| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
1310
|
Mon Feb 16 15:54:07 2009 |
Yoichi | Update | Computers | medm directory wiped on nodus | [quote][COLOR=red][B]I accidentally did an
'rm -rf' on the medm directory in nodus[/B][/COLOR],
instead of on my laptop as was intended.
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|
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1309
|
Mon Feb 16 14:12:21 2009 |
Yoichi | Update | LSC | FE system rebooted | [quote]
I can't restart the MC autolocker on c1susvme2
because it doesn't let me ssh in. I tried |
|
|
1308
|
Mon Feb 16 10:18:13 2009 |
Alberto | Update | LSC | FE system rebooted | [quote][quote]
I didn't get a chance to do much testing
since the sus controller (susvme1) went nuts. |
|
|
1307
|
Mon Feb 16 00:43:46 2009 |
rana | Update | Computers | medm directory wiped on nodus | [COLOR=red][B]I accidentally did an 'rm -rf'
on the medm directory in nodus[/B][/COLOR],
instead of on my laptop as was intended.
|
|
|
1306
|
Sun Feb 15 15:53:21 2009 |
Rob | Update | LSC | Locking status | [quote]
I didn't get a chance to do much testing
since the sus controller (susvme1) went nuts. |
|
|
1305
|
Sun Feb 15 09:35:00 2009 |
Yoichi | Update | LSC | Locking status | [quote]
I found a '$<' in the offloadMCF script.
I don't know precisely what that construct |
|
|
1304
|
Sat Feb 14 16:53:26 2009 |
rob | Update | LSC | Locking status | [quote]Yoichi, Jenne, Alberto, Rob
Last night, the locking proceeded until the |
|
|
1303
|
Sat Feb 14 16:15:19 2009 |
rob | Configuration | Computers | c1susvme1 | c1susvme1 is behaving weirdly. I've
restarted it several times but its computation
time is hanging out around 260 usec, making |
|
|
1302
|
Fri Feb 13 16:30:49 2009 |
steve | Configuration | General | status quo is disturbed | I have been getting ready for the annual
safety inspection in the past 2-3 days.
Meaning cleaning up and disturbing |
|
|
1301
|
Fri Feb 13 13:35:38 2009 |
Yoichi | Update | LSC | Locking status | Yoichi, Jenne, Alberto, Rob
Last night, the locking proceeded until the |
|
|
1300
|
Fri Feb 13 08:38:03 2009 |
steve | Update | IOO | MC2 damping restored | |
|
|
1299
|
Thu Feb 12 18:35:10 2009 |
Kakeru | Configuration | PSL | PA current limitter |
I added a PA current limiter.
It is only a voltage devider (composed |
|
|
1298
|
Thu Feb 12 17:43:33 2009 |
Yoichi | Update | LSC | SRC strangeness solved | I found the problem with the DRMI lock I had
last night was caused by the zero gain in
the PD11_I filter.
|
|
|
1297
|
Thu Feb 12 14:39:07 2009 |
rana | Summary | General | Silicon Beam Dump test | Yesterday evening, Ken Mailand and I tested
the reflectivity of a piece of polished Silicon.
Since Silicon has such a high thermalconductivity |
|
|
1296
|
Thu Feb 12 11:21:54 2009 |
Yoichi | Update | LSC | Locking effort resumed | Last night, I restarted the locking work.
Quite some time was wasted by the disconnected
REFL199 by Alberto for the cavity length |
|
|
1295
|
Wed Feb 11 23:51:53 2009 |
Kakeru | Update | PSL | PA current and laser output | I attached a plot of ISS monitor PD and MOPA
output to PA current.
The both end of PA current (26.0353[A] and |
|
|
1294
|
Wed Feb 11 15:01:47 2009 |
josephb | Configuration | Computers | Allegra | So after having broke Allegra by updating
the kernel, I was able to get it running
again by copying the xorg.conf.backup file |
|
|
1293
|
Wed Feb 11 11:39:17 2009 |
steve | Configuration | General | vac envelope ground | The vacuum envelope was grounded from
the IOO chamber to master ground north (under
electric breaker panel L)
with |
|
|
1292
|
Wed Feb 11 10:52:22 2009 |
Yoichi | Configuration | DAQ | C1:PEM-OSA_APTEMP and C1:PEM-OSA_SPTEMP disconnected | During the cleanup of the lab. Steve found
a box with two BNCs going to the ICS DAQ
interface and an unconnected D-SUB on the |
|
|
1291
|
Wed Feb 11 07:28:25 2009 |
Yoichi | Update | PSL | PA current and laser output | I think we should also plot the laser power
at the MOPA output. The horizontal axis should
be the absolute current value read from the |
|
|
1290
|
Wed Feb 11 00:50:24 2009 |
caryn | Update | General | ants? | So, near 2 of the trashcans in the control
room and underneath a desk there are hundrends
of ants. Is this normal? |
|
|
1289
|
Tue Feb 10 23:36:25 2009 |
Kakeru | Update | PSL | PA current and laser output | I changed the PA current and measured laser
output power (monitor PD signal).
The gain of ISS is 13dB
|
|
|
1288
|
Tue Feb 10 10:48:48 2009 |
steve | Bureaucracy | SAFETY | safety glasses scanned | All 40m safety glasses are absorbent.
They
were scanned by 180 mW 2mm spot size
of 1064 nm beam and their transmissions |
|
|
1287
|
Mon Feb 9 19:50:48 2009 |
Yoichi | Configuration | PSL | ISS disconnected | We are doing measurements on ISS.
The ISS feedback connector is disconnected
and the beam to the MC is blocked. |
|
|
1286
|
Mon Feb 9 17:09:51 2009 |
Yoichi | Update | Computers | A bunch of updates for the network GPIB stuff. | During the work on ISS, we noticed that netgpibdata.py
is very unreliable for SR785.
The problem was caused by flakiness of the |
|
|
1285
|
Mon Feb 9 16:05:01 2009 |
Yoichi | Update | LSC | DRMI OK | After the ISS work, I aligned the IFO and
confirmed that DRMI locks with good SPOB
and AS166 values. |
|
|
1284
|
Mon Feb 9 16:02:42 2009 |
Yoichi | Update | PSL | PSL relative intensity noise | I attached the relative intensity noise of
the PSL.
There is no bump around the lower UGF (~1Hz), |
|
|
1283
|
Fri Feb 6 23:23:48 2009 |
Kakeru, Yoichi | Update | PSL | ISS is fixed | Yoichi and me found that the transfar function
of the current shunt changed with the current
of PA. |
|
|
1282
|
Fri Feb 6 16:23:54 2009 |
steve | Update | MOPA | MOPAs of 7 years | MOPAs and their settings, powers of 7 years
in the 40m |
|
|
1281
|
Fri Feb 6 16:20:52 2009 |
Yoichi | Update | PSL | MOPA current slider fixed | I fixed the broken slider to change the
current of the PA.
The problem was that the EPICS database |
|
|
1280
|
Fri Feb 6 14:49:31 2009 |
steve | Summary | SAFETY | laser inventory |
40M Laser Inventory at Feb 05,
2009
1, Lightwave PA#102 @ 77,910 |
|
|
1279
|
Fri Feb 6 10:46:40 2009 |
Kakeru | Update | PSL | ISS servo and noise | I measured the output noise of eache stage
of ISS servo, and calcurated the noise ratio
between input and
|
|
|
1278
|
Fri Feb 6 09:56:11 2009 |
Kakeru | Update | PSL | ISS servo transfar function | I attache the transfar function of ISS
servo.
The 4th stage and variable gain amplifier |
|
|
1277
|
Fri Feb 6 09:52:35 2009 |
Kakeru | Update | PSL | Current shunt transfar function | I attach the transfar function of the current
shunt.
There is a little gap at 10 Hz for |
|
|
1276
|
Thu Feb 5 21:42:28 2009 |
Yoichi | Update | PSL | My thoughts on ISS | Today, I worked with Kakeru on ISS.
The problem is sort of elusive. Some
time, the laser power looks fine, but after |
|
|
1275
|
Thu Feb 5 16:21:07 2009 |
Jenne | Frogs | Computers | Belladonna connects to the wireless Martian network again | Symptoms: Belladonna could
not (for a while) connect to the wireless
network, since there was a driver problem |
|
|
1274
|
Thu Feb 5 10:42:33 2009 |
Yoichi | Update | General | Do we need off-axis parabolic mirrors ? No way ! | I made a mistake in estimating the astigmatism
problem.
If we use the current MMT1 as it is, this |
|
|
1273
|
Thu Feb 5 09:12:29 2009 |
steve | Bureaucracy | SAFETY | safety updates & fire alarm test | The fire alarm test was completed at 13:30
yesterday.
|
|
|
1272
|
Wed Feb 4 19:22:57 2009 |
Yoichi | Update | General | Do we need off-axis parabolic mirrors ? | I also estimated the mode matching degradation
caused by the astigmatism.
Since the incident angles to the mode matching |
|
|
1271
|
Wed Feb 4 17:45:39 2009 |
Yoichi | Update | General | Mode matching of the upgraded IFO | I did mode matching calculations for the new
optical layout.
For the input mode matching, we have to change |
|
|
1270
|
Tue Feb 3 23:44:44 2009 |
Kakeru, Peter, Yoichi | Update | PSL | ISS unstability | We found that one OP-amp used in ISS servo
oscillated in 10 MHz, 100mV.
Moreover, we found another OP-amp |
|
|
1269
|
Tue Feb 3 19:24:14 2009 |
Yoichi | Update | General | New optics layout wiki page | I uploaded a slightly updated version of the
new optics layout on the 40m wiki.
http://lhocds.ligo-wa.caltech.edu:8000/40m/Upgrade_08/Optical_Layout
|
|
|
1268
|
Tue Feb 3 15:01:38 2009 |
Alberto | Frogs | Computers | megatron slow? | I notice that Megatron is slower than any
other computer in running code that invokes
optickle or looptickle (i.e. three times |
|
|
1267
|
Mon Feb 2 19:23:53 2009 |
Yoichi | Update | General | New optical layout plan | The attached is a plan of the optical layout
in the central part for the upgrade.
I included, the folded recycling cavities, |
|
|
1266
|
Mon Feb 2 18:51:02 2009 |
Alberto | Configuration | General | New Elog 2.7.5 in Service on Nodus |
|
|
|
1265
|
Mon Feb 2 18:32:54 2009 |
Alberto | Configuration | General | Some little problem with the new elog |
|
|
|
1264
|
Mon Feb 2 17:25:44 2009 |
Alberto | Configuration | General | Some little problem with the new elog | For some reason the new elog does not look
exactly like it should.
1) Some of the
editing features are not available.
2) |
|
|
1263
|
Mon Feb 2 12:35:22 2009 |
Alberto | Configuration | General | New Elog 2.7.5 in Service on Nodus | I moved the 40m, the Adhikari Lab and the
SUS elogs from Dziban (located in Millikan's
6th floor) to our gateway server Nodus. In |
|
|
1262
|
Fri Jan 30 19:38:57 2009 |
Kakeru | Update | PSL | ISS Bad | Kakeru, Peter
We try to improve ISS bord, but there isn't |
|
|
1261
|
Fri Jan 30 17:30:31 2009 |
Alberto, Josephb | Configuration | Computers | New computer Ottavia set up | Alberto, Joseph,
Today we installed the computer that some |
|