| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
8078
|
Wed Feb 13 19:09:32 2013 |
yuta | Summary | General | possible explanations to oval REFL beam | [Jenne, Manasa, Jamie, Yuta]
The shape of the REFL beam reflected |
|
|
8077
|
Wed Feb 13 16:31:08 2013 |
Jenne | Update | PSL | PMC pitch input tuned, MC yaw input tuned | [Jenne, Yuta]
I looked at PMCR camera on the MC1
tv, and tweaked up the beam going into the |
|
|
8076
|
Wed Feb 13 14:21:19 2013 |
Jenne | Update | Locking | PRC cavity gains |
|
|
|
8075
|
Wed Feb 13 09:28:56 2013 |
Steve | Update | Optics | G&H - HR plots |
Gooch & Housego optics
order specification from 03-13-2010 |
|
|
8074
|
Wed Feb 13 01:26:08 2013 |
yuta | Summary | General | rough analysis of aligned PRM-PR2 mode scan | Koji was correct.
When you estimate the variance of |
|
|
8073
|
Tue Feb 12 23:24:17 2013 |
yuta | Update | Alignment | IFO alignment in prep for in-air PRMI | [Manasa, Yuta]
Lot's of alignment work, |
|
|
8072
|
Tue Feb 12 23:22:14 2013 |
Manasa | Update | Scattering | Scattering setup |
[Jan, Manasa]
We installed a camera at the ETMY |
|
|
8071
|
Tue Feb 12 20:57:47 2013 |
Jenne | Update | Alignment | IFO alignment in prep for in-air PRMI | We should check MC spot positions to see
what they are.
Also, I'm not thrilled about the |
|
|
8070
|
Tue Feb 12 20:42:36 2013 |
Jamie | Update | Alignment | IFO alignment in prep for in-air PRMI | Yuta, Manasa, Jamie, Jenne, Steve, Rana
Starting this morning, we removed
the temporary half PRC mirror in front of |
|
|
8069
|
Tue Feb 12 18:28:46 2013 |
Jamie | Summary | Optics | Curvature radii of the G&H/LaserOptik mirrors |
|
|
|
8068
|
Tue Feb 12 18:25:43 2013 |
Jamie | Summary | General | half PRC with astigmatic PR2/3 |
|
|
|
8067
|
Tue Feb 12 17:26:31 2013 |
Chloe | Update | | QPD circuitry to test mount vibrations | I spent awhile today reading about
op-amps and understanding what would be necessary
to design a circuit which would directly |
|
|
8066
|
Tue Feb 12 00:50:08 2013 |
yuta | Update | Locking | PR2 oplev spectra | I wanted to see if PR2 motion makes PRC
beam motion or not, using temporary oplev
to PR2. |
|
|
8065
|
Tue Feb 12 00:14:00 2013 |
yuta | Update | Locking | PRM coil balancing | We tried to lock half-PRC tonight, but
we couldn't. Why?? I could lock yesterday.
It locks for ~ 1 sec, but it beam |
|
|
8064
|
Mon Feb 11 21:03:15 2013 |
yuta | Update | Locking | PR2-flipped half-PRC mode scan | To estimate the systematic effects to the
g-factor measurement, I changed how to analyze
the data in multiple ways. |
|
|
8063
|
Mon Feb 11 19:55:47 2013 |
Manasa | Update | Optics | G&H - AR Reflectivity |
I adjusted the focal length of the
focusing lens and reduced the beam size enough |
|
|
8062
|
Mon Feb 11 18:44:34 2013 |
Jamie | Update | Computers | passwerdz changed |
|
|
|
8061
|
Mon Feb 11 18:39:10 2013 |
Chloe | Update | General | Pictures of Circuitry in Photodiode | I am going to be making measurements to
find the optical mounts with the least noise.
I am using a quadrature photodiode to record |
|
|
8060
|
Mon Feb 11 17:54:02 2013 |
Koji | Summary | Optics | Curvature radii of the G&H/LaserOptik mirrors | I, by chance, found that my windows
partition has Vision32 installed.
So I run my usual curvature characterization |
|
|
8059
|
Mon Feb 11 17:17:30 2013 |
Jamie | Summary | General | more analysis of half PRC with flipped PR2 |
|
|
|
8058
|
Mon Feb 11 16:29:33 2013 |
Jenne | Update | Locking | Temp oplev for PR2; ITMX temporarily has no oplev | [Yuta, Jenne]
In an effort to see what is going
on with the beam spot motion, and to investigate |
|
|
8057
|
Mon Feb 11 16:16:27 2013 |
Steve | Update | VAC | 55 days at atmoshere | CP
Stat 100 sheet-covers were replaced
by clean ones on open chambers BS, ITMX, |
|
|
8056
|
Mon Feb 11 13:15:16 2013 |
yuta | Update | Locking | PR2-flipped half-PRC mode scan | I found a mistake in my code (thanks Jamie!).
I forgot to square the g-factor.
I corrected the following elogs; |
|
|
8055
|
Mon Feb 11 13:07:17 2013 |
Max Horton | Update | Summary Pages | Fixed A Calendar Bug | Understanding the Code: Documented
more functions in summary_pages.py.
Since it is very difficult and slow to understand |
|
|
8054
|
Mon Feb 11 12:49:54 2013 |
Jenne | Summary | LSC | Resonant freq change - why? (and passive TT mode freqs) |
|
|
|
8053
|
Sun Feb 10 18:00:13 2013 |
yuta | Summary | LSC | PR2-flipped half-PRC spectra/OLTF | To compare with future PRMI locking, I
measured spectra of POPDC and feedback signal.
I also measured openloop transfer function |
|
|
8052
|
Sun Feb 10 17:30:39 2013 |
yuta | Update | Locking | PR2-flipped half-PRC mode scan | I redid half-PRC mode scan by applying
mislignment to PRM.
Half-PRC's |
|
|
8051
|
Sat Feb 9 19:34:34 2013 |
rana | Update | Optics | G&H - AR Reflectivity |
Use the trick I suggested:
Focus the beam so that the beam size |
|
|
8050
|
Sat Feb 9 11:25:35 2013 |
Koji | Update | Locking | PR2-flipped half-PRC mode scan | Don't Shouldn't you
apply a small misalignment to the input beam?
Isn't that why the peak for the 1st-order |
|
|
8049
|
Fri Feb 8 23:59:42 2013 |
yuta | Update | Locking | PR2-flipped half-PRC mode scan | I did mode scan of PR2-flipped half-PRC
to see if it behaves as we expect.
Measured |
|
|
8048
|
Fri Feb 8 23:22:48 2013 |
Den | Summary | Modern Control | progress report | I wrote a small document on the application
of LQG method to a Fabry-Perot cavity control. |
|
|
8047
|
Fri Feb 8 23:04:40 2013 |
Manasa | Update | Optics | G&H - AR Reflectivity |
|
|
|
8046
|
Fri Feb 8 22:49:31 2013 |
Koji | Update | Optics | G&H - AR Reflectivity | How about to measure the AR reflectivity
at larger (but small) angles the extrapolate
the function to smaller angle, |
|
|
8045
|
Fri Feb 8 21:14:52 2013 |
Manasa | Update | Optics | G&H - AR Reflectivity | Hours of struggle and still no
data |
|
|
8044
|
Fri Feb 8 20:27:56 2013 |
Koji | Update | RF System | MC REFL Photodiode transimpedance | The comment itself was added by me.
The difference between the previous |
|
|
8043
|
Fri Feb 8 20:05:15 2013 |
Jenne | Update | Locking | PRMI work | I fixed up the POP path so that there is
no clipping, so that Yuta can take a cavity
mode scan. |
|
|
8042
|
Fri Feb 8 19:39:02 2013 |
Koji | Update | Locking | PRMI work | It seems that the cavity trans looks much
better than before. Cool. |
|
|
8041
|
Fri Feb 8 19:29:44 2013 |
yuta | Summary | General | arbcav of half PRC with flipped PR2 | We need expected finesse and g-factor to
compare with mode-scan measurement. Can you
give us the g-factor of the half-PRC and |
|
|
8040
|
Fri Feb 8 18:23:32 2013 |
Jamie | Summary | General | arbcav of half PRC with flipped PR2 | Arbcav with half PRC (flat temporary mirror
in front of BS), PR2 RoC = 600m, PR3 RoC
= -600m: |
|
|
8039
|
Fri Feb 8 17:41:34 2013 |
Jenne | Update | Locking | PRMI work |
[Yuta, Jenne]
After much tweaking of the alignment |
|
|
8038
|
Fri Feb 8 17:15:56 2013 |
Jenne | Update | RF System | MC REFL Photodiode transimpedance | This measurement was done already about
a week ago, in elog 7984.
Can you please describe why the numbers for |
|
|
8037
|
Fri Feb 8 15:53:48 2013 |
Jenne | Update | Locking | PRMI work |
|
|
|
8036
|
Fri Feb 8 12:43:26 2013 |
yuta | Update | Computers | videocapture.py now supports movie capturing | I updated /opt/rtcds/caltech/c1/scripts/general/videoscripts.py
so that it supports |
|
|
8035
|
Fri Feb 8 12:42:45 2013 |
nicolas | Summary | General | PRC/arm mode matching calculations |
|
|
|
8034
|
Fri Feb 8 12:39:32 2013 |
yuta | Update | Locking | PRMI work | Half-PRC at this time already have two
changes from the previous half-PRC; PR2 replaced/flipped
and different TM before BS. |
|
|
8033
|
Fri Feb 8 11:07:07 2013 |
Jamie | Summary | General | PRC/arm mode matching calculations |
|
|
|
8032
|
Fri Feb 8 11:01:18 2013 |
Jamie | Update | Locking | PRMI work | I completely agree with Koji. We
definitely should have locked the half PRC
first. We were all set up for that. |
|
|
8031
|
Fri Feb 8 02:38:04 2013 |
Koji | Update | Locking | PRMI work | I feel it's too hasty to use the PRMI.
I support the idea of the half-PRC |
|
|
8030
|
Fri Feb 8 02:12:14 2013 |
Jenne | Update | Locking | PRMI work | [Jenne, Yuta]
Lots |
|
|
8029
|
Fri Feb 8 00:23:33 2013 |
rana | Summary | General | PRC/arm mode matching calculations |
I would guess that either flipping
PR2 or PR3 would give nearly the same effect |
|