| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
7952
|
Tue Jan 29 10:59:37 2013 |
lazy person | Frogs | General | better plan |
I propose we work around this
problem with giant |
|
|
7951
|
Tue Jan 29 10:50:02 2013 |
Jenne | Update | Locking | Video of PRM-flat test cavity |
I think Den accidentally edited and
overwrote my entry, rather than replying, |
|
|
7950
|
Mon Jan 28 21:36:44 2013 |
tall guy | Frogs | General | small people on notice | If I catch anyone putting small booties
into the large bootie bin, I will make said
person eat small booties. |
|
|
7949
|
Mon Jan 28 21:32:38 2013 |
jamie | Update | Alignment | tweaking of alignment into half PRC | [Koji, Jamie]
We tweaked up the alignment of the
half PRC a bit. Koji started by looking |
|
|
7948
|
Mon Jan 28 19:15:14 2013 |
Manasa | Update | Scattering | Scattering setup | [Jan, Manasa]
We are trying to get some scattering
measurements in the Y-arm cavity. We have |
|
|
7947
|
Mon Jan 28 19:07:45 2013 |
Manasa | Update | General | SN6 Laseroptik mirror - Tranmittance measurements | I repeated the measurements using NPRO
instead of Crystalaser. I am attaching optical
layouts for these measurements for future |
|
|
7946
|
Mon Jan 28 17:59:02 2013 |
Riju | Update | | Photodiode transimpedance | Summary: Measurement and plot of
shot-noise-intercept-current for PDA255. |
|
|
7945
|
Mon Jan 28 17:01:19 2013 |
Den | Update | Locking | Video of PRM-flat test cavity | What mode will you get if lock the cavity
PRM - ITMY/ITMX/TEST MIRROR without PR2,
PR3 and BS? |
|
|
7944
|
Fri Jan 25 08:10:42 2013 |
Steve | Update | General | Laseroptik mirrors | Here are the German plots. Unfortunately
they are not logarithmic.
Ed: Proprietary data removed. |
|
|
7943
|
Thu Jan 24 16:34:56 2013 |
rana | Update | General | Laseroptik mirror - SN6 | I have two questions:
1) Are we sure that the T measurement
is not being compromised by some systematic? |
|
|
7942
|
Thu Jan 24 16:31:46 2013 |
Steve | Update | PEM | building exterier wall painted | The wood exteier walls, gutters and doors
were painted at CES-Annex building #69 |
|
|
7941
|
Thu Jan 24 16:23:24 2013 |
Koji | Update | General | Laseroptik mirror - SN6 | The mirror T is completely out of spec.
We should find or request the data sheet
of the mirror. |
|
|
7940
|
Thu Jan 24 15:16:50 2013 |
Manasa | Update | General | Laseroptik mirror - SN6 | I repeated the transmittance measurements
of Laseroptik SN6 at 1064nm. The rotation
stage could only resolve 2 deg rotation (We |
|
|
7939
|
Thu Jan 24 14:40:09 2013 |
Steve | Update | VAC | RGA backgroung | RGA background with VM2 open to Maglev
at day 37
|
|
|
7938
|
Thu Jan 24 11:40:55 2013 |
Jenne | Update | SUS | ETMX damping restored |
|
|
|
7937
|
Thu Jan 24 11:31:45 2013 |
Steve | Update | SUS | ETMX damping restored | ETMX sus damping restored. It is
still noisy |
|
|
7936
|
Thu Jan 24 08:28:35 2013 |
Steve | Update | VAC | when to pumpdown ? | Reminder: I will be on vacation next week.
We would have to put the access connector
in tonight if I'm pumping down Friday, tomorrow. |
|
|
7935
|
Wed Jan 23 22:02:25 2013 |
Manasa | Update | General | Laseroptik mirror - SN6 |
|
|
|
7934
|
Wed Jan 23 20:46:46 2013 |
Zen Master | Update | Locking | PR-flat cavity status - locks! |
|
|
|
7933
|
Wed Jan 23 20:27:05 2013 |
Riju | Update | | Photodiode transimpedance | Today I have repeated the expt for shot
noise intercept current. Koji found that
the Spectrum analyzer is going to saturation, |
|
|
7932
|
Wed Jan 23 20:24:05 2013 |
Koji | Update | General | Laseroptik mirror - SN6 | Got confused (even after I talked with
Manasa).
The plot shows the number ~0.01 or |
|
|
7931
|
Wed Jan 23 19:05:16 2013 |
Jenne | Update | Locking | PR-flat cavity status - locks! | Status update
I (with help from Q) have redone
the POP path on the ITMX table. 1" |
|
|
7930
|
Wed Jan 23 18:16:11 2013 |
Manasa | Update | General | Laseroptik mirror - SN6 | I repeated the transmittance measurements
of LaserOptik SN6 @1064nm.
Transmittance for s-polarization |
|
|
7929
|
Wed Jan 23 11:43:19 2013 |
Riju | Update | | Photodiode transimpedance |
|
|
|
7928
|
Tue Jan 22 19:53:01 2013 |
Jenne | Update | Locking | PR-flat cavity status - not locked | The PR-flat cavity is flashing, although
not locked. I am too hungry to continue
right now. |
|
|
7927
|
Tue Jan 22 19:51:52 2013 |
Koji | Update | | Photodiode transimpedance | - The data should be plotted in a log-log
scale.
- The data points were only taken |
|
|
7926
|
Tue Jan 22 17:29:29 2013 |
Riju | Update | | Photodiode transimpedance | Riju
Summary: I am stuck with the
measurement of shot-noise-intercept-current |
|
|
7925
|
Tue Jan 22 11:09:58 2013 |
Steve | Update | Tip - Tilt | SS mirror holder ordered | Koji's design of the SS 2" mirror
holder with flexure spring optic retainer
like Polaris-K1 has been ordered. We are |
|
|
7924
|
Tue Jan 22 09:18:50 2013 |
Steve | Update | Tip - Tilt | tip tilt bases ordered | The corrected drawing base for tip tilt
with coils are going to the shop. The will
be back by the end of the week. |
|
|
7923
|
Tue Jan 22 09:10:19 2013 |
Steve | Update | PEM | big foot is dirty | Please wipe, clean car wheels and wear
booties entering the 40m lab.
Obviously this person has no idea |
|
|
7922
|
Sat Jan 19 18:23:31 2013 |
rana | Update | Computers | All front ends but c1lsc are down | After sshing into several machines and
doing 'sudo shutdown -r now', some of them
came back and ran their processes. |
|
|
7921
|
Sat Jan 19 16:02:28 2013 |
rana | Omnistructure | Electronics | PS cleanup | During our 'Women in Physics' tours today,
we were reminded that there are several bench
power supplies being used as permanent inside. |
|
|
7920
|
Sat Jan 19 15:05:37 2013 |
Jenne | Update | Computers | All front ends but c1lsc are down | Message I get from dmesg of c1sus's IOP:
[ 44.372986] c1x02: Triggered
the ADC |
|
|
7919
|
Fri Jan 18 15:08:13 2013 |
jamie | Update | Alignment | alignment of temporary half PRC | [jenne, jamie]
Jenne and I got the half PRC flashing.
We could see flashes in the PRM and PR2 face |
|
|
7918
|
Fri Jan 18 12:08:08 2013 |
Koji | Update | Locking | Dust? | No
|
|
|
7917
|
Fri Jan 18 09:54:18 2013 |
Jenne | Update | Locking | PRM - Flat mirror cavity |
|
|
|
7916
|
Fri Jan 18 00:41:34 2013 |
Jenne | Update | Locking | Dust? | I was thinking tonight about more possible
reasons that our PRC sucks, and I wonder
if dust on the BS could create the problem. |
|
|
7915
|
Thu Jan 17 19:33:53 2013 |
Manasa | Update | Alignment | PRM oplev | We had to work on redesigning the
oplev layout in BSC when I found that the
positions of the mirrors were clipping IPPOS |
|
|
7914
|
Thu Jan 17 17:04:49 2013 |
Steve | Update | VAC | vac monitor screen changed | The COVAC_MONITOR.adl was changed. Ion
pump labeled as disconnected means: ion pump
controller power turned off and ion pump |
|
|
7913
|
Thu Jan 17 15:48:21 2013 |
Jenne | Update | Locking | PRM - Flat mirror cavity |
2" G&H mirror is installed
on a DLC mount just in front of the BS. |
|
|
7912
|
Thu Jan 17 11:01:19 2013 |
Jenne | Update | Alignment | Yesterday's alignment work | [Jamie, Jenne, Manasa]
Yesterday's goal was to get the input
beam centered on the PRM, the BS and ETMY |
|
|
7911
|
Thu Jan 17 01:27:54 2013 |
Tara(?) | Summary | IOO | Noise budget for MC |
|
|
|
7910
|
Thu Jan 17 00:17:31 2013 |
Jenne | Update | Locking | Expected PRC gains |
|
|
|
7909
|
Wed Jan 16 20:27:16 2013 |
rana | Update | Locking | Expected PRC gains | Why would we use such a bad optic in our
recycling cavity? Is 1.5% the spec for these
mirrors? Is this the requirement that Kiwamu |
|
|
7908
|
Wed Jan 16 19:08:51 2013 |
Koji | Summary | IOO | Noise budget for MC | I missed the point.
Do you mean that we can measure the coating |
|
|
7907
|
Wed Jan 16 18:58:08 2013 |
Riju | Update | | Photodiode transimpedance | Today I have taken the reading for shot
noise intercept current for the PDA255 -
MC transmission RF PD. To do that I have |
|
|
7906
|
Wed Jan 16 18:52:49 2013 |
Jenne | Update | Locking | PRM - Flat mirror cavity plan | Game plan:
* Put 2" G&H mirror into
BS chamber, in front of BS. |
|
|
7905
|
Wed Jan 16 18:08:06 2013 |
Jenne | Update | Locking | Expected PRC gains | I was calculating the power recycling gains
we expect for different versions of the PRC,
and I am a little concerned that we aren't |
|
|
7904
|
Wed Jan 16 10:57:37 2013 |
tara | Summary | IOO | Noise budget for MC | I calculated thermal noise in mode cleaner
(MC) mirrors and compared it with the measured
MC noise. Thermal noise won't be a significant |
|
|
7903
|
Wed Jan 16 08:29:45 2013 |
Steve | Update | SUS | PRM damping restored | PRM oplev servo turned off. OLPIT
servo gain 0.15 and OLYAW -0.3 set
to ZERO. PRM damping restored |
|