| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
8021
|
Thu Feb 7 10:35:35 2013 |
yuta | Update | General | Store optics in respective cabinets | I'm not the one who opened the ITMX table
yesterday, but thanks for reminding me.
I put POP DC oscilloscope and its |
|
|
8020
|
Thu Feb 7 09:03:54 2013 |
Manasa | Update | General | Store optics in respective cabinets |
@Yuta
The ITMX table has been left open since |
|
|
8019
|
Wed Feb 6 22:39:23 2013 |
Jamie | Update | General | PRC/arm mode matching with flipped PR2/PR3: coming soon | I intended to post a long analysis of the
PRC/arm mode matching for the various TT
situations using Nic's a |
|
|
8018
|
Wed Feb 6 20:19:52 2013 |
Manasa | Update | Optics | G&H and LaserOptik mirrors | [Koji, Manasa]
We measured the wedge angle of the
G&H and LaserOptik mirrors at the OMC |
|
|
8017
|
Wed Feb 6 20:03:50 2013 |
Manasa | Update | Locking | PRC cavity gains |
|
|
|
8016
|
Wed Feb 6 20:00:06 2013 |
Manasa | Update | Electronics | BNC cables piled up at every corner | [Yuta, Steve, Manasa]
There are cables piled up around
the access connector area which have been |
|
|
8015
|
Wed Feb 6 19:59:35 2013 |
rana | Update | Locking | PRC cavity gains | Getting closer, but need to
use the real measured AR reflectivity values,
not the 1500 ppm guess. These should be measured |
|
|
8014
|
Wed Feb 6 18:39:08 2013 |
Jenne | Update | Locking | PRC cavity gains | [Yuta, Jenne]
We have both calculated, and agree
on the numbers for, the PRC gain for carrier |
|
|
8013
|
Wed Feb 6 15:39:19 2013 |
Steve | Update | Electronics | DC power supplies in cabinets | East arm cabinet E9 and E10
|
|
|
8012
|
Wed Feb 6 15:20:55 2013 |
yuta | Summary | General | FWHM was wrong | I have to blame Jamie for putting extra
2 randomly.
Measured PRM-PR2 cavity |
|
|
8011
|
Wed Feb 6 15:11:21 2013 |
Jenne | Update | Electronics | "Temporary" power supply situation | [Jenne, Yuta, Rana, Steve, Manasa]
We have taken stock of the lab
"temporary" power supply situation, |
|
|
8010
|
Wed Feb 6 15:10:22 2013 |
Steve | Update | PEM | new safety signs on exterier doors |
|
|
|
8009
|
Wed Feb 6 15:05:18 2013 |
Steve | Update | SAFETY | cameras must be anchord | Cameras
must be immediately anchord to avoid a possible |
|
|
8008
|
Wed Feb 6 14:51:25 2013 |
Jenne | Update | Electronics | 1 power supply replaced! |
|
|
|
8007
|
Wed Feb 6 11:59:12 2013 |
Jenne | Update | Locking | PRC cavity gains | EDIT: These numbers are for a perfect,
non-lossy arm cavity. So, a half real,
half imaginary world. |
|
|
8006
|
Tue Feb 5 19:32:47 2013 |
yuta | Summary | General | PR2/PR3 flipping and PRC stability | We are considering of flipping PR2 and/or
PR3 to make PRMI stable because PR2/PR3 seems
to be convex. |
|
|
8005
|
Tue Feb 5 19:16:22 2013 |
Jamie | Summary | General | arbcav of PRC with +600 RoC PR2/3 | This is just a simple rerun of arbcav from
#7995
but with the PR2/3 RoCs set to 600, instead |
|
|
8004
|
Tue Feb 5 15:31:03 2013 |
Steve | Update | General | clean assembly room benches cleaned up | Manasa, Jamie and Steve,
Tip-Tilts and parts moved into the
most north " 40m " cabinet |
|
|
8003
|
Tue Feb 5 12:08:43 2013 |
Max Horton | Update | Summary Pages | Updating summary pages | Getting started: Worked on
understanding the functionality of summary_page.py.
The problem with the code is that it was |
|
|
8002
|
Tue Feb 5 11:30:19 2013 |
Koji | Summary | General | rough analysis of aligned PRM-PR2 mode scan | Makes sense. I mixed up n and n-1
Probability function: X = (x1 + x2
+ ... + xn)/n, where xi = xavg +/- dx |
|
|
8001
|
Tue Feb 5 10:18:54 2013 |
Steve | Update | PEM | high particle count ALART |
|
|
|
8000
|
Tue Feb 5 10:09:08 2013 |
yuta | Summary | General | rough analysis of aligned PRM-PR2 mode scan | stdev of [0.764, 0.751] is 0.007, but what
we need is the error of the averaged number.
Statistical error of the averaged number |
|
|
7999
|
Tue Feb 5 09:08:11 2013 |
Steve | Update | PEM | exterier doors to be painted |
|
|
|
7998
|
Tue Feb 5 03:16:51 2013 |
Koji | Summary | General | rough analysis of aligned PRM-PR2 mode scan | 0.764 and 0.751 do not give us the stdev
of 0.005.
I have never seen any Yokogawa in |
|
|
7997
|
Tue Feb 5 02:04:44 2013 |
yuta | Summary | General | rough analysis of aligned PRM-PR2 mode scan | I redid PRM-PR2 cavity scan using oscilloscope
to avoid anti-aliasing effect.
Measured |
|
|
7996
|
Mon Feb 4 22:46:03 2013 |
Jamie | Summary | General | arbcav for SRC with curved TTs | I ran Zach's arbcav on our SRC with curved
TTs and the situation looks much worse than the PRC. |
|
|
7995
|
Mon Feb 4 19:48:32 2013 |
Jamie | Summary | General | arbcav recalc of PRC with correct ITM transmission | I noticed that Koji used a high reflector
for the ITMs for his full PRC arbcav calculation.
I just redo it here with the correct ITM |
|
|
7994
|
Mon Feb 4 19:33:19 2013 |
yuta | Summary | General | rough analysis of aligned PRM-PR2 mode scan | [Jenne, Yuta]
We redid PRM-PR2 cavity scan because |
|
|
7993
|
Mon Feb 4 15:26:10 2013 |
Jamie | Update | Computer Scripts / Programs | New "getdata" program to pull NDS channel data, including test points | I've added a new program called getdata
(to scripts/general/getdata) that will conveniently
pull arbitrary data from an NDS server, either |
|
|
7992
|
Mon Feb 4 15:06:56 2013 |
Koji | Summary | General | Hypothesis |
|
|
|
7991
|
Mon Feb 4 11:10:59 2013 |
Koji | Summary | General | rough analysis of aligned PRM-PR2 mode scan | The expected finesse is 100ish. How much
can we beleive the measured number of 50?
From the number we need to assume |
|
|
7990
|
Mon Feb 4 10:45:51 2013 |
Jamie | Summary | General | rough analysis of aligned PRM-PR2 mode scan | Here's a sort of rough analysis of the
aligned PRM-PR2 cavity mode scan.
On Friday we took some mode scan |
|
|
7989
|
Sun Feb 3 13:20:02 2013 |
Koji | Summary | General | Hypothesis | Rana mentioned the possibility that the
PR2 curvature makes the impact on the mode
stability. Entry |
|
|
7988
|
Fri Feb 1 23:52:59 2013 |
rana | Update | Locking | PRM/PR2 cavity | Very exciting result, if true. I
suppose we should try to reconfirm this result
by doing another phase map of PRM03. |
|
|
7987
|
Fri Feb 1 23:12:42 2013 |
Koji | Update | Locking | PRM/PR2 cavity | During the scanning we were riddled by
the fact the PDH error and the transmission
peaks do not happen simultaneously. |
|
|
7986
|
Fri Feb 1 19:55:33 2013 |
Jenne | Update | Locking | PRM/PR2 cavity | [Jamie, Koji, Jenne]
We are looking at the mode scan data,
and have some preliminary results! |
|
|
7985
|
Fri Feb 1 15:12:53 2013 |
Jenne | Update | Locking | PRM/PR2 cavity | After Jamie did all the work this
morning on the POP table, I was able to get
the cavity to lock. It's not very stable |
|
|
7984
|
Fri Feb 1 14:47:17 2013 |
Riju | Update | | Photodiode transimpedance | Summary: |
|
|
7983
|
Fri Feb 1 12:34:55 2013 |
Jenne | Update | PSL | Too much power injected into vacuum | I noticed (while relocking the MC after
Jamie and I zeroed the LSC offsets) that
the MC refl power was 4.8 V. Usually |
|
|
7982
|
Fri Feb 1 12:22:27 2013 |
Zach | Summary | ASC | Optics lit | It's OK; even Siegman got it wrong---48
times.
RA: NO, stil not OK. |
|
|
7981
|
Fri Feb 1 09:33:11 2013 |
Jamie | Update | Locking | PRM/PR2 cavity | I replaced the BS1 between the POPDC PD
and the camera with a 98 reflector, and moved
the 50 up before the BS to dump half the |
|
|
7980
|
Thu Jan 31 23:48:45 2013 |
Koji | Update | Locking | PRM/PR2 cavity | Wow! What's happened? |
|
|
7979
|
Thu Jan 31 22:14:11 2013 |
rana | Summary | ASC | Optics lit | Gouy not Guoy:
http://www.rp-photonics.com/gouy_phase_shift.html
pronounced Goo-eee, with the emphasis |
|
|
7978
|
Thu Jan 31 20:06:22 2013 |
Evan | Update | Locking | PRM/PR2 cavity | [Jenne, Evan]
Tonight we made a non-folded cavity
between the PRM and PR2 as follows. I put |
|
|
7977
|
Thu Jan 31 15:56:38 2013 |
Riju | Update | | Photodiode transimpedance | Summary: Measurement |
|
|
7976
|
Thu Jan 31 15:34:22 2013 |
Riju | Update | RF System | Photodiode transimpedance |
|
|
|
7975
|
Thu Jan 31 15:20:46 2013 |
Zach | Update | Locking | Mode spacing calc | I should mention that I just found a bug
in how it treats odd-mirror-number cavities.
For such cavities, HG modes with odd horizontal |
|
|
7974
|
Thu Jan 31 14:46:05 2013 |
Jenne | Update | RF System | Photodiode transimpedance |
|
|
|
7973
|
Thu Jan 31 14:30:50 2013 |
Jenne | Update | Locking | Mode spacing calc | I have calculated (using Zach's sweet software)
the expected mode content for the various
possible PRCs that we can make. |
|
|
7972
|
Thu Jan 31 12:44:42 2013 |
Riju | Update | | Photodiode transimpedance | Today I collected the data for shot noise
intercept current for MC REFL PD. I didn't
get many data points at higher DC voltage |
|