| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
8094
|
Sat Feb 16 18:32:01 2013 |
yuta | Summary | RF System | phase tracker: OLTF | I measured openloop transfer function of
the phase tracking loop for the first characterization
of phase tracker. |
|
|
8093
|
Sat Feb 16 17:27:26 2013 |
yuta | Update | SUS | PRM coil balanced | PRM coil gains and f2a filters are adjusted
for PRMI work.
It seems like |
|
|
8092
|
Fri Feb 15 21:22:29 2013 |
yuta | Update | Electronics | AS55 replaced with POP55 PD | I temporarily replaced AS55 PD with PD
labeled "POP55(POY55)".
I think POP55 is working because I |
|
|
8091
|
Fri Feb 15 20:07:28 2013 |
yuta | Update | Alignment | POP path set up but AS55 is broken | [Manasa, Yuta]
We set up POP camera and POPDC PD, |
|
|
8090
|
Fri Feb 15 17:11:13 2013 |
Chloe | Update | | QPD circuit pictures | I took better pictures of the circuits
of the QPD and spent a couple of hours with
a multimeter trying to figure out how all |
|
|
8089
|
Fri Feb 15 16:09:19 2013 |
Koji | Update | General | beam traps ready to be installed | For the hexagonal one, insert one of the
glass plate only half. Use a 1"x.5"
piece if exists. |
|
|
8088
|
Fri Feb 15 15:21:07 2013 |
Jamie | Update | Computers | c1iscex IO-chassis dead | I appears that the c1iscex IO-chassis is
either dead or in a very bad state.
The PCIe interface card in the IO-chassis |
|
|
8087
|
Fri Feb 15 09:58:49 2013 |
Steve | Update | General | beam traps ready to be installed | Black-green glass traps are ready for light
in vacuum. I can assemble more if needed.
These three sizes are available. |
|
|
8086
|
Fri Feb 15 01:51:43 2013 |
Jenne | Summary | Alignment | IFO aligned and ready for PRMI locking |
Yuta and Manasa, you guys are awesome!
Small, inconsequential point: |
|
|
8085
|
Fri Feb 15 01:41:02 2013 |
Manasa, Yuta | Summary | Alignment | IFO aligned and ready for PRMI locking | [Yuta, Manasa, Jenne, Jamie, Steve]
IFO aligned and ready for |
|
|
8084
|
Thu Feb 14 10:42:41 2013 |
Jamie | Summary | Alignment | MMT, curved TTs does not explain beam ellipticity at Faraday | After using alamode to calculate the round-trip
mode of the beam at the Faraday exit after
retro-reflection form the PRM, I'm not able |
|
|
8083
|
Thu Feb 14 08:29:41 2013 |
Steve | Update | IOO | low MC1 OSEM voltage | MC1 - LR, LL, UL & UR OSEMs
should be adjusted to get 1.2V |
|
|
8082
|
Thu Feb 14 00:10:12 2013 |
yuta | Summary | Alignment | REFL is not clipped | Let's wait for astigmatism calculation.
In either case(clipping or astigmatism), |
|
|
8081
|
Wed Feb 13 22:09:26 2013 |
Jenne | Update | Alignment | REFL is not clipped | We need to calculate whether this level
of astigmatism is expected from the new active
TT mirrors, but |
|
|
8080
|
Wed Feb 13 19:41:07 2013 |
yuta | Summary | General | possible explanations to oval REFL beam | We checked that REFL beam is already oval
in the vacuum. We also centered in-air optics,
including lens, in the REFL path, but REFL |
|
|
8079
|
Wed Feb 13 19:30:45 2013 |
Koji | Summary | General | possible explanations to oval REFL beam | >> "What has changed since:"
Recently
the REFL path has been rearranged |
|
|
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 |
|