ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
8149
|
Sat Feb 23 16:54:24 2013 |
Jenne | Update | LSC | can't lock Y arm | I'm not sure that Yuta had found the real
Yarm flashes last night. When I came
in today, the Yarm would flash. However |
|
|
8150
|
Sat Feb 23 17:14:59 2013 |
yuta | Update | LSC | can't lock Y arm | Jenne found that;
0. If all mirrors are "aligned,"
Yarm flashes. |
|
|
8151
|
Sat Feb 23 18:01:38 2013 |
Zach | Summary | Electronics | Replacement for the AD743: OPA140 and OPA827 | Rana suggested that I measure the OPA827
and OPA140 noise with high source impedance
so as to see if we could find the low-frequency |
|
|
8152
|
Sun Feb 24 00:14:28 2013 |
Manasa | Update | SUS | SUS Summary | I tried to fix the alarms for sensors on
the SUS summary screen. I checked earlier
elogs and found the setSensors.py script. |
|
|
8153
|
Sun Feb 24 16:49:00 2013 |
rana | Summary | Electronics | Replacement for the AD743: OPA140 and OPA827 | This looks pretty good already.
Not sure if we can even measure anything
reasonable below 0.1 Hz without a lot of |
|
|
8154
|
Sun Feb 24 17:54:34 2013 |
rana | Update | SUS | SUS Summary |
I asked John Z to talk with
Jamie and then install a new NDS2 server |
|
|
8155
|
Mon Feb 25 08:22:03 2013 |
Steve | Update | VAC | pumpdown at day 4 | All normal, IFO pressure 1.5e-5 Torr
RGA is pumped by TP-3 in back ground
mode. |
|
|
8156
|
Mon Feb 25 13:01:39 2013 |
Koji | Summary | General | Quick, compact, and independent tasks | - IMC PDH demodulation phase adjustment
- Permanent setup for green transmission
DC PDs on the PSL table |
|
|
8157
|
Mon Feb 25 15:30:29 2013 |
yuta | Update | Alignment | Y arm locked, both colors | [Koji, Yuta]
We aligned Y arm to Y green and tweaked |
|
|
8158
|
Mon Feb 25 17:58:28 2013 |
rana | Update | Alignment | Y arm locked, both colors |
That's good news. I was ready
to give up and say we should vent and remove |
|
|
8159
|
Mon Feb 25 20:04:22 2013 |
Jamie | Update | SUS | suspension controller model modifications in prep for global damping initiative | [Jamie, Brett, Jenne]
We made some small modifications
to the |
|
|
8160
|
Mon Feb 25 20:25:33 2013 |
Brett | Update | SUS | New Global Damping MEDM Screens | Global damping screens are in progress
for the new global damping infrastructure
Jamie discussed in log #8159. The main overview |
|
|
8161
|
Mon Feb 25 20:49:07 2013 |
Brett | Update | SUS | Minor Mod made to SUS_GLOBAL block | I made a minor modification to install
some output filters in the new global damping
GLOBAL box in c1sus.mdl. These will be needed |
|
|
8162
|
Mon Feb 25 21:25:14 2013 |
yuta | Update | Alignment | both arms locked in IR | [Jenne, Evan, Yuta]
After Y alignment, X arm is aligned |
|
|
8163
|
Mon Feb 25 22:30:40 2013 |
Jenne | Bureaucracy | General | action items for PRFPMI |
CDS:
- Check out ASS |
|
|
8164
|
Mon Feb 25 22:42:32 2013 |
yuta | Summary | Alignment | current IFO situation | [Jenne,Yuta]
Both arms are aligned starting from |
|
|
8165
|
Tue Feb 26 01:49:27 2013 |
Jenne | Update | Locking | PRMI locked | [Jenne, Yuta]
We began the evening, after alignment
of all optics was good (arms flashing, PRC |
|
|
8166
|
Tue Feb 26 02:04:51 2013 |
Koji | Update | Locking | PRMI locked | One of the biggest issues we had was that
any Q signals (i.e. the quadrature where
PRCL is absent.) of REFL11/33/55/(165) haven't |
|
|
8167
|
Tue Feb 26 09:55:46 2013 |
Steve | Update | SAFETY | Evan receives safety training | Evan got 40m specific safety training today. |
|
|
8168
|
Tue Feb 26 10:17:44 2013 |
Jamie | Update | SUS | removed global/local switch from sus_single_control | [jamie, brett]
Yesterday
we added some new control logic to the sus_single_control |
|
|
8169
|
Tue Feb 26 10:20:31 2013 |
Jamie | Update | SUS | MC2 suspension controller reverted to library part | I made good on my threat from yesterday
to convert the MC2 suspension controller
to the library part. Whatever changes |
|
|
8170
|
Tue Feb 26 11:55:11 2013 |
Manasa | Update | Locking | FPMI locked | [Yuta, Manasa]
FPMI locked. |
|
|
8171
|
Tue Feb 26 15:32:47 2013 |
Jenne | Update | Locking | FPMI locked |
|
|
|
8172
|
Tue Feb 26 16:13:18 2013 |
Brett | Update | SUS | ITMY and ETMY mysterious loop gain difference of 2.5 | While doing initial measurements for the
new global damping infrastructure I discovered
that the ETMY loop between the OSEM actuation |
|
|
8173
|
Tue Feb 26 17:36:28 2013 |
Chloe | Update | | QPD Circuit | I corrected the circuit diagram I constructed
last time - it would read 0 output most of
the time because I made a mistake with the |
|
|
8174
|
Tue Feb 26 17:56:15 2013 |
Brett | Update | SUS | Global Damping Update | The global damping input and output matrices
were installed to run for the Y-arm. Since
we are using just one arm for now, only the |
|
|
8175
|
Wed Feb 27 00:08:43 2013 |
Jenne | Update | IOO | Meditations on converting TT channels to be more SUS-like | Jamie and I have had a few back-and-forths
on this, but I wanted to write down my thoughts
on the parts of the SUS infrastructure that |
|
|
8176
|
Wed Feb 27 00:56:01 2013 |
Jenne | Update | ASS | Motivation for reactivating the ASS | I am putting a little bit of brain power
into reviving the ASS, and I want to write
down what the motivation is, and what the |
|
|
8177
|
Wed Feb 27 01:09:53 2013 |
yuta | Update | Locking | PRMI sideband/carrier locked | [Jenne,Yuta]
We succeeded in locking PRMI in sideband |
6x |
|
8178
|
Wed Feb 27 02:21:55 2013 |
Jenne | Update | ASS | Motivation for reactivating the ASS | I have modified the MeasureSpotPositions.py
script to accept the arms as valid cavities
(it used to give an error "Sorry, this |
|
|
8179
|
Wed Feb 27 02:44:39 2013 |
Jenne | Update | Locking | DRFPMI flashes | Before Yuta left, I asked him to restore
all optics to last saved values, to avoid
hysteresis. |
|
|
8180
|
Wed Feb 27 02:52:40 2013 |
Jenne | Omnistructure | SAFETY | Back door unlocked | Did someone unlock the back door by the
(unofficial) bike storage lately? Out
of habit, I checked the door behind me while |
|
|
8181
|
Wed Feb 27 11:22:54 2013 |
yuta | Update | Computers | backup crontab | I made a simple script to backup crontab
(/opt/rtcds/caltech/c1/scripts/crontab/backupCrontab).
|
|
|
8182
|
Wed Feb 27 11:59:43 2013 |
yuta | Update | SUS | PRM/BS coil re-balanced | I re-adjusted coil gains and f2a filters
for PRM and BS.
I'm not sure what happened to PRM |
|
|
8183
|
Wed Feb 27 14:39:59 2013 |
Annalisa | Update | LSC | Fibre laid for RFPD audio | [Annalisa, Jenne, Rana, Steve]
We installed the fibres on cable
trays the 1Y2 and the Control Room. |
|
|
8184
|
Wed Feb 27 14:53:02 2013 |
Steve | Update | LSC | what is the Fibox ? | Fibox
FBAI-M 20bit units were connected with
multimode |
|
|
8185
|
Wed Feb 27 14:59:01 2013 |
Evan | Update | | Altered MC demodulation phase | I took out a short (~12 cm) SMA cable
from the "LO input" path into the
MC demod board in an attempt to maximize |
|
|
8186
|
Wed Feb 27 17:43:54 2013 |
Riju | Update | | Photodiode transimpedance | Here is the transimpedance for the other
PD used for MC REFL |
|
|
8187
|
Wed Feb 27 18:01:46 2013 |
Koji | Update | | Photodiode transimpedance | How
much is the exact resonant frequency?
And |
|
|
8188
|
Wed Feb 27 18:17:05 2013 |
Riju | Update | | Photodiode transimpedance |
|
|
|
8189
|
Wed Feb 27 18:38:51 2013 |
Riju | Update | | Photodiode transimpedance |
|
|
|
8190
|
Wed Feb 27 19:27:29 2013 |
Annalisa | HowTo | COMSOL Tips | Mirror support Eigenfrequency | I studied the eigenfrequencies of
a mirror support using COMSOL.
|
|
|
8191
|
Wed Feb 27 20:10:43 2013 |
rana | Update | Locking | DRFPMI flashes |
If its true that there have
been large flashes, then there indeed might |
|
|
8192
|
Wed Feb 27 20:50:41 2013 |
Manasa | Update | LSC | 22/110MHz path for POP | [Yuta, Manasa]
Modified POP path. |
|
|
8193
|
Wed Feb 27 22:28:53 2013 |
Brett | Update | SUS | Global Damping Update | New excitation points were added
after the global damping loops for more testing
options. The updated c1sus.mdl model was |
|
|
8194
|
Wed Feb 27 22:46:53 2013 |
Max Horton | Update | Summary Pages | Multiprocessing Implementation | Overview: In order to make the code
more maintainable, I need to factor it into
different well-documented classes. |
|
|
8195
|
Wed Feb 27 23:19:54 2013 |
rana | Update | Summary Pages | Multiprocessing Implementation | At first I thought that this
was goofy, but then I logged in and saw that
Megatron only has 8GB of RAM. I guess that |
|
|
8196
|
Thu Feb 28 02:43:49 2013 |
yuta | Update | LSC | some qualitative evidence of PRMI sideband lock | [Manasa, Yuta]
Since we have setup POP22 PD now( |
|
|
8197
|
Thu Feb 28 03:25:27 2013 |
yuta | Update | LSC | PR gain ~ 25 from PRMI carrier lock | [Manasa, Yuta]
We locked PRMI in carrier. |
|
|
8198
|
Thu Feb 28 03:41:31 2013 |
Koji | Update | LSC | PR gain ~ 25 from PRMI carrier lock | VERY
GOOD!
This is how the carrier lock PRMI |
|