| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
213
|
Mon Jul 21 01:02:43 2014 |
Koji | Mechanics | Characterization | Some structual mode analysis | Prisms
Fundamental: 12.3kHz Secondary: 16.9kHz
|
6x |
|
120
|
Mon May 6 19:31:51 2013 |
Koji | Optics | Characterization | Spot position measurement on the diode mounts | Measurement Order: DCPD2->DCPD1->QPD1->QPD2
DCPD1: 1.50mm+0.085mm => Beam
0.027mm too low |
|
|
121
|
Wed May 8 15:08:57 2013 |
Koji | Optics | Characterization | Spot position measurement on the diode mounts | Remeasured the spot positions:
DCPD1: 1.50mm+0.085mm => Beam
0.084mm too high |
|
|
158
|
Tue Aug 27 17:02:31 2013 |
Koji | Mechanics | Characterization | Spot position measurement on the diode mounts | After the PZT test, the curved mirrors
were aligned to the cavity again.
In order to check the height of the |
|
|
180
|
Mon Mar 3 02:46:21 2014 |
Koji | General | Characterization | Spot positions scanned | Spot positions on CM1 and CM2 scanned according
to the recipes provided by the previous entry.
The best result obtained was: |
|
|
168
|
Fri Sep 13 15:09:20 2013 |
Koji | General | General | Sprinkler installation: done | A sprinkler head was installed on the HEPA
enclosure. The head is covered with a plastic
cap. |
|
|
218
|
Tue Sep 9 20:59:19 2014 |
Koji | Mechanics | Characterization | Structural mode analysis for the PZT mirror | Structural analysis of the PZT mirror with
COMSOL.
Inline figures: Eigenmodes |
6x |
|
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 |
|
|
192
|
Fri Jun 27 18:51:33 2014 |
Koji | General | General | Supply | PTOUCH TAPE (12mm white) x 2
9V batteries |
|
|
453
|
Fri Nov 11 19:07:48 2022 |
Koji | Supply | General | Supply Order | Clean Supply Ordered
TexWipe TX8410 AlphaSat
Vectra Alpha 10 50 sheets x 12 pk (VWR |
|
|
396
|
Fri Oct 9 01:01:01 2020 |
Koji | General | General | TFT Monitor mounting | To spare some room on the optical table,
I wanted to mount the two TFT monitor units
on the HEPA enclosure frame. |
|
|
397
|
Fri Oct 16 00:53:29 2020 |
Koji | General | General | TFT Monitor mounting | The image flipping of the display unit
was fixed. The vendor told me how to fix
it. |
|
|
470
|
Mon Dec 19 18:51:50 2022 |
Koji | Optics | Characterization | TMS measurement with the PZT voltages altered | [Camille, Koji] Log of
the work on Dec 15, 2023
The vertical and horizontal |
|
|
10
|
Mon Jul 23 17:15:14 2012 |
Koji | Clean | General | Talking with Margot | I consulted with Margot about the cleaning
of the optics
Optics are considered |
|
|
86
|
Thu Mar 28 03:37:07 2013 |
Zach | Optics | Configuration | Test setup input optics progress | [Lisa, Zach]
Last night (Tuesday), I finished
setting up and aligning most of the input |
|
|
212
|
Sun Jul 20 17:20:39 2014 |
Koji | General | General | The 3rd (LIO) OMC was shipped out to LHO | The 3rd (LIO) OMC was shipped out to LHO
on Friday (Jul 18) Morning.
At LHO |
|
|
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. |
|
|
404
|
Mon Nov 23 23:17:19 2020 |
Koji | Electronics | Characterization | The dark noise of the Q3000 QPDs | The dark noise levels of the four Q3000
QPDs were measured with FEMTO DLPCA200 low
noise transimpedance amp. |
|
|
405
|
Tue Nov 24 10:45:07 2020 |
gautam | Electronics | Characterization | The dark noise of the Q3000 QPDs | I see that these measurements are done
out to 100 kHz - I guess there is no reason
to suspect anything at 55 MHz which is where |
|
|
406
|
Tue Nov 24 12:27:18 2020 |
Koji | Electronics | Characterization | The dark noise of the Q3000 QPDs | The amplifier BW was 400kHz at the gain
of 1e7 V/A. And the max BW is 500kHz even
at a lower gain. I have to setup something |
|
|
473
|
Wed Jan 25 23:51:04 2023 |
Koji | General | General | The items packed for Downs | Qty1 1/2 mounts
Qty2 prism mounts
Qty6 gluing fixures |
|
|
421
|
Thu Jul 21 17:47:00 2022 |
Koji | General | General | The profile of the beam incident on the fiber input coupler | The profile of the beam incident on the
fiber input
The fiber input was deflected by |
|
|
413
|
Tue Jun 28 16:13:34 2022 |
Koji | General | General | The small optical table not small enough to get out | The table width was an inch too large compared
to the door width. We need to tilt the table
and it seemed too much for us. Let's |
|
|
50
|
Wed Jan 2 07:35:55 2013 |
Koji | Optics | Characterization | Thickness of a curved mirror | Measured the thickness of a curved mirror:
Took three points separated by 120
degree. |
|
|
177
|
Tue Dec 10 16:41:51 2013 |
Koji | General | General | To Buy | Masks / Wipes => done |
|
|
200
|
Mon Jul 7 01:36:03 2014 |
Koji | General | General | To Do | Optical tests
Cleaning
Power Budget
|
|
|
204
|
Thu Jul 10 08:34:57 2014 |
Koji | General | General | To Do | Optical tests
Cleaning
Power Budget
|
|
|
2
|
Sat Jun 16 08:53:09 2012 |
Koji | General | General | To Do List | Facility
Work
|
|
|
448
|
Fri Aug 26 22:29:02 2022 |
Koji | General | General | Tool Shipping Prep | Shipping preparation for the LLO
trip
Started
July 15, 2022 and finished Aug 30. So it |
|
|
4
|
Wed Jun 20 20:37:45 2012 |
Zach | Optics | Configuration | Topology / parameter selection | EDIT (ZK): All the plots here were generated |
8x |
|
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 |
|
|
462
|
Mon Nov 21 19:13:35 2022 |
Koji | General | General | Transmission measurement (2nd deep cleaning of OMC #1) | OMC Transmission measurement after
the 2nd deep cleaning
The 2nd deep cleaning didn't |
|
|
134
|
Fri May 31 14:07:54 2013 |
Koji | Optics | Characterization | Transverse Mode Spacing measurement afte the baking | Measurement for pitch
Free Spectral Range
(FSR): 264.9703 +/− 0.0007 MHz |
|
|
265
|
Mon Aug 22 12:58:16 2016 |
Koji | General | General | UV bond samples -> Garilynn | - FS base + Mounting Prism
- FS or SF2 1/2" piece + FS
or SF2 1/2" piece |
|
|
62
|
Thu Feb 7 23:01:45 2013 |
Koji | Optics | Characterization | UV epoxy gluing test | [Jeff, Yuta, Koji]
Gluing test with UV-cure epoxy
Optocast 3553-LV-UTF-HM |
|
|
89
|
Mon Apr 1 03:23:48 2013 |
Koji | Optics | General | UV power calibration | [Koji Lisa Jeff Zach]
Eric G bought a UV power meter from
American Ultraviolet. |
|
|
239
|
Sun Sep 6 16:50:51 2015 |
Koji | Electronics | General | Unit test of the EOM/AOM Driver S1500118 | TEST
Result: S1500118
Additional |
|
|
11
|
Tue Jul 24 11:41:29 2012 |
Koji | General | General | Useful references | Nicolas Smith,
LIGO Document T0900383-v1
|
|
|
32
|
Wed Nov 7 01:28:20 2012 |
Koji | Optics | Characterization | Wedge angle test (A1) | Wedge
angle test
Result: Wedge angle of Prism A1: |
|
|
56
|
Sat Jan 19 20:47:41 2013 |
Koji | Optics | Characterization | Wedge measurement with the autocollimator | The wedge angle of the prism "A1"
was measured with the autocollimator (AC).
The range of the AC is 40 arcmin. |
|
|
59
|
Mon Feb 4 00:39:08 2013 |
Koji | Optics | Characterization | Wedge measurement with the autocollimator and the rotation stage | Method:
Mount the tombstone prism
on the prism mount. The mount is fixed on |
|
|
60
|
Wed Feb 6 02:34:10 2013 |
Koji | Optics | Characterization | Wedge measurement with the autocollimator and the rotation stage | Measurement:
A6: α
= 0.665 deg, β = +3.0 arcmin (1.5 div |
|
|
66
|
Fri Mar 1 23:52:18 2013 |
Koji | Optics | Characterization | Wedge measurement with the autocollimator and the rotation stage | Measurement:
E1: α =
0.672 deg, β = +0.0 arcmin (0 div up)
|
|
|
53
|
Thu Jan 10 18:37:50 2013 |
Koji | Optics | Characterization | Wedging of the PZTs | Yesterday I measured the thickness of the
PZTs in order to get an idea how much the
PZTs are wedged. |
|
|
373
|
Thu Aug 29 11:51:49 2019 |
shruti | Optics | Characterization | Wedging of the debonded PZTs - Calculation | Using the measurements of PZTs 12,13 taken
by Stephen, I estimated the wedging angle
and orientation following Section 2.3.1 of |
|
|
371
|
Thu Aug 22 12:35:53 2019 |
Stephen | Optics | Characterization | Wedging of the debonded PZTs 2019 August | Wedge and thickness measurements of PZTs
12 and 13 took place after debonding and
cleaning - results are shown in the first |
|