun 16 14:02:16 2009 |
rob | Update | Locking | locked | The IFO is locked, at the operating point
(zero CARM offset). The problem with
reducing the residual CARM offset in the |
|
|
1679
|
Tue Jun 16 16:10:01 2009 |
pete | Update | Locking | input matrix experiments | Last night Rob ran senseDRM and loadDRMImatrixData
and came up with the following for the input
matrix: |
|
|
1680
|
Tue Jun 16 17:38:35 2009 |
rob | Update | Locking | DeWhites ON | With the common mode servo bandwidth above
30kHz and the BOOST on (1), I was able to
switch on the test mass dewhitening. |
|
|
1684
|
Thu Jun 18 23:08:46 2009 |
rob | Update | Locking | spectrum | Here's a noise spectrum of the RSE interferometer,
in anti-spring mode, with RF readout.
I'd say the calibration is "loose." |
|
|
1709
|
Tue Jun 30 23:09:40 2009 |
Alberto | Update | Locking | chronicles of some locking attempts | Tonight I tried to lock the interferometer.
At the first attempts the arm power didn't
go above about 4. The mode cleaner seemed |
|
|
1742
|
Tue Jul 14 00:57:11 2009 |
Alberto | Update | Locking | photodiode alignment check | Since lately the alignment of the input
beam to the interferometer has changed, I
went checking the alignment of the beam on |
|
|
1747
|
Wed Jul 15 11:38:31 2009 |
rob | Update | Locking | MC_F channel dead | It's railed. This is what halted
locking progess on Monday night, as this
channel is used for the offloadMCF script, |
|
|
1749
|
Wed Jul 15 12:14:08 2009 |
Alberto | Update | Locking | photodiode alignment check |
|
|
|
1755
|
Thu Jul 16 01:00:56 2009 |
Alberto | Update | Locking | PD9 aligned |
|
|
|
1758
|
Thu Jul 16 14:41:38 2009 |
rob | Update | Locking | MC_F channel dead |
|
|
|
1759
|
Thu Jul 16 14:54:05 2009 |
rob | Update | Locking | MC_F channel dead |
|
|
|
1764
|
Mon Jul 20 12:35:21 2009 |
rob | Configuration | Locking | alignment biases funny | I found the alignment biases for the PRM
and the SRM in a funny state. It seemed
like they had been "saved" in badly |
|
|
1830
|
Tue Aug 4 23:03:56 2009 |
alberto | Update | Locking | IFO Alignment | After the mini boot fest that Jenne did
today, I checked whether that fixed the overflow
issues we yesterday prevented the alignemnt |
|
|
1833
|
Wed Aug 5 09:48:05 2009 |
alberto | Update | Locking | IFO Alignment |
|
|
|
1842
|
Thu Aug 6 09:33:08 2009 |
alberto | Update | Locking | FSS Transmitted and Reflected Power Trends | I've now also trended the MOPA output
power for the last 200 days to check a possible
correlation with the FSS reflected power. |
|
|
1843
|
Thu Aug 6 10:32:45 2009 |
alberto, rob | Update | Locking | More PSL trends: NPRO, MOPA, FSS, PMC and MZ | Here we trended also the PMC and
the MZ. The drop in the PMC happens at the
same rate as the MOPA's. |
|
|
1889
|
Wed Aug 12 02:00:32 2009 |
rob | Update | Locking | report | Spent a lot of time aligning tonight.
The BS is not staying put--sometimes after
a lock loss it gets badly mis-aligned. |
|
|
1909
|
Sat Aug 15 05:08:55 2009 |
Yoichi | Update | Locking | Friday night locking | Summary: DD hand off fails for DRFPMI.
Tonight, I did a lot of house keeping work.
|
|
|
1913
|
Sat Aug 15 22:50:18 2009 |
Clara | Update | Locking | Mode Cleaner is out of lock again | It was fine when I came in earlier today,
but I just got back from dinner, and it's
not good. I looked in dataviewer, and it |
|
|
1914
|
Sun Aug 16 04:33:11 2009 |
Clara | Update | Locking | Mode Cleaner is out of lock again |
|
|
|
1930
|
Wed Aug 19 23:57:35 2009 |
rob | Update | Locking | report |
locking work proceeding apace tonight.
diagonalized DRM with setDDphases |
|