| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
7855
|
Wed Dec 19 11:14:25 2012 |
Steve | Update | SUS | BeCu wire in stock |
|
|
|
7854
|
Tue Dec 18 16:44:00 2012 |
riju | Update | | Photodiode transimpedance | Today I measured the dark current of the
PDA10CF. The output of the PD was connected
to the A channel of the network analyzer, |
|
|
7853
|
Tue Dec 18 16:37:40 2012 |
Steve | Update | VAC | last RGA scan before vent |
|
|
|
7852
|
Tue Dec 18 16:37:17 2012 |
Jamie | Update | Alignment | Post vent, pre door removal alignment | [Jenne, Manasa, Jamie]
Now that we're up to air we relocked
the mode cleaner, tweaked up the alignment, |
|
|
7851
|
Tue Dec 18 15:51:33 2012 |
Jenne | Update | IOO | Old G&H TT mirrors' phase maps measured | I took the 2 G&H mirrors that we de-installed
from PR3 and SR3 over to GariLynn to measure
their phase maps. Data is in the same place |
|
|
7850
|
Tue Dec 18 15:32:29 2012 |
Jenne | Update | SUS | TT angle of incidence |
|
|
|
7849
|
Tue Dec 18 10:43:20 2012 |
Steve | Update | VAC | vent has completed | The 40m vacuum envelope is at atm
It took 4.5 hours at ~3 Torr/min speed. Atm1
|
|
|
7848
|
Tue Dec 18 07:03:40 2012 |
Manasa | Update | General | Vent plan: WE VENT TOMORROW |
|
|
|
7847
|
Tue Dec 18 00:45:19 2012 |
Koji | Summary | General | The projector lamp ended its life? | ...Nah. |
|
|
7846
|
Mon Dec 17 22:49:33 2012 |
Manasa | Summary | General | The projector lamp ended its life? |
|
|
|
7845
|
Mon Dec 17 22:42:27 2012 |
Koji | Summary | General | The projector lamp ended its life? | i just heard a rather large exploding sound
in the control room.
I tried to locate the source and found |
|
|
7844
|
Mon Dec 17 21:41:30 2012 |
rana | Summary | SUS | BeCu wire | Just in case we want to retrofit |
|
|
7843
|
Mon Dec 17 21:33:45 2012 |
Manasa | Update | General | Vent plan: WE VENT TOMORROW |
|
|
|
7842
|
Mon Dec 17 20:22:07 2012 |
Jamie | Update | General | Vent plan: WE VENT TOMORROW | We will vent tomorrow
(12/18)
After lengthy discussion,
I have determined that we should vent now, |
|
|
7841
|
Mon Dec 17 19:47:15 2012 |
rana | Update | PEM | Seismic StripTool config updated | I have updated the Seismic Striptool display
which is plotted on the wall in the control
room. Please take a look and make comments. |
|
|
7840
|
Mon Dec 17 18:39:02 2012 |
Jenne | Update | IOO | IPPOS centered, no IPANG beam | I centered IPPOS. I do not find any
IPANG beam on the ETMY table, even waving
the IR card in the black beam tube. |
|
|
7839
|
Mon Dec 17 14:45:01 2012 |
Jenne | Update | Alignment | Videos with PRMI locked | [Jamie, Jenne]
Koji and Jamie locked the PRMI, and
then Jamie and I took some videos. |
|
|
7838
|
Mon Dec 17 14:13:55 2012 |
Jenne | Update | SUS | PRM oplev gains restored |
|
|
|
7837
|
Mon Dec 17 11:20:58 2012 |
Jenne | Update | SUS | Beam dumps on vertex oplevs removed | I'm not sure when this was done, but there
were beam dumps in front of the lasers for
BS/PRM oplevs as well as ITMY/SRM oplevs. |
|
|
7836
|
Fri Dec 14 17:12:19 2012 |
Evan Hall | Update | PSL | PMC yaw tune-up (from Wednesday night) | Wednesday night, there was ~0.4 V on the
PMC transmission PD. I adjusted the steering
mirrors into the PMC and got the transmission |
|
|
7835
|
Fri Dec 14 16:35:38 2012 |
Ayaka | Update | LSC | High frequency sensitivity improved | Since I found that the the AS sensitivity
seems to be limited by circuit noise, I inserted
a RF amplifier just after the AS RF output. |
|
|
7834
|
Fri Dec 14 14:40:31 2012 |
Riju | Update | | Photodiode transimpedance | Photodiode PDA10CF was under test. The
RF out signal of AG4395A had been divided
by splitter with one output of the splitter |
|
|
7833
|
Fri Dec 14 10:09:30 2012 |
Ayaka | Update | LSC | High frequency noise in AS signal |
|
|
|
7832
|
Fri Dec 14 09:31:59 2012 |
rana | Update | LSC | High frequency noise in AS signal | This is NOT calibrated. Its sort of calibrated
in the 500-1000 Hz area, but does not correctly
use the loop TF or the cavity pole. |
|
|
7831
|
Fri Dec 14 09:05:04 2012 |
steve | Update | PEM | TT after eq 6.1 |
SRM, ITMY and MC3 moved some
what, but how are the TT? It may worth looking |
|
|
7830
|
Fri Dec 14 03:49:02 2012 |
Ayaka | Update | General | Earthquake | There was an earthquake around 2:30 am.
Now all the mirrors except SRM are damped.
|
|
|
7829
|
Fri Dec 14 03:32:51 2012 |
Ayaka | Update | LSC | High frequency noise in AS signal | I calibrated the AS error signal into the
displacement of the YARM cavity in the same
way as I did before (elog). |
|
|
7828
|
Fri Dec 14 03:15:49 2012 |
Jenne | Update | SUS | TT angle of incidence | But have you looked yet at what angle we
need? The first input string mirror has a
quite small incidence angle. The other input |
|
|
7827
|
Fri Dec 14 02:52:32 2012 |
Koji | Update | SUS | TT angle of incidence | At least, we don't want to use Al-coated
mirrors. We should use multilayer dielectric
mirrors. |
|
|
7826
|
Fri Dec 14 01:42:53 2012 |
Den | Update | SUS | TT angle of incidence | I've estimated max possible angle of incidence
on TT if we allow 20mm tolerance for the
beam size and 5 mm tolerance for spot location |
|
|
7825
|
Thu Dec 13 21:21:34 2012 |
Den | Update | PEM | seismometers |
|
|
|
7824
|
Thu Dec 13 18:06:59 2012 |
Ayaka | Update | WienerFiltering | New microphone mounts | Yesterday, I made new mounts for
microphones.
|
|
|
7823
|
Thu Dec 13 17:24:53 2012 |
Ayaka | Update | PSL | PMC calibration for MC_F calibration | I calibrated MC_F signal into Hz/rtHz
unit using the transfer function from
MC_F to PMC feedback signal. |
6x |
|
7822
|
Thu Dec 13 04:42:32 2012 |
Den | Update | SUS | ITMX local damping | Tonight we've noticed that ITMX local damping
was kicking the optics. This happened because
LR shadow sensor was not working. In ~30 |
|
|
7821
|
Thu Dec 13 04:29:34 2012 |
Den | Update | SUS | TT angle of incidence | I think the angle of incidence on TT inside
BSC will be too large because of eddy current
damping brackets. I've measured max possible |
|
|
7820
|
Thu Dec 13 03:20:48 2012 |
Den | Update | LSC | beam inside DRMI is clipping on PR3 Tip-Tilt |
|
|
|
7819
|
Thu Dec 13 01:49:53 2012 |
rana | Update | PEM | seismometers |
|
|
|
7818
|
Wed Dec 12 20:22:03 2012 |
Jamie | Update | Computer Scripts / Programs | illuminators fixed and added to VIDEO screen | I fixed the illuminator setup. ETMY
was not hooked up, and the screen wasn't
configured quite right. The ITMX illuminator |
|
|
7817
|
Wed Dec 12 17:26:47 2012 |
Riju | Update | | Testing AG4395A+GPIB | I repeated my experiment to get noise level.
To get that I disconnected the bandpass filter
SBP-10.7 from channel A of network |
|
|
7816
|
Wed Dec 12 16:52:12 2012 |
Jenne | Update | Alignment | PR2_face, PR3_back cameras in place | I have setup cameras looking at the back
of PR3 (through the north viewport on the
MC chamber) and the face of PR2 (through |
|
|
7815
|
Wed Dec 12 14:59:49 2012 |
Manasa | Configuration | 40m Upgrading | New tip-tilts layout in BSC | I have updated the BSC layout to include
the new tip-tilts. The bigger footprints
of the tiptilts are on in |
|
|
7814
|
Wed Dec 12 11:49:05 2012 |
Ayaka | Update | LSC | Acoustic noise in POX and AS error signal | [Koji, Ayaka]
Last night, I injected acoustic noise
at POX table and AS table with oplev controls |
|
|
7813
|
Wed Dec 12 11:04:45 2012 |
Manasa | Configuration | 40m Upgrading | Endtable upgrade for auxiliary green laser : ETMX layout on new table | I have updated the layout to fix all the
issues brought up. The last couple of 2"
green steering mirrors will hold the PZTs |
|
|
7812
|
Tue Dec 11 21:53:37 2012 |
Ayaka | Update | LSC | Oplev update for improving sensitivity | [Rana, Ayaka]
The BS oplev pitch feedback came
back. |
|
|
7811
|
Tue Dec 11 19:51:36 2012 |
Koji | Update | PSL | PMC gain was too low / EPICS alerting value for PMC updated | [Ayaka, Koji]
Ayaka pointed out that the PMC has
too low unity gain frequency. We checked |
|
|
7810
|
Tue Dec 11 11:40:07 2012 |
Manasa, Ayaka | Update | PSL | PMC drift | [Manasa, Ayaka]
I found that MC got unstable this
morning. This is caused by the drift of PMC. |
|
|
7809
|
Tue Dec 11 10:09:04 2012 |
Ayaka | HowTo | PEM | cables needs care |
|
|
|
7808
|
Tue Dec 11 09:31:47 2012 |
Ayaka | Update | LSC | Oplev update for improving sensitivity | Motivation
We observed that oplev servos affect |
7x |
|
7807
|
Tue Dec 11 08:53:52 2012 |
Steve | HowTo | PEM | cables needs care | How NOT
to:
The |
|
|
7806
|
Mon Dec 10 22:34:34 2012 |
Den | Update | LSC | beam inside DRMI is clipping on PR3 Tip-Tilt |
|
|