| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
1978
|
Tue Sep 8 20:15:33 2009 |
rana, jenne | Summary | PSL | RC temperature servo: Heater Voltage noise | We measured the voltage noise of the
heater used to control the RC can temperature.
It is large. |
|
|
1993
|
Fri Sep 18 16:26:02 2009 |
steve | Summary | PSL | Neslab chiller is OK | Rob found puddles of water very close to
the chiller during lunch time. We raised
the unit and took the side cover off. All |
|
|
1999
|
Thu Sep 24 20:17:05 2009 |
rana | Summary | LSC | Comparison of Material Properties for the new RFPD Mounts |
|
|
|
2043
|
Fri Oct 2 15:24:29 2009 |
sanjit, rana | Summary | IOO | mcwfs centered | we set the offsets for the MCWFS DC and
for the MCWFS demod outputs and then turned
off the lights put the MZ at half fringe |
|
|
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 |
|
|
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. |
|
|
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. |
|
|
2094
|
Thu Oct 15 01:21:31 2009 |
rana | Summary | COC | Thermal Lensing in the ITM | Thermal lensing formula:
|
|
|
2097
|
Thu Oct 15 09:23:07 2009 |
steve | Summary | Locking | never had it so good | Awesome 5 hrs of locking Rob! |
|
|
2100
|
Thu Oct 15 17:12:00 2009 |
rana | Summary | Locking | never had it so good |
|
|
|
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. |
|
|
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
|
|
|
2118
|
Mon Oct 19 14:48:15 2009 |
rana, rob | Summary | Electronics | piezo jena measuring box | Attached is the schematic of the Piezo Jena
driver measuring box made in a Pomona box:
|
|
|
2130
|
Wed Oct 21 16:18:12 2009 |
Steve | Summary | SAFETY | LIGO Safety Officers visited the 40m | David Nolting, chief LIGO Safety Officer
and his lieutenants from LLO and LHO paid
homage to the 40m lab this morning. |
|
|
2137
|
Fri Oct 23 09:13:45 2009 |
steve | Summary | VAC | RGA scan | Pump down #66 is 435 days old. RGA scan
is normal. New maglev is fine. New UPS is
in place but not hooked up to communicate. |
|
|
2157
|
Wed Oct 28 17:20:21 2009 |
rana | Summary | COC | ETM HR reflectivity plot | This is a plot of the R and T of the existing
ETM's HR coating. I have only used 1/4 wave
layers (in addition to the standard 1/2 wave |
|
|
2231
|
Tue Nov 10 21:46:31 2009 |
rana | Summary | Computers | Test Point Number Mapping |
|
|
|
2247
|
Thu Nov 12 02:02:18 2009 |
rana | Summary | LSC | Arm Locking with no feedback to the ETM or ITM | Steps:
1) Turn off feedback to ETMY (the
ETMY button on the LSC screen). |
|
|
2283
|
Tue Nov 17 15:54:34 2009 |
rana | Summary | PEM | 40 days of weather | the inside temperature is alarming at the
red level today - should check if the HIHI
value is set correctly |
|
|
2286
|
Tue Nov 17 21:10:35 2009 |
rana | Summary | Electronics | Busby Low Noise Box: Photos and Upgrades | |
|
|
2288
|
Wed Nov 18 00:38:33 2009 |
rana | Summary | Electronics | Voltage Noise of the SR560's OUTPUTs (the back panel) | I've
measured the voltage noise of the SR560's
lead acid battery outputs; they're not so |
|
|
2304
|
Fri Nov 20 00:18:45 2009 |
rana | Summary | Cameras | Video MUX Selection Wiki page | Steve is summarizing the Video Matrix
choices into this Wiki page:
http://lhocds.ligo-wa.caltech.edu:8000/40m/Electronics/VideoMUX |
|
|
2314
|
Mon Nov 23 16:28:12 2009 |
steve | Summary | Cameras | Video swicher options |
|
|
|
2406
|
Sun Dec 13 20:50:45 2009 |
rana | Summary | IOO | Mach Zender Calibration | I ramped the MZ PZT (with the loop disabled
on the input switch) to calibrate it. Since
the transmission has been blocked, I used |
|
|
2407
|
Sun Dec 13 23:18:09 2009 |
rana | Summary | IOO | Displacement noise on the PSL table | For the Laser Gyro, I wondered how much
mechanical noise we might get with a non-suspended
cavity. My guess is that the PMC is better |
|
|
2436
|
Mon Dec 21 01:14:08 2009 |
rana | Summary | Electronics | Noise measurement of the Rai Weiss FET preamp box | I shorted the input to the box and
then put its output into the SR560 (low noise,
G = 100, AC). I put the output of the SR560 |
|
|
2452
|
Sat Dec 26 19:22:13 2009 |
Koji | Summary | General | Mode coupling of two astigmatic beams | In this note, amplitude and power couplings
of two astigmatic (0,0)-th order gaussian
modes are calculated. |
|
|
2499
|
Sun Jan 10 23:22:56 2010 |
Jenne | Summary | General | Scattering Measurements of 35W Beam Dumps | On Friday, Rana and I measured the scatter coming from |
|
|
2507
|
Tue Jan 12 09:14:52 2010 |
steve | Summary | General | Scattering Measurements of 35W Beam Dumps |
What was the power level, polarization
and beam size at beam trap? |
|
|
2511
|
Tue Jan 12 14:28:01 2010 |
steve | Summary | Environment | lab temp of 7 years |
|
|
|
2514
|
Thu Jan 14 11:44:06 2010 |
josephb | Summary | Computers | Memory locations for TST model for ITMY | The main communications data structure
is RFM_FE_COMMS, from the rts/src/include/iscNetDsc40m.h
file. The following comments regard |
|
|
2535
|
Thu Jan 21 10:09:27 2010 |
Koji | Summary | IOO | Photos of the optical tables | I made a wiki page dedicated for the photos
of the optical tables.
The current layouts were uploaded. |
|
|
2539
|
Thu Jan 21 15:16:16 2010 |
josephb, koji | Summary | Computers | Megatron used to lock Y arm | We
succeeded in having a stable single arm (Y)
lock using Megatron to replace c1iscey.
Now |
|
|
2583
|
Tue Feb 9 17:18:45 2010 |
josephb | Summary | Computers | Locking Y arm successful with fully replaced front-end for ITMY | We were able to lock the Y-arm using Megatron
and the RCG generated code, with nothing
connected to c1iscey. |
|
|
2584
|
Tue Feb 9 17:51:48 2010 |
Jenne | Summary | IOO | Input Mode Matching Telescope design is complete | The upgrade's input mode matching telescope
design is complete. A summary document
is on the MMT |
|
|
2588
|
Wed Feb 10 23:44:56 2010 |
Koji | Summary | COC | Phase Map Analysis | In the middle of the last month, Kiwamu
and I went to Garilynn's lab to measure the
phase maps of the new ITMs and SRMs. |
|
|
2645
|
Sun Feb 28 16:45:05 2010 |
rana | Summary | General | Power ON Recovery |
Turned ON the RAID above linux1.
Hooked up a monitor and keyboard and
then turned ON linux1.
After |
|
|
2664
|
Tue Mar 9 09:32:31 2010 |
Koji | Summary | General | Wideband measurement of Fast PZT response | I have measured a wideband response
of the fast PZT in the LWE NPRO 700mW in
the Alberto's setup. |
|
|
2682
|
Thu Mar 18 15:33:17 2010 |
kiwamu | Summary | Electronics | advantege of our triple resonant EOM | In
this LVC meeting I discussed about triple
resonant EOMs with Volker who was a main |
|
|
2683
|
Thu Mar 18 19:00:04 2010 |
Koji | Summary | Electronics | advantege of our triple resonant EOM | Did you find what is the merit of their
impedance matching technique?
|
|
|
2688
|
Sat Mar 20 18:34:19 2010 |
kiwamu | Summary | Electronics | RE:advantege of our triple resonant EOM | Yes, I found it.
Their advantage is that their circuit
is isolated at DC because of the input capacitor. |
|
|
2692
|
Mon Mar 22 02:03:57 2010 |
rana | Summary | Electronics | UPDH Box #17: Ready | It took too long to get this box ready
for action. I implemented all of the changes
that I made on the previous one (#1437). |
|
|
2693
|
Mon Mar 22 10:07:30 2010 |
Koji | Summary | Electronics | UPDH Box #17: Ready | For your reference: Voltage noise of LM7815/LM7915
(with no load) |
|
|
2720
|
Sun Mar 28 20:05:33 2010 |
rana | Summary | PSL | FSS Work from Sunday: AOM/VCO level set wrong | Just before working on the FSS today, I
noticed that the VCO RF output level was
set incorrectly. |
|
|
2721
|
Sun Mar 28 20:51:31 2010 |
rana | Summary | PSL | FSS Work from Sunday: Cavity Suspension is Ridiculously Undamped! | What
is the Transfer Function of the suspension |
|
|
2722
|
Sun Mar 28 23:17:46 2010 |
rana | Summary | PSL | FSS Work from Sunday: noise spec | This is the error point spectrum - it is
filled with huge multiples of ~75 kHz as
Yoichi noticed a couple years ago. |
|
|
2723
|
Sun Mar 28 23:47:47 2010 |
rana | Summary | PSL | FSS Work from Sunday: Open Loop Gain | I measured the open loop gain of the FSS
(as usual, I have multiplied the whole OLG
by 10dB to account for the forward loop gain |
|
|
2724
|
Mon Mar 29 01:11:33 2010 |
rana | Summary | PSL | FSS Work from Sunday: RF Out Spectrum | I measured the RF spectrum coming out
the FSS RFPD to look for saturations - its
close to the hairy edge. This is with |
|
|
2726
|
Mon Mar 29 02:07:50 2010 |
Koji | Summary | PSL | FSS Work from Sunday: Open Loop Gain |
|
|
|
2735
|
Tue Mar 30 21:11:42 2010 |
kiwamu | Summary | Green Locking | conversion efficiency of PPKTP | With a
30mm PPKTP crystal the conversion efficiency |
|