ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
8103
|
Tue Feb 19 02:23:40 2013 |
yuta | Bureaucracy | General | action items for PRFPMI | These are things need to be done for demonstrating
PRFPMI using ALS.
All of these should be done before |
|
8105
|
Tue Feb 19 08:06:02 2013 |
yuta | Update | Electronics | POP path set up but AS55 is broken | I didn't use LED flash light. We learned
from the past (elog
#7355). I checked that POP55 and REFL55/165/33/11 |
|
8112
|
Tue Feb 19 19:55:52 2013 |
yuta | Update | IOO | MC yaw input tuned | [Jenne, Manasa, Yuta]
Since we levelled IMC stack, we had |
|
8114
|
Wed Feb 20 03:13:10 2013 |
yuta | Update | Alignment | clipping centering checklist | I attached clipping/centering checklist
for the alignment.
Blue |
|
8115
|
Wed Feb 20 10:13:41 2013 |
yuta | Update | Alignment | PRC flashing brighter than last week | After in-vac alignment work last night,
PRC is flashing brighter than PRMI alignment
last week. |
|
8119
|
Wed Feb 20 19:48:16 2013 |
yuta | Update | Alignment | BS table oplev re-arranged | [Sendhil, Yuta]
After aligning IFO and putting the |
|
8121
|
Wed Feb 20 20:15:29 2013 |
yuta | Update | Alignment | SRM oplev status | Currently, SRM is misaligned in pitch so
that SRM reflected beam hits on the top edge
of SR3 (not on the mirror, but on the cage |
|
8122
|
Wed Feb 20 20:58:37 2013 |
yuta | Update | Alignment | clipping centering checklist | Blue
ones are the ones we checked yesterday.
Green |
|
8124
|
Wed Feb 20 21:56:08 2013 |
yuta | Update | Alignment | clipping centering checklist | I'm not sure about the OMC situation at
40m. I think there are no direct beam reflected
back into IFO from OMC path. There must be |
|
8129
|
Thu Feb 21 15:21:07 2013 |
yuta | Update | VAC | all heavy doors on, started pumping down annulus | [Steve, Manasa, Jenne, Sendhil, Evan,
Yuta]
|
|
8141
|
Sat Feb 23 00:34:28 2013 |
yuta | Update | Computers | crontab in op340m deleted and restored (maybe) | I
accidentally overwrote crontab in op340m
with an empty file. |
|
8143
|
Sat Feb 23 07:14:58 2013 |
yuta | Update | LSC | can't lock Y arm | I tried to align and lock Y arm for the
first time after pumping.
But I couldn't lock Y arm for more |
|
8146
|
Sat Feb 23 15:26:26 2013 |
yuta | Update | Computers | crontab in op340m updated | I found some daily cron jobs for op340m
I missed last night. Also, I edited timings
of hourly jobs to maintain consistency with |
|
8150
|
Sat Feb 23 17:14:59 2013 |
yuta | Update | LSC | can't lock Y arm | Jenne found that;
0. If all mirrors are "aligned,"
Yarm flashes. |
|
8157
|
Mon Feb 25 15:30:29 2013 |
yuta | Update | Alignment | Y arm locked, both colors | [Koji, Yuta]
We aligned Y arm to Y green and tweaked |
|
8162
|
Mon Feb 25 21:25:14 2013 |
yuta | Update | Alignment | both arms locked in IR | [Jenne, Evan, Yuta]
After Y alignment, X arm is aligned |
|
8164
|
Mon Feb 25 22:42:32 2013 |
yuta | Summary | Alignment | current IFO situation | [Jenne,Yuta]
Both arms are aligned starting from |
|
8177
|
Wed Feb 27 01:09:53 2013 |
yuta | Update | Locking | PRMI sideband/carrier locked | [Jenne,Yuta]
We succeeded in locking PRMI in sideband |
6x |
8181
|
Wed Feb 27 11:22:54 2013 |
yuta | Update | Computers | backup crontab | I made a simple script to backup crontab
(/opt/rtcds/caltech/c1/scripts/crontab/backupCrontab).
|
|
8182
|
Wed Feb 27 11:59:43 2013 |
yuta | Update | SUS | PRM/BS coil re-balanced | I re-adjusted coil gains and f2a filters
for PRM and BS.
I'm not sure what happened to PRM |
 |
8196
|
Thu Feb 28 02:43:49 2013 |
yuta | Update | LSC | some qualitative evidence of PRMI sideband lock | [Manasa, Yuta]
Since we have setup POP22 PD now( |
|
8197
|
Thu Feb 28 03:25:27 2013 |
yuta | Update | LSC | PR gain ~ 25 from PRMI carrier lock | [Manasa, Yuta]
We locked PRMI in carrier. |
|
8199
|
Thu Feb 28 05:54:54 2013 |
yuta | Update | RF System | phase tracker: calibration | I swept the frequency of RF input to the
beatbox to calibrate and check linearity
range of phase tracker. |
 |
8200
|
Thu Feb 28 06:51:17 2013 |
yuta | Update | RF System | phase tracker: noise level | I measured noise level of the phase tracker
by inputting constant frequency RF signal
from marconi. |
|
8208
|
Fri Mar 1 16:58:37 2013 |
yuta | Update | LSC | Xarm oscillation stopped | POX11 oscillation at 630 Hz was stopped
by installing 630 Hz resonant gain to LSC_XARM.
After few hours, oscillation stopped. |
|
8212
|
Sat Mar 2 05:53:15 2013 |
yuta | Update | LSC | stable lock of PRMI | I tuned alignment, gains and filters to
achieve stable lock of PRMI.
It now locks quite stably with UGF |
  |
8214
|
Sat Mar 2 20:09:12 2013 |
yuta | Update | RF System | phase tracker: DAQ noise limited | [Koji, Yuta]
We found that our phase tracker noise |
|
8221
|
Mon Mar 4 16:46:31 2013 |
yuta | Update | SUS | oplev calibration for PRM | [Manasa, Sendhil, Yuta]
We calibrated oplev for PRM. Calibration |
 |
8222
|
Mon Mar 4 17:32:26 2013 |
yuta | Bureaucracy | General | flowchart for PRMI g-factor measurement | I made a very useful flowchart for the
week. Our goal for the week is to measure
g-factor of PRC in PRMI. |
|
8230
|
Tue Mar 5 06:27:14 2013 |
yuta | Update | LSC | intra-cavity power dependence on mirror misalignment | I measured intra-cavity power dependance
on mirror misalignment.
Intra-cavity |
   |
8232
|
Tue Mar 5 17:09:30 2013 |
yuta | Update | SUS | oplev calibration for ITMY | [Manasa, Sendhil, Yuta]
We calibrated oplev for ITMY. Calibration |
 |
8235
|
Tue Mar 5 23:00:08 2013 |
yuta | Update | LSC | Yarm and PRC g-factor from misalignment measurement | I fitted intra-cavity power dependance
on mirror misalignment plot with parabola
to get the g-factor. |
  |
8236
|
Tue Mar 5 23:37:11 2013 |
yuta | Update | SUS | PRM angular motion spectra | I measured PRM angular motion spectra (in
daytime today).
PRM angular motion is |
|
8248
|
Thu Mar 7 01:43:35 2013 |
yuta | Update | LSC | calibrated MI differential length spectra | Free swing MI differential length is 86 nm
RMS and residual length when locked |
 |
8252
|
Thu Mar 7 18:12:03 2013 |
yuta | Update | Alignment | Input beam drift ~ 0.1 mrad/h in pitch | [Jenne, Manasa, Yuta]
We temporarily centered the beam on |
|
8254
|
Thu Mar 7 18:48:43 2013 |
yuta | Update | Computer Scripts / Programs | releasing my secret scripts | I released/updated my secret scripts to
real scripts directory.
I checked they run correctly (but |
|
8255
|
Fri Mar 8 02:17:04 2013 |
yuta | Update | LSC | calibration of PRM actuator | [Manasa, Yuta]
We measured AC response of PRM actuator |
  |
8256
|
Fri Mar 8 03:07:19 2013 |
yuta | Update | LSC | calibrated PRM-ITMY length spectra | Measured free swing PRM-ITMY length was
230
nm RMS. |
 |
8259
|
Fri Mar 8 15:27:42 2013 |
yuta | Update | Green Locking | PSL green shutter installed | [Manasa, Yuta]
Mechanical shutter for PSL green is |
|
8261
|
Fri Mar 8 16:05:56 2013 |
yuta | Bureaucracy | General | action items for PRMI / ALS-FPMI | We should focus our work both on PRMI and
ALS-FPMI (elog
#8250). |
|
8283
|
Wed Mar 13 08:34:33 2013 |
yuta | Update | Locking | TWO arms TWO colors | - I took the shutter from AS table to use
it for the PSL green. It was sitting near
MC REFL path unused (elog |
|
16827
|
Tue May 3 21:05:23 2022 |
yuta | Update | BHD | AS path alignment, removing a lot of green stuff | [Tega, Yehonathan, Koji, Yuta]
We tried to align AS path this afternoon. |
7x |
16850
|
Thu May 12 20:24:29 2022 |
yuta | Update | BHD | POX and POY investigation | [Anchal, Yuta]
We checked POX and POY RF signal chains |
|
16856
|
Mon May 16 13:22:59 2022 |
yuta | Update | BHD | REFL and AS paths aligned at AP table | After Xarm and Yarm were aligned by Anchal
et al, I aligned AS and REFL path
in the AP table. |
 |
16865
|
Thu May 19 18:56:08 2022 |
yuta | Update | BHD | Current OSEM sensor values with all the suspensions aligned | Current OSEM sensor values with all the
suspensions aligned are attached.
For 'BS','ITMX','ETMX','ITMY','ETMY','PRM','SRM','LO1','LO2', |
|
16873
|
Wed May 25 16:38:27 2022 |
yuta | Update | SUS | Suspensions quick health check | [JC, Yuta]
We did a quick health check of
suspesions after the pump down. |
 |
16875
|
Wed May 25 17:34:47 2022 |
yuta | Configuration | BHD | IFO recovery - IFO alignment | IFO aligned to maximize flashings, except
for GRY and LO-AS.
|
|
16877
|
Thu May 26 19:55:43 2022 |
yuta | Configuration | BHD | Oplevs centered, BHD DCPDs are now online | [Paco, Yuta]
We have aligned the IFO (except
for LO-AS and GRY), and centered |
    |
16880
|
Fri May 27 17:45:53 2022 |
yuta | Configuration | BHD | BHD camera installed, GRY aligned | [JC, Paco, Yuta]
After the IFO recovery (elog 40m/16881), |
|
16884
|
Wed Jun 1 11:56:28 2022 |
yuta | Update | ALS | Shutter driver for GRY replaced | [JC, Yuta]
We replaced a shutter driver for GRY |
|