| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
3268
|
Thu Jul 22 14:07:20 2010 |
kiwamu | Update | PSL | PSL front end machine | It
looks like something wrong happened around
the PSL front end. One |
|
|
3269
|
Thu Jul 22 15:59:29 2010 |
Alberto | Update | PSL | PSL front end machine |
|
|
|
3270
|
Thu Jul 22 18:18:54 2010 |
Alberto | Update | PSL | Problem Solved |
|
|
|
3271
|
Fri Jul 23 00:13:11 2010 |
rana | Update | PSL | Problem NOT REALLY Solved | So...who was working around the PSL rack
this morning and afternoon? Looks like there was |
|
|
3272
|
Fri Jul 23 08:15:59 2010 |
steve | Update | PSL | ref cavity ion pump | The ref cavity ion pump was running at
7.7kV instead of 5kV
This Digitel SPC-1 20 l/s ion pump |
|
|
3280
|
Fri Jul 23 16:02:16 2010 |
Rana | Update | PSL | Reference Cavity Insulation | This is the trend so far with the copper
foil wrapping. According to Megan's calculation,
we need ~1 mm of foil and the thickness of |
|
|
3282
|
Fri Jul 23 21:14:29 2010 |
Rana | Update | PSL | Reference Cavity Insulation | I wrapped another ~3 layers onto there.
It occurs to me now that we could just get
some 2mm thick copper plates made to fit |
|
|
3346
|
Sun Aug 1 21:40:27 2010 |
rana | Summary | PSL | FSS: SLOWDC response | I bet you thought that the NPRO slow actuator
response could be well represented by a pole
at ~0.1 Hz? Well, that's just what they want |
|
|
3364
|
Thu Aug 5 00:17:41 2010 |
Koji | Update | PSL | PSL preparation work | We start the work on the cables at around
the PSL table.
|
|
|
3369
|
Thu Aug 5 17:59:23 2010 |
Koji | Update | PSL | Cable removal from the control room | [Alberto, Kiwamu, and Koji]
We removed the BNC cables from the
control room. |
|
|
3370
|
Thu Aug 5 22:36:11 2010 |
Koji | Update | PSL | PSL preparation work | PSL preparation work
|
|
|
3371
|
Fri Aug 6 08:09:15 2010 |
steve | Update | PSL | PSL preparation work |
|
|
|
3381
|
Fri Aug 6 20:00:03 2010 |
Koji | Update | PSL | PSL preparation work | PSL preparation work report
Aug 6th
10am-5pm: (Steve |
|
|
3383
|
Sat Aug 7 11:07:44 2010 |
Koji | Configuration | PSL | MC kept locked / PMC control gain reduced to +13dB | Jenne asked us to keep th MC locked
and let the seismometers happy through this
weekend. |
|
|
3391
|
Tue Aug 10 05:56:07 2010 |
Koji | Update | PSL | PSL Table Lifting Preparation | Work
on Aug 9th
Steve, Jenne,
Koji, Alberto, Aidan, Jan, Sharmila, Katherine
From |
|
|
3451
|
Fri Aug 20 17:46:30 2010 |
rana | Update | PSL | 40m PSL Upgrade Layout v0.3 | http://lhocds.ligo-wa.caltech.edu:8000/40m/PSL/LayoutUpgrade
P-pol = purple
S-pol = red |
|
|
3463
|
Tue Aug 24 12:03:57 2010 |
rana | Update | PSL | PSL Upgrade: Mode Matching from PMC to IMC | I used the free software called 'ABCD'
for Mac to construct this mode matching solution
for going from the PMC to the IMC. |
|
|
3469
|
Wed Aug 25 15:32:52 2010 |
rana | Update | PSL | PSL Upgrade: Mode Matching from PMC to IMC | In a manner similar to the now classic
'Mode Matching from PMC to IMC' entry, I
have calculated the lenses and positions |
|
|
3470
|
Wed Aug 25 15:42:01 2010 |
Jenne | Update | PSL | PSL Upgrade: Mode Matching from PMC to IMC | Thoughts on where to take the pickoff for
the SHG for the PSL-green? We discussed
today at the meeting the possibility of putting |
|
|
3482
|
Fri Aug 27 22:09:37 2010 |
Jenne | Update | PSL | The beginnings of the new PSL | [Rana, Jenne]
Like |
|
|
3483
|
Sat Aug 28 01:02:31 2010 |
rana | Update | PSL | The beginnings of the new PSL | In fact, many of the mounts need
to be adapted to 4": the beefy
steering mirrors going into the PMC, the |
|
|
3487
|
Mon Aug 30 13:57:25 2010 |
Koji | Summary | PSL | PSL table vibrational performance after the upgrade | Jenne and Koji
Last week Jenne has put the accelerometers
on and under the PSL table immediately after |
|
|
3488
|
Mon Aug 30 18:22:00 2010 |
rana | Summary | PSL | PSL Enclosure is UNSTABLE | The lifting and resetting of the
BLUE PSL enclosure has made it unstable somehow.
When I push on it a little it rocks |
|
|
3491
|
Mon Aug 30 23:21:36 2010 |
rana | HowTo | PSL | 2W NPRO Mount designed with emachineshop.com software | To test out this website - emachineshop.com,
Jenne and I are designing some of the mounts
for the new beam height. |
|
|
3500
|
Tue Aug 31 19:46:00 2010 |
rana | Update | PSL | PSL upgrade update |
Steve is handling the mount
height increase for the PMC and RC steering
mirrors, as well as a mount (non-steerable) |
|
|
3502
|
Wed Sep 1 08:28:43 2010 |
Koji | Update | PSL | PSL upgrade update |
|
|
|
3503
|
Wed Sep 1 08:36:59 2010 |
Koji | HowTo | PSL | 2W NPRO Mount designed with emachineshop.com software | 1. I can not see whether the attaching
surface is flat or not.
It should have ~1mm step to avoid |
|
|
3511
|
Thu Sep 2 01:44:13 2010 |
Jenne | Update | PSL | PSL beam hitting the PMC! | [Rana, Jenne]
More PSL progress.
The new laser was raised to a 4 inch |
|
|
3519
|
Fri Sep 3 06:55:42 2010 |
rana | Update | PSL | PSL beam hitting the PMC! | NPRO
Koji and I inspected and photographed
the laser after opening up its case. I then |
|
|
3523
|
Fri Sep 3 23:42:34 2010 |
Jenne | Update | PSL | PSL update of the day | Rana and I were poking around on the PSL
table today, getting a few more items raised
to the correct height. |
|
|
3525
|
Mon Sep 6 01:46:58 2010 |
rana | Update | PSL | PSL update of the day | To bypass the polarizer issue, I just used
cubes. One I took from the FSS-Refcav path
and the other from the power control part |
|
|
3542
|
Wed Sep 8 00:01:07 2010 |
rana, valera | Update | PSL | PMC update | We ran the cables for the PMC: The RF cable
for the 35.5 MHz drive was cheap and so we
swapped the 29.5 MHz cable for it. |
|
|
3543
|
Wed Sep 8 09:50:13 2010 |
rana | Update | PSL | PSL update | Also, Kiwamu has modified the layout drawing
to add the green PLL stuff. This has collapsed
the reference cavity's wave function placing |
|
|
3544
|
Wed Sep 8 11:46:53 2010 |
kiwamu | Update | PSL | update of the layout | I put some
green stuff on the layout drawing. |
|
|
3548
|
Thu Sep 9 05:58:04 2010 |
kiwamu | Update | PSL | mode matching from PMC to IMC | I started mode matching of the
beam going to IMC. The work is still going
on. |
|
|
3556
|
Fri Sep 10 02:35:30 2010 |
rana, kiwamu, valera, tara | Configuration | PSL | update | Over the last couple nights we got the
beam into the FSS path and all the way to
the IMC and out onto the AP table. |
|
|
3558
|
Sat Sep 11 22:42:07 2010 |
valera | Update | PSL | PSL update | - The PMC REFL PD was moved from the temporary
location to the one called for by the PSL
layout (picture attached). The leakage beams |
|
|
3566
|
Mon Sep 13 11:49:34 2010 |
kiwamu | Update | PSL | mode matching from PMC to IMC | I have been working on the mode matching
lenses which are sitting after the boradband
EOM. |
|
|
3568
|
Mon Sep 13 19:41:38 2010 |
rana | Update | PSL | FSS AOM alignment | The IR sensitive Olympus 570 camera gives
us a really nice view of these IR beams.
Its actually a lot better than what you can |
|
|
3570
|
Mon Sep 13 22:51:07 2010 |
tara,valera | Configuration | PSL | beam scan for RCAV | On Friday, Valera and I calculated the
modematching for reference cavity from AOM.
We scan the beam profile where the |
|
|
3573
|
Wed Sep 15 01:27:52 2010 |
rana, steve, valera | Update | PSL | FSS cables connected | - connected the TTFSS cables (FSS fast
goes directly to NPRO PZT for now)
- measured the reference cavity 21.5 |
|
|
3574
|
Wed Sep 15 01:58:28 2010 |
valera | Update | PSL | FSS locking | The RefCav is locked and aligned. I changed
the fast gain sign by changing the jumper
setting on the TTFSS board. The RefCav visibility |
|
|
3575
|
Wed Sep 15 03:08:26 2010 |
Koji | Update | PSL | FSS locking | Brilliant! This is the VERY way
how the things are to be conquered!
|
|
|
3587
|
Sun Sep 19 18:52:52 2010 |
rana | Configuration | PSL | NPRO SLOW servo settings updated for Innolight NPRO | Our new 2W Mephisto has a pretty zippy
"SLOW" temperature input. Tuning
the perl PID servo, I found that the best |
|
|
3591
|
Mon Sep 20 17:10:10 2010 |
steve | Configuration | PSL | enclosure beam guides to IFO are installed | The PSL out 2" OD beam guide
tube was cut 1.5" shorter to 13.5"
The 10" OD 0.25" |
|
|
3603
|
Thu Sep 23 23:24:43 2010 |
rana, johnny, tara | Summary | PSL | AM modulate AOM to measure RefCav Thermo-Optic coefficient | Big Johnny and I hacked a function
generator output into the cross-connect of
the 80 MHz VCO driver so that we could modulate |
|
|
3610
|
Mon Sep 27 00:33:50 2010 |
rana | Update | PSL | High Voltage Driver added to TTFSS -> NPRO | We added the Thorlabs HV Driver in
between the FSS and the NPRO today.
The FSS is locking with it, but we |
|
|
3618
|
Wed Sep 29 01:53:44 2010 |
rana | Update | PSL | paths broken and VCO turned off | I found that several linux libraries have
been moved around and disabled today. In
particular, I see a bunch of new stuff in |
|
|
3640
|
Fri Oct 1 21:34:14 2010 |
rana, tara | Update | PSL | High Voltage Driver added to TTFSS -> NPRO |
|
|
|
3641
|
Mon Oct 4 06:47:46 2010 |
rana, tara | Update | PSL | High Voltage Driver added to TTFSS -> NPRO | Inside the FSS box, the FAST path has a
~10 Hz pole made up from the 15k resistor
and the 1 uF cap before the output connector. |
|