| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
237
|
Fri Aug 28 01:08:14 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF AM Measurement Unit E1500151 ~ Calibration | Worked on the calibration of the
RF AM Measurement Unit.
The calibration concept is as follows: |
|
|
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. |
|
|
228
|
Wed Jul 22 10:15:14 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF test of the EOM/AOM Driver S1500117 | 7) Make sure the on/off RF button works,
=> OK
8) Make sure the power output doesn't |
|
|
229
|
Sat Jul 25 17:24:11 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF test of the EOM/AOM Driver S1500117 | (Calibration for Attachment 5 corrected
Aug 27, 2015)
Now the test procedure |
7x |
|
230
|
Tue Jul 28 18:36:50 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF test of the EOM/AOM Driver S1500117 | Final Test Result of S1500117:
https://dcc.ligo.org/LIGO-S1500117
After some staring the |
|
|
41
|
Mon Nov 19 13:33:14 2012 |
Koji | Optics | Characterization | Resuming testing mirror RoCs | In order to resume testing the curvatures
of the mirrors, the same mirror as the previous
one was tested. |
|
|
22
|
Fri Oct 5 03:39:58 2012 |
Koji | Optics | General | RoC Test setup | Based on Zach's experiment design, I wrote
up a bit more detailed optical layout for
the mirror test. |
|
|
6
|
Fri Jun 29 11:26:04 2012 |
Zach | Optics | Characterization | RoC measurement setup | Here is the proposed RoC measurement
setup. Koji tells me that this is referred
to as "Anderson's method". |
|
|
9
|
Sun Jul 22 15:56:53 2012 |
Zach | Optics | Characterization | RoC measurement setup | Here is a more detailed version of
the setup, so that we can gather the parts
we will need. |
|
|
30
|
Wed Oct 17 20:36:04 2012 |
Koji | Optics | General | RoC test cavity locked | The RoC test setup has been built on
the optical table at ATF.
|
|
|
16
|
Mon Aug 13 16:59:11 2012 |
Koji | Clean | General | Room Cleaning Log | Floor wiped with a wet wiper (Aug 13, 2012)
Floor wiped with a wet wiper (Aug
15, 2012) |
|
|
58
|
Tue Jan 22 17:56:32 2013 |
Koji | Mechanics | General | Rotary stage selection | Newport UTR80
Sensitivity: 4 arcsec
|
|
|
408
|
Thu May 20 17:03:50 2021 |
Koji | General | General | SRS LCR meter SRS720 borrowed from Downs | Item loan: SRS LCR meter SRS720 borrowed
from Downs. The unit is at the 40m right
now for testing with an excelitas PD. Once |
|
|
423
|
Fri Jul 22 17:41:01 2022 |
Koji | General | General | SRS LCR meter SRS720 returned to Downs | SRS LCR meter SRS720 was returned to Downs
as before.
|
|
|
370
|
Mon Jul 1 12:49:42 2019 |
Koji | Optics | Characterization | Scattering measurement of A and C mirrors | Liyuan's scattering measurement for
the A and C mirrors. |
|
|
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 |
|
|
36
|
Thu Nov 8 19:47:55 2012 |
Koji | Electronics | Configuration | Solder for PZTs | Rich saids:
I |
|
|
48
|
Mon Dec 31 03:10:09 2012 |
Koji | Optics | General | SolidWorks model of the OMC breadboard | |
|
|
52
|
Sun Jan 6 23:22:21 2013 |
Koji | Mechanics | General | SolidWorks model of the OMC suspension | |
|
|
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) |
|
|
138
|
Wed Jun 5 18:19:51 2013 |
Koji | General | General | Some recent photos from the OMC final test at CIT | Applying First Contact for the optics cleaning
|
|
|
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 |
|
|
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. |
|
|
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 |
|
|
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
|
|
|
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. => |
|