| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
2112
|
Sun Oct 18 22:06:15 2009 |
rana | Configuration | Electronics | IP POS is back: ND filter gone, new resistors in | I tried to compare the IP_POS time series
with the IPANG and MC_TRANS but was foiled
at first: |
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|
2111
|
Sun Oct 18 22:05:40 2009 |
kiwamu | Update | LSC | LSC timing issue | Today
I made a measurement to research the LSC
timitng issue as mentioned on |
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|
2110
|
Sun Oct 18 19:55:45 2009 |
rana | Configuration | Electronics | IP POS is back: ND filter gone, new resistors in | Its back in and re-centered. Our
next move on IPPOS should be to replace its
steering mirror with something bigger and |
|
|
2109
|
Sun Oct 18 16:09:34 2009 |
rana | Configuration | ASC | loop opened on PZT2 YAW at 3:40 pm |
I wanted to see how long our IP POS
beam has been badly clipped - turns out its |
|
|
2108
|
Sun Oct 18 15:46:08 2009 |
Alberto | Configuration | General | Antique, unused QPD removed from the AS table | Inspecting the AS table to make an inventory
of the photodiodes in use around the interferometer,
I found a mysterious photodetector hiding |
|
|
2107
|
Fri Oct 16 18:46:36 2009 |
rana | Configuration | ASC | loop opened on PZT2 YAW at 3:40 pm |
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2106
|
Fri Oct 16 16:44:39 2009 |
Alberto, Sanjit | Update | Computers | elog restarted | This afternoon the elog crashed. We just
restarted it. |
|
|
2105
|
Fri Oct 16 16:08:00 2009 |
rob | Configuration | ASC | loop opened on PZT2 YAW at 3:40 pm | I pushed the "closed loop" button
on PZT2 YAW around 3:40 pm today, then roughly
recentered it using the DC Offset knob on |
|
|
2104
|
Fri Oct 16 13:25:18 2009 |
Koji | Summary | LSC | funny timing setup on the LSC | Could be this.
http://ilog.ligo-la.caltech.edu/ilog/pub/ilog.cgi?group=detector&task=view&date_to_view=10/02/2009&anchor_to_scroll_to=2009:10:02:13:33:49-waldman
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|
2103
|
Fri Oct 16 12:40:59 2009 |
Koji | Configuration | General | Some questions | Some questions came arise to me:
A. How the green injection system
should be? How the handing off between 532 |
|
|
2102
|
Fri Oct 16 10:15:02 2009 |
steve | Update | IOO | IP ang & pos recentered | Pointing stability of 4 days. Initial pointing
does not go through suspended optics. It
is launched right after the Piezo Jena |
|
|
2101
|
Fri Oct 16 03:16:50 2009 |
rana, rob | Summary | LSC | funny timing setup on the LSC | While measuring the Piezo Jena noise
tonight we noticed that the LSC timing is
setup strangely. |
|
|
2100
|
Thu Oct 15 17:12:00 2009 |
rana | Summary | Locking | never had it so good |
|
|
|
2099
|
Thu Oct 15 12:57:23 2009 |
Zach | Update | PSL | inventory |
|
|
|
2098
|
Thu Oct 15 12:35:09 2009 |
Zach | Update | PSL | inventory | I'm at the PSL table taking inventory of
the elements I don't have down yet. |
|
|
2097
|
Thu Oct 15 09:23:07 2009 |
steve | Summary | Locking | never had it so good | Awesome 5 hrs of locking Rob! |
|
|
2096
|
Thu Oct 15 02:41:04 2009 |
rana | Update | COC | Choice of folding mirrors in the RC cavities | In addition to the main mirrors (PRM, SRM)
we will also have fold mirrors (called PR1,
PR2, SR1, SR2). I am curious to see if we |
|
|
2095
|
Thu Oct 15 02:38:10 2009 |
rana, rob | Update | OMC | Dark Port Mode Scan using the OMC | Bottom trace is proportional to the OMC
PZT voltage - top trace is the transmitted
light through the OMC. Interferometer is |
|
|
2094
|
Thu Oct 15 01:21:31 2009 |
rana | Summary | COC | Thermal Lensing in the ITM | Thermal lensing formula:
|
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2093
|
Wed Oct 14 23:02:41 2009 |
rana | Update | Locking | daytime locking | This is huge. |
|
|
2092
|
Wed Oct 14 16:59:37 2009 |
rob | Update | Locking | daytime locking | The IFO
can now be locked during the daytime. |
|
|
2091
|
Wed Oct 14 15:48:26 2009 |
Mott | HowTo | General | Phase Noise measurement | I have gotten the hang of the procedure
for measuring phase noise on the AOMs.
Koji suggested I right up a short |
|
|
2090
|
Tue Oct 13 10:50:58 2009 |
Zach | Update | PSL | one more time |
|
|
|
2089
|
Tue Oct 13 10:31:11 2009 |
Zach | Update | PSL | one more time | I am at the PSL table taking what is hopefully
the last set of pictures for the diagram.
Woohoo. |
|
|
2088
|
Mon Oct 12 22:15:15 2009 |
rana | Configuration | PSL | Stray beam blocking | You can remove the RFAM measuring setup.
Once we upgrade, we will no longer have a
MZ or the related problems. |
|
|
2087
|
Mon Oct 12 20:01:13 2009 |
Koji | Configuration | SAFETY | Stray beam blocking | OK! I saw the optics are redundant and
some of the components are not in a right
place. |
|
|
2085
|
Mon Oct 12 19:53:44 2009 |
Koji | Configuration | SAFETY | Stray beam blocking | I aligned the EOM and the beam to the PMC.
The beam is still hitting the bottom of the
EOM aperture,
|
|
|
2084
|
Mon Oct 12 18:38:07 2009 |
Jenne | Configuration | SAFETY | Stray beam blocking |
|
|
|
2083
|
Mon Oct 12 18:37:55 2009 |
Zach | Update | PSL | Inventory | --Apologies for the late post--
I was at the PSL table taking an
inventory of the components for a while after |
|
|
2082
|
Mon Oct 12 17:27:20 2009 |
Koji | Configuration | SAFETY | Stray beam blocking | Steve, Kiwamu, and Koji
We went through the PSL table to
make sure any strong beam did not hit the |
|
|
2081
|
Mon Oct 12 17:14:39 2009 |
rob | Update | Locking | stability | Last night, 2+ hour lock, probably broken
by me driving too hard (DARM_EXC). |
|
|
2080
|
Mon Oct 12 14:51:41 2009 |
rob | Update | Computers | c1susvme2 timing problems update update update |
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|
2079
|
Sun Oct 11 04:12:44 2009 |
rana | Update | PEM | Accelerometers relocated | Some of these channels are not like the
others. |
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|
2078
|
Fri Oct 9 17:41:04 2009 |
Jenne | Update | PEM | Accelerometers relocated | [Sanjit, Jenne]
The set of 6 accelerometers which
were semi-randomly placed underneath the |
|
|
2077
|
Fri Oct 9 17:37:21 2009 |
Jenne | Update | IOO | MC2 trans beam is dumped | Last night while noise hunting, Rana found
that the MC2 trans beam has been left for
an unknown length of time just hitting the |
|
|
2076
|
Fri Oct 9 16:36:13 2009 |
rob | Update | IOO | frequency noise problem | I used the XARM as a reference to measure
the frequency noise after the MC. It's
huge around 4kHz--hundreds of times larger |
|
|
2075
|
Fri Oct 9 14:23:53 2009 |
Alex Ivanov | Configuration | DAQ | tpchn mystery | "Yes. This master file is used."
|
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|
2074
|
Fri Oct 9 03:53:56 2009 |
Jenne | Update | Adaptive Filtering | Remaking the ASS | The c1ass computer, which is now used for
the OAF system, has many remnants from the
days when it was actually used as an ASS. |
|
|
2073
|
Fri Oct 9 01:31:56 2009 |
rana | Configuration | DAQ | tpchn mystery | Does anyone know if this master
file is the real thing that's in use now? |
|
|
2072
|
Thu Oct 8 22:17:15 2009 |
rana | Configuration | DMF | input channels changed | I changed the input channels of the DMF
recently so that it now uses 3 Guralp channels
in addition to the 3 ACC and 1 Ranger. |
|
|
2071
|
Thu Oct 8 21:32:59 2009 |
Koji | Summary | General | Recycling cavity loss | I looked at the data of the day before
yesterday (Oct 06) to know how much is the
recycling gain. |
|
|
2070
|
Thu Oct 8 20:18:56 2009 |
Koji | Summary | General | Arm cavity loss | Last night (Oct 07), I ran armLoss script
in order to obtain the latest numbers for
the arm cavity loss. |
|
|
2069
|
Thu Oct 8 14:41:46 2009 |
jenne | Update | Computers | c1susvme1 is back online |
|
|
|
2068
|
Thu Oct 8 11:37:59 2009 |
josephb | Update | Computers | Reboot of dcuepics helped, c1susvme1 having problems | Power cycling c1dcuepics seems to have
fixed the EPICs channel problems, and c1lsc,
c1asc, and c1iovme are talking again. |
|
|
2067
|
Thu Oct 8 11:10:50 2009 |
josephb, jenne | Update | Computers | EPICs Computer troubles | At around 9:45 the RFM/FB network alarm
went off, and I found c1asc, c1lsc, and c1iovme
not responding. |
|
|
2066
|
Wed Oct 7 20:32:21 2009 |
rana | Update | Adaptive Filtering | extra delay and noise in PEM -> ASS/OAF system | [Rana, Jenne]
There is some craziness going on
with the delay in the PEM path for the OAF. |
|
|
2065
|
Wed Oct 7 19:23:49 2009 |
Jenne | Update | Adaptive Filtering | (Final?) PEM cabling changes |
|
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2064
|
Wed Oct 7 11:18:40 2009 |
kiwamu | Summary | Electronics | racks of electronics |
I took the pictures of all racks
of electronics yesterday, and then uploaded |
|
|
2063
|
Wed Oct 7 07:42:55 2009 |
rana | Update | Adaptive Filtering | Attempts to take a TF of the OAF system | I remeasured
the OAF time delay using the OAF-TF template |
|
|
2062
|
Wed Oct 7 06:26:09 2009 |
rana | HowTo | IOO | MC_L calibration + some DTT lore | I drove MC2 in POS and used the
resulting response in MC_F to calibrate the
IOO-MC_L channel. |
|