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ID	Date	Author	Type	Category	Subject	Text
6187	Thu Jan 12 03:05:02 2012	kiwamu	Update	LSC	OSA installed in AS	[John / Valera / Kiwamu] We installed a new weapon, an optical spectrum
6202	Tue Jan 17 01:02:07 2012	kiwamu	Update	LSC	glitch hunting in REFL RFPDs : strange	A very strange thing is going on.
6203	Tue Jan 17 02:27:49 2012	kiwamu	Update	LSC	fringe tests : all the suspensions are innocent	I did a quick test to check a hypothesis that PRM is interfering with some other optics in the single bounce configuration.
6204	Tue Jan 17 02:44:59 2012	kiwamu	Update	CDS	awg not working	AWG is not working. This needs to be fixed.
6205	Tue Jan 17 03:10:27 2012	kiwamu	Configuration	IOO	rotated lambda/2 plate	I have slightly rotated the lambda/2 plate, which is used for attenuating the REFL beam's power on the AS table
6206	Tue Jan 17 13:47:40 2012	kiwamu	Update	LSC	dirty steering mirror in the REFL path	Last night I found that there were many dust particles on the second steering mirror in the REFL
6207	Tue Jan 17 16:09:20 2012	kiwamu	Update	CDS	awg not working on the c1sus machine	Actually awg works fine without any problems when the excitation channels belong to the c1lsc machine.
6209	Wed Jan 18 12:36:26 2012	kiwamu	Update	LSC	wiped a steering mirror on the REFL path	I wiped both surfaces of the REFL second steering mirror.
6211	Wed Jan 18 14:28:36 2012	kiwamu	Update	LSC	estimation of optical length between PRM and scattering object	Assuming that PRM is interfering with some other optics, I have estimated the optical distance between
6212	Wed Jan 18 16:31:10 2012	kiwamu	Update	LSC	estimation of optical length between PRM and scattering object	I searched for a scattering body in the REFL path.
6213	Thu Jan 19 23:34:52 2012	kiwamu	Update	IOO	PMC realignment and HEPA	I realigned the incident beam to PMC at 23:30. The transmitted light went up from 0.78 to 0.83.
6214	Fri Jan 20 15:59:02 2012	kiwamu	Update	Green Locking	Y arm ALS noige budget	One of my goals in this week is : measurement of
6215	Fri Jan 20 16:24:50 2012	kiwamu	Update	Green Locking	Y arm ALS : time series	Here is a new time series plot showing how stably
6218	Mon Jan 23 23:12:00 2012	kiwamu	Update	IOO	PMC realignment	I have realigned the beam pointing to PMC. The transmitted light increased from 0.74 to 0.83.
6220	Tue Jan 24 18:11:13 2012	kiwamu	Update	Green Locking	Y arm ALS noise budget	I did some more stuff for the Y arm ALS and updated the noise budget:
6221	Wed Jan 25 02:59:46 2012	kiwamu	Update	Green Locking	Y arm ALS noise budget	Surprisingly increasing the gain of the whitening filter didn't improve the noise curve.
6224	Thu Jan 26 05:40:10 2012	kiwamu	Update	LSC	glitch in the analog demodulated signals	Indeed the glitches show up in the analog demodulated signals. So it is not an issue of the digital
6225	Thu Jan 26 06:09:52 2012	kiwamu	Update	Green Locking	noisy AS55	During the Y arm ALS I found that the noise of the AS55 demod signal was worse than that of
6229	Thu Jan 26 19:28:02 2012	kiwamu	Update	IOO	PMC low transmission	After I recovered the lock of PMC, I found that the PMC transmission was quite low. It was about 0.26 in the EPICS display.
6230	Fri Jan 27 05:21:43 2012	kiwamu	Update	Green Locking	fine alignment of the Y end green setup	I did a fine alignment on the Y end green setup. The green light became able to be locked again.
6231	Fri Jan 27 06:07:47 2012	kiwamu	Update	LSC	glitch hunting	I went through various IFO configurations to see if there are glitches
6235	Fri Jan 27 17:16:05 2012	kiwamu	Update	LSC	hypothetical glitch scenario	Here is a hypothetical scenario which could make the glitches in the LSC error signals. It can be considered as a
6238	Mon Jan 30 23:10:02 2012	kiwamu	Update	SUS	drift mon script needs to be fixed	[Rana / Kiwamu] We tried to set some parameters for the suspension drift monitor but the old
6240	Tue Jan 31 14:58:30 2012	kiwamu	Update	IOO	laser shuts down	[Steve/ Kiwamu] We found that the laser had completely shut off for ~ 4 hours even with
6266	Fri Feb 10 02:35:29 2012	kiwamu	Update	IOO	crazy ground motion	I gave up tonight's locking activity because the MC can't stay locked.
6274	Fri Feb 10 23:19:09 2012	kiwamu	Update	IOO	cross talk causing fake seimometer signals	[ Koji / Kiwamu ] The
6281	Wed Feb 15 05:29:22 2012	kiwamu	Update	LSC	sensing matrix of PRMI	I have measured the sensing matrix of PRMI. It seems that the MICH signal in the 3f ports
6283	Wed Feb 15 17:15:33 2012	kiwamu	Update	LSC	sensing matrix of PRMI	I think I have told a lie in the last meeting -- the measured sensing matrix doesn't look
6284	Thu Feb 16 03:47:16 2012	kiwamu	Update	LSC	glitch table	I updated the table which I posted some time ago (#6231). The latest table is shown below.
6285	Thu Feb 16 04:02:16 2012	kiwamu	Update	LSC	insane REFL165 DC output	I found that the DC monitor of the REFL165 was showing 9 V regardless of how much laser
6286	Thu Feb 16 04:29:30 2012	kiwamu	Update	LSC	upconversion noise from BS motion	Sometimes ago I reported that there have been a kind of upconversion noise when PRM was excited (#6211).
6291	Thu Feb 16 23:12:55 2012	kiwamu	Update	IOO	MC unlocking frequently	The MC became crazy again. It seems that there were corresponding
6292	Fri Feb 17 01:02:22 2012	kiwamu	Update	IOO	MC is back to normal	[Koji / Kiwamu] The MC is now back to normal. The beam pointing
6293	Fri Feb 17 04:45:48 2012	kiwamu	Update	LSC	sensing matrix of PRMI	I locked the PRMI with the AS55I and Q combination.
6295	Sat Feb 18 16:58:59 2012	kiwamu	Update	IOO	MC suspension realigned	[ Den / Kiwamu] We have realigned the MC suspensions so that
6298	Tue Feb 21 04:30:02 2012	kiwamu	Update	LSC	Y arm + PRMI	I tried the "Yarm + PRMI" configuration to see what happens.
6300	Tue Feb 21 16:10:29 2012	kiwamu	Update	IOO	degradation in input PZT1	PZT1, the one with Koji's custom mid-HV driver (#5447
6301	Tue Feb 21 18:39:11 2012	kiwamu	Update	Green Locking	New BBPDs installed	Two new BBPDs have been installed on the PSL table. The first one was installed by Koji
6303	Wed Feb 22 01:53:57 2012	kiwamu	Update	LSC	update on glitch table	I tried SRMI. The glitch rate wasn't as high as that of PRMI but it happened once per
6304	Wed Feb 22 13:28:22 2012	kiwamu	Update	LSC	Y arm + central part locking	Last night I tried the "Y arm + central part" locking again. Three
6306	Wed Feb 22 19:45:33 2012	kiwamu	Update	LSC	how much length offset do we need ?	I did a quick calculation to see if the offset of the arm length which I tried last night
6310	Fri Feb 24 03:58:13 2012	kiwamu	Update	LSC	Y arm + PRMI part II	I tried the Yarm + PRMI configuration again.
6311	Fri Feb 24 04:12:44 2012	kiwamu	Update	SUS	freeswing test	The following optics were kicked: MC1 MC2 MC3 ETMX ETMY ITMX ITMY PRM SRM BS Fri Feb 24 04:11:15 PST 2012 1014120690
6313	Fri Feb 24 15:01:31 2012	kiwamu	Update	LSC	Y arm + PRMI part II	The figure below shows the time series of the Y arm + PRMI trail.
6317	Fri Feb 24 19:18:28 2012	kiwamu	Update	LSC	Y arm + PRMI : how they should look like	I calculated how the DC signals should look like in the Y arm PRMI configuration.
6319	Fri Feb 24 23:14:09 2012	kiwamu	Update	CDS	tdsavg went crazy	I found that the LSCoffset script didn't work today. The script is supposed to null the electrical offsets in all the LSC channels.
6320	Sat Feb 25 00:37:42 2012	kiwamu	Update	SUS	oplev spectra during PRMI lock	Somehow the angular stability of the central part have not been so great.
6321	Sat Feb 25 14:27:26 2012	kiwamu	Update	LSC	glitches in the RFPD outputs	Last night I took a closer look at the LSC analog signals to find which components are making
6330	Tue Feb 28 12:00:54 2012	kiwamu	Update	LSC	installed anti-whitening filters	I found that none of the filter banks in the LSC input signals have the precise anti-whitening
6331	Tue Feb 28 15:48:32 2012	kiwamu	Update	LSC	installed anti-whitening filters	I installed the rest of the precise anti-whitening filters. Now all of the LSC sensors have the right filters.

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