| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
302
|
Wed Jul 4 18:30:51 2018 |
Koji | Electronics | Characterization | EOM circuit models | The circuit models for the 3IFO EOM (before
mods) were made using LISO.
Then the modification plan was made |
|
|
303
|
Thu Jul 26 20:57:07 2018 |
Koji | Electronics | Characterization | 9MHz port tuned impedance | [Rich Koji]
The 9MHz port was tuned and the
impedance was measured. |
|
|
304
|
Tue Aug 7 15:43:12 2018 |
Koji | Electronics | Characterization | New LLO EOM stuffed | [Rich, Dean, Koji]
Stuffed all inductors for the new
LLO EOM. As the impedances were sensitive |
|
|
305
|
Wed Aug 8 17:32:56 2018 |
Rich Abbott | General | Characterization | Modulation Index Test Setup at 40m Lab | Attached is a block diagram of the test
setup used in the 40m lab to measure the
modulation index of the IO modulator |
|
|
306
|
Thu Aug 9 11:24:29 2018 |
Koji | General | Characterization | Modulation Index Test Setup at 40m Lab | [Rich Koji]
The impedances of the new LLO EOM
were measured with the beat note setup at |
|
|
307
|
Wed Aug 29 11:06:30 2018 |
Koji | General | General | RF AM RIN and dBc conversion | 0. If you have an RF signal whose waveform
is , the amplitude is constant and 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 |
|
|
314
|
Fri Feb 1 12:52:12 2019 |
Koji | Mechanics | General | PZT deformation simulation | A simple COMSOL simulation was run to see
how the PZT deforms as the voltage applied.
Use the geometry of the ring PZT |
|
|
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 |
|
|
319
|
Tue Mar 19 17:30:25 2019 |
Koji | General | Characterization | OMC (002) Test items | OMC #002 Optical tests
FSR
measurement (done, 2019/1/8-9, 2019/4/1)
|
|
|
320
|
Thu Mar 28 16:36:52 2019 |
Koji | Mechanics | Characterization | OMC(002) PZT characterization | As
performed in the ELOG 202, the PZTs of
the OMC 002 were tested. |
|
|
321
|
Thu Apr 4 20:07:39 2019 |
Koji | Supply | General | Purchase | == Office Depot ==
Really
Useful Box 9L x 6 (delivered) |
|
|
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 |
|
|
325
|
Fri Apr 5 23:30:20 2019 |
Koji | General | General | OMC (002) repair completed | OMC(002)
repair completed
When the cable harness of OMC(004) |
|
|
326
|
Wed Apr 10 19:22:24 2019 |
Koji | General | General | OMC(004): preparation for the PZT subassembly bonding | Preparation for the PZT subassembly
bonding (Section 6.2 and 7.3 of T1500060
(aLIGO OMC optical testing procedure) |
|
|
327
|
Thu Apr 11 10:54:38 2019 |
Stephen | General | General | OMC(004): preparation for the PZT subassembly bonding |
Quote:
|
|
|
328
|
Thu Apr 11 12:15:31 2019 |
Koji | Mechanics | Configuration | PZT sub assy mirror orientations | |
|
|
329
|
Thu Apr 11 21:22:26 2019 |
Koji | Mechanics | General | OMC(004): PZT sub-assembly gluing | [Koji Stephen]
The four PZT sub-assemblies were
glued in the gluing fixtures. There were |
|
|
330
|
Thu Apr 11 21:22:58 2019 |
Koji | General | General | OMC(004): PZT sub-assembly air baking | [Stephen Koji]
The baking of the PZT subassemblies
was more complicated than we initially thought. |
|
|
331
|
Sun Apr 14 23:58:49 2019 |
Koji | General | General | OMC(004): PZT sub-assembly post air-bake inspection | [Koji Stephen]
(Friday afternoon) We retrieved
the PZT sub-assemblies to the clean room. |
|
|
332
|
Mon Apr 15 00:08:32 2019 |
Koji | General | General | OMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #7) | Sub-ASSY
#7
Probably the best glued unit among |
6x |
|
333
|
Mon Apr 15 00:39:04 2019 |
Koji | General | General | OMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #8) | Sub-ASSY
#8
Probably the best glued unit among |
8x |
|
334
|
Mon Apr 15 01:07:30 2019 |
Koji | General | General | OMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #9) | Sub-ASSY
#9
The most fractured unit among four. |
7x |
|
335
|
Mon Apr 15 01:23:45 2019 |
Koji | General | General | OMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #10) | Sub-ASSY
#10
Attachment #1: Mounting |
|
|
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 |
|
|
339
|
Tue Apr 16 16:40:26 2019 |
Koji | General | Configuration | OMC(004): A Mirror selection | We are going to use A5 and A14
for FM1 and FM2. (The role of these
two can be swapped) |
|
|
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. |
|
|
343
|
Tue Apr 16 23:11:43 2019 |
Koji | General | General | Borrowed items from the other labs | Apr 16, 2019
Borrowed
two laser goggles from the 40m. (Returned |
|
|
344
|
Wed Apr 17 09:08:47 2019 |
Stephen | General | General | OMC(004): Unwrapping and preparing breadboard | [Stephen, Philip, Koji, Joe]
Breadboard D1200105 SN06 was selected
as described in eLOG |
|
|
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 |
|
|
348
|
Fri Apr 19 09:35:28 2019 |
Joe | General | | Adjusting cavity axis, re-alignment of OMC and locking | [koji,philip,
joe, liyuan,
steven] |
|
|
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 |
|
|
351
|
Mon Apr 22 09:54:21 2019 |
Joe | General | | Shortening cavity (A5,A14,PZT11,PZT22) to get closer to design FSR | [Koji,Joe,Philip,stephen]
in units 20um per div on the micrometer
[n.b. we reailised that its 10um per div |
|