| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
243
|
Thu Sep 10 04:03:42 2015 |
Koji | Optics | Characterization | More polarizer optics measurement (Summary) | Brewster calcite PBS (eLIGO
Squeezer OFI)
Loss L = 3600 +/- 200ppm |
|
|
244
|
Wed Sep 23 17:49:50 2015 |
Koji | Optics | Characterization | More polarizer optics measurement (Summary) | For the Glasgow PBS, the measurement has
been repeated with different size of beams.
In each case, the PBS crystal was |
|
|
247
|
Tue Dec 15 13:42:37 2015 |
Koji | Optics | Characterization | Dimensions / packaging of HQE PDs | The dimensions of a high QE PDs was measured
as well as the ones for C30665. (Attachment
4, Unit in mm) |
|
|
252
|
Sun Mar 6 02:13:28 2016 |
Koji | Optics | Characterization | PD glass reflections | On friday, I removed a glass cover of a
G30655 with a PD can cutter.
When a beam shoots a Perkin Elmer/Excelitas |
|
|
254
|
Sun Mar 13 22:02:09 2016 |
Koji | Optics | Characterization | HQEPD QE measurement (direct comaprison) | Direct comparison of the PD responsibities
We
can expect 5% increase of the QE with the |
|
|
255
|
Sat Mar 26 01:49:48 2016 |
Koji | Optics | Characterization | HQEPD QE | Calibration
of the transimpedance
Use KEITHLEY 2450 as a calibrated |
|
|
266
|
Tue Aug 23 23:36:54 2016 |
Koji | Optics | Characterization | Inspection of the damaged CM1 (prev H1OMC) | 1. Calum and GariLynn checking the CM1
defect from the front side.
2. Same as above |
7x |
|
267
|
Thu Aug 25 02:17:09 2016 |
Koji | Optics | Characterization | Inspection of the damaged CM1 (prev H1OMC) | Initial inspection results by Calum, et
al.
https://dcc.ligo.org/LIGO-E1600268 |
|
|
269
|
Fri Sep 9 19:43:32 2016 |
Koji | Optics | General | D1102211 OMC Diode Mount Glass Block went to Downs | D1102211 OMC Diode Mount Glass Block (11pcs)
have been given to Calum@Downs |
|
|
270
|
Mon Nov 21 21:19:20 2016 |
Koji | Optics | General | LWE NPRO Laser / Input Optics / Fiber Coupling | - About 1.5 month ago, an 700mW LWE NPRO
has been brought to OMC Lab.
- The SOP can be found here. |
|
|
271
|
Wed Dec 7 19:18:10 2016 |
Koji | Optics | General | LWE NPRO Laser / Input Optics / Fiber Coupling | FIber Input Mount 132deg
Fiber output mount 275deg
-> 525mW P: 517mW S: 8mW extinction |
|
|
277
|
Tue May 16 19:05:18 2017 |
Koji | Optics | Configuration | OMC SN002 fix - temporary optics | Working on the SN002 OMC fix. Checked the
inventory. I think I am using C8 mirror as
the new temporary CM1 and PZT24 as the new |
|
|
281
|
Fri Jun 23 01:58:11 2017 |
Koji | Optics | General | OMC #002 Repair - CM1 gluing | [Alena, Koji]
Jun 21: Alena and Koji
worked on gluing of the CM1 mirror on the |
6x |
|
282
|
Fri Jun 23 10:55:07 2017 |
Koji | Optics | General | Dust layer on black glass beam dumps? | I wondered why the black glass beam dumps
looked not as shiny as before. It was in
fact a layer of dusts (or contaminants) accumulated |
|
|
283
|
Sat Jul 1 15:29:57 2017 |
Koji | Optics | General | Black glass cleaning / Final bonding for the emergency repair for OMC #002 | [Alena, Koji]
Report of the work on June
30. |
|
|
291
|
Thu Feb 22 20:21:02 2018 |
Koji | Optics | Characterization | aLIGO EOM test | POSTED
to 40m ELOG |
|
|
292
|
Mon Apr 2 17:27:04 2018 |
Koji | Optics | Characterization | aLIGO EOM test | 2nd optical test http://nodus.ligo.caltech.edu:8080/40m/13725 |
|
|
294
|
Sat May 5 22:51:04 2018 |
Koji | Optics | General | 3IFO EOM Optical test | The 3IFO EOM test performed at
the 40m. Result: 40m
ELOG 13819 |
|
|
295
|
Tue May 15 19:53:45 2018 |
Koji | Optics | General | EOM Q comparison | Qs' were estimated with a lorentzian
function (eye fit)
|
|
|
297
|
Wed May 30 17:44:23 2018 |
Koji | Optics | Characterization | 3IFO EOM surface check | 3IFO EOM dark microscope images courtesy
by GariLynn and Rich
Attachment1/2: Hole #1 |
|
|
308
|
Sun Sep 23 19:42:21 2018 |
Koji | Optics | General | Montecarlo simulation of the phase difference between P and S pols for a modeled HR mirror | [Koji Gautam]
With Gautam's help,
I ran a coating design code for an HR mirror |
|
|
309
|
Thu Sep 27 20:19:15 2018 |
Aaron | Optics | General | Montecarlo simulation of the phase difference between P and S pols for a modeled HR mirror | I started some analytic calculations of
how OMC mirror motion would add to the noise
in the BHD. I want to make some prettier |
|
|
310
|
Thu Nov 1 19:57:32 2018 |
Aaron | Optics | General | Montecarlo simulation of the phase difference between P and S pols for a modeled HR mirror | I'm still not satisfied/done with the
solution to this, but this has gone too long
without an update and anyway probably someone |
|
|
311
|
Thu Jan 10 20:42:54 2019 |
Koji | Optics | Characterization | FSR / HOM Test of OMC SN002 | OMC SN002 = Former LHO OMC
which CM1 was destroyed by the lock loss
pulse in 2016. This OMC needs to be optically |
|
|
312
|
Thu Jan 10 20:45:00 2019 |
Koji | Optics | Characterization | PZT test cable | As OMC SN002 already has the PZTs connected
to the Mighty-Mouse connector, a test cable
with a female mighty-mouse connector was |
|
|
313
|
Sat Jan 12 22:49:11 2019 |
Koji | Optics | Characterization | PM-SM patch cable mode cleaning effect | Mode
cleaning capability of an optical fiber was
measured. The conclusion |
|
|
315
|
Sat Feb 2 16:17:13 2019 |
Koji | Optics | Characterization | Summary: OMC(001) HOM structure recalculation | Each peak of the transfer function measurement
was fitted again with a complex function:
|
|
|
316
|
Sat Feb 2 20:03:19 2019 |
Koji | Optics | Characterization | Summary: OMC(002) HOM structure recalculation (before mirror replacement) | OMC (002)
History: Measurement date
2013/10/11, Installed to L1 2013/XX |
|
|
317
|
Sat Feb 2 20:28:21 2019 |
Koji | Optics | Characterization | Summary: OMC(003) HOM structure recalculation | OMC (003)
History: Measurement date
2014/7/5, Stored for I1, Installed to H1 |
|
|
318
|
Sat Feb 2 20:35:02 2019 |
Koji | Optics | Characterization | Summary: OMC(002) HOM structure recalculation (after mirror replacement) | OMC (002) after repair
History:Mirror replacement
after the damage at H1. Measurement date |
|
|
322
|
Fri Apr 5 01:07:18 2019 |
Koji | Optics | Characterization | OMC(002): transmitted beam images | There was a concern that the transmission
from CM1 has additional fringes. The shape
of the transmitted beams from CM1, CM2, and |
|
|
323
|
Fri Apr 5 01:08:17 2019 |
Koji | Optics | Characterization | OMC(002): DCPD / QPD alignment | The beam height in the cavity became totally
different from the previous one and the shims
needed to be much thicker than before. This |
|
|
324
|
Fri Apr 5 20:50:54 2019 |
Koji | Optics | Characterization | OMC(002): QPD alignment | QPD#
QPD1
QPD2 |
|
|
336
|
Mon Apr 15 21:11:49 2019 |
Philip | Optics | Characterization | OMC(004): PZT testing for spare OMC | [Koji, Philip]
Today we tested the functionality
of the four remaining PZTs (11,12,13 and |
|
|
337
|
Tue Apr 16 11:36:36 2019 |
Koji | Optics | Characterization | OMC(004): PZT testing for spare OMC | Attachment 1: Shadow sensor
setup for the PZT displacement test
Attachment 2: |
9x |
|
338
|
Tue Apr 16 16:35:09 2019 |
Koji | Optics | Configuration | OMC(004): Glass breadboard selection | D1200105 SN006 was selected as
the breadboard for OMC(004).
The reason is the best parallelism |
|
|
340
|
Tue Apr 16 16:52:36 2019 |
Koji | Optics | Configuration | OMC(004): B Mirror selection | We are going to use B6 for the
DCPD BS (BS2), and B1 for the QPD BS (BS3).
Their role can not |
|
|
341
|
Tue Apr 16 17:24:56 2019 |
Koji | Optics | Configuration | OMC(004): E Mirror selection | We are going to use E6, E9, E11, and E14
for BS1, SM1, SM2, and SM3. They (and E18)
are all very similar. |
|
|
342
|
Tue Apr 16 21:16:11 2019 |
Koji | Optics | Characterization | OMC(004): PZT testing for spare OMC | After having dug into the past email, it
turned out that these wires were the ones
already replaced from the original teflonwires. |
|
|
345
|
Wed Apr 17 10:30:37 2019 |
Philip | Optics | General | OMC optical set-up day 1 | [Joe, Koji, Liyuan, Philip, Stephen]
Work done on 16.04.2019
|
|
|
346
|
Thu Apr 18 20:47:54 2019 |
Joe | Optics | | OMC initial alignment and locking | [Joe, Phillip, Koji, Stephen]
*draft post, please add anymore
info if I missed something* |
|
|
347
|
Fri Apr 19 09:21:07 2019 |
Philip | Optics | | Cleaning of OMC optics | ach[Joe, Phillip, Koji,
Stephen]
Work from 17.04.2019 |
|
|
349
|
Fri Apr 19 11:34:19 2019 |
Koji | Optics | | OMC initial alignment and locking | The spot on CM1 was found displaced by
3.4mm (horiz.) and 3.0mm (vert.)
in the upper right direction looking from |
|
|
350
|
Sat Apr 20 00:50:12 2019 |
Koji | Optics | Characterization | OMC(004): Spot positions | Similarly to OMC
ELOG 349 the spot positions after the
replacement of CM2 were measured (Attachment |
|
|
353
|
Tue Apr 23 10:21:12 2019 |
Joe | Optics | Configuration | Moving the spots to the centre of the curved mirrors | [Koji,Philip, Liyuan, Joe]
CM1:
We moved the curved mirrors to |
|
|
354
|
Wed Apr 24 13:58:51 2019 |
Joe | Optics | Characterization | OMC power budget and UV Epoxy Bonding of BS1 | [koji,philip,joe,liyuan,stephen]
need to add spot positions.
Mirrors: PZT11,PZT22, A14, A5 |
|
|
355
|
Thu Apr 25 15:05:19 2019 |
Joe | Optics | Characterization | Looking at PZT HOM spacing dependance and thinking about workflow | [koji, joe]
The template or glass breadboard
was wobbling, and we noticed that the caivty |
|
|
356
|
Wed May 1 15:40:46 2019 |
Koji | Optics | Characterization | OMC(004): Spot positions and the scattering | Tried a few things.
1. Replaced CM1 (PZT ASSY
#10=M21+PZT#22+C12) with PZT ASSY #7 (=M1+PZT#13+C13) |
|
|
357
|
Fri May 3 11:06:28 2019 |
Koji | Optics | Characterization | OMC(004): Spot positions and the scattering | Experiment on 5/1
- CM1 right knob was moved 1div (10um)
backward such that the spots were better |
|
|
359
|
Thu May 9 17:35:07 2019 |
Koji | Optics | General | Alignment strategy | Notes
on the OMC cavity alignment strategy
- x3=1.17 γ + 1.40 δ, x4=1.40 |
|