| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
278
|
Fri May 26 21:53:20 2017 |
Koji | General | Configuration | Trans RF PD setup | Recent work
- DC output of the trans RF PD
was connected to the BNC patch panel. => |
|
|
279
|
Tue Jun 6 00:49:48 2017 |
Koji | General | Configuration | Trans RF PD setup | Last week, I further worked on the RF system
to install 20dB coupler on the agilent unit
and setup the R channel. This allowed me |
|
|
280
|
Tue Jun 6 22:00:36 2017 |
Koji | General | Configuration | Trans RF PD setup | - Replaced the PZT with the one used from
the beginning. This must be PZT #21. After
the replacement, the spot positions look |
|
|
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. |
|
|
284
|
Sat Jul 1 21:33:18 2017 |
Koji | General | General | Some purchase notes | - Forgot to close the cylinder valve...
v HEPA prefilter (20"x20"x1"
MERV 7) |
|
|
285
|
Wed Jul 5 16:59:44 2017 |
Koji | General | General | The OMC #002 was packed | [Stephen Koji]
The OMC #002 was packed for the
transportation to Downs. |
|
|
287
|
Sat Jul 29 21:42:51 2017 |
Koji | Electronics | Characterization | PDH amp | The polarities indicated in the right circuits
were opposite, obviously. |
|
|
288
|
Fri Sep 8 15:14:05 2017 |
Koji | Facility | General | Preparation for the plumbing work | [Steve, Aaron, Koji]
We've finished the preparation
for the forthcoming plumbing work on (nominally) |
7x |
|
289
|
Mon Nov 27 20:24:24 2017 |
Koji | General | General | A former LHO PD (Trans) removed from the OMC #002 for the shipment to Stockholm | Attachment 1: The PD was
removed from the transmission side of the
OMC #002 (former LHO OMC - the one blasted |
6x |
|
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)
|
|
|
296
|
Wed May 30 16:40:38 2018 |
Koji | Mechanics | Characterization | EOM mount stability test | https://awiki.ligo-wa.caltech.edu/wiki/EOM_Mount_Stability |
|
|
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 |
|
|
298
|
Mon Jul 2 11:30:22 2018 |
Koji | Electronics | Characterization | 3IFO EOM impedance measurement | [Rich Koji]
3IFO EOM (before any modification)
was tested to measure the impedance of each |
|
|
299
|
Mon Jul 2 12:29:01 2018 |
Koji | Electronics | Characterization | Impedances of individual components (3IFO EOM) | [Rich Koji]
The impedances of the individual
components from the 3IFO EOM (before modification) |
|
|
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 |
|
|
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 |
|
|
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) |
|
|
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 |
|
|
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 |