| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
245
|
Tue Dec 15 13:38:34 2015 |
Koji | Electronics | Characterization | EOM Driver linearity check | Linearity of the EOM driver was
tested. This test has been done on Nov 10,
2015. |
|
|
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 |
|
|
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 |
|
|
242
|
Wed Sep 9 01:58:34 2015 |
Koji | Optics | Characterization | PBS Transmission measurement | Calcite Brewster PBS Continued
The
transmission loss of the Calcite brewster |
|
|
241
|
Tue Sep 8 11:18:10 2015 |
Koji | Optics | Characterization | PBS Transmission measurement | Motivation: Characterize
the loss of the Calcite Brewster PBS.
Setup: (Attachment |
|
|
240
|
Tue Sep 8 10:55:31 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF AM Measurement Unit E1500151 ~ 37MHz OCXO AM measurement | Test sheet: https://dcc.ligo.org/LIGO-E1400445
Test Result (S1500114): https://dcc.ligo.org/S1500114 |
|
|
239
|
Sun Sep 6 16:50:51 2015 |
Koji | Electronics | General | Unit test of the EOM/AOM Driver S1500118 | TEST
Result: S1500118
Additional |
|
|
238
|
Fri Aug 28 02:14:53 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF AM Measurement Unit E1500151 ~ 37MHz OCXO AM measurement | In order to check the noise level
of the RFAM detector, the power and cross
spectra for the same signal source |
|
|
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: |
|
|
236
|
Wed Aug 26 11:31:33 2015 |
Koji | Electronics | General | OMC DCPD in-vacuum electronics chain test | The noise levels of the output pins (pin1/pin6)
are measured. Note that the measurement is
done with SE. i.e. There was no common mode |
|
|
235
|
Thu Aug 20 01:35:01 2015 |
Koji | Electronics | General | OMC DCPD in-vacuum electronics chain test | We wanted to know the transimpedance
of the OMC DCPD at high frequency (1M~10M).
For this purpose, the OMC DCPD chain |
|
|
234
|
Mon Aug 10 12:09:49 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF AM Measurement Unit E1500151 | Still suffering from a power supply
issue!
I have been tracking the issues |
|
|
233
|
Mon Aug 10 11:57:17 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF AM Measurement Unit E1500151 | Spending some days to figure out how to
program CPLD (Xilinx CoolRunner II XC2C384).
I learned that the JTAG cable which |
|
|
232
|
Mon Aug 10 11:39:40 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF AM Measurement Unit E1500151 | Entry for Aug 6th, 2015
I faced with difficulties to operate
the RF AM detectors. |
|
|
231
|
Mon Aug 10 02:11:47 2015 |
Koji | Electronics | AM Stabilized EOM Driver | RF AM Measurement Unit E1500151 | This is an entry for the work on Aug 3rd.
LIGO
DCC E1500151 |
|
|
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 |
|
|
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 |
|
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 |
|
|
227
|
Wed Jul 22 09:43:01 2015 |
Koji | Electronics | AM Stabilized EOM Driver | Power supply test of the EOM/AOM Driver | Serial Number of the unit: S1500117
Tester: Koji Arai |
|
|
226
|
Tue Jul 21 20:20:12 2015 |
Koji | General | General | Item lending | Kate (ATF)
- 4ch color oscilloscope (Tektronix)
- Chopper controller |
|
|
225
|
Sat Jul 18 11:37:21 2015 |
Koji | Electronics | AM Stabilized EOM Driver | D0900848 power board ~ oscillation issue solved | Power Supply Board D0900848 was
oscillating. Here is the procedure how the
issue was fixed. |
6x |
|
224
|
Wed Jul 15 22:23:17 2015 |
Koji | Electronics | AM Stabilized EOM Driver | E1400445 first look | This is not an OMC related and even not
happening in the OMC lab (happening at the
40m), but I needed somewhere to elog... |
|
|
223
|
Wed Feb 18 21:51:23 2015 |
Koji | General | General | Notes on OMC Transportation Fixtures & Pelican | LLO has one empty OMC transportation fixture.
LHO has one empty OMC transportation
fixture. |
|
|
222
|
Wed Feb 4 20:07:24 2015 |
Koji | General | General | Item lending | Shipment to MIT (L. Barsotti, J. Miller)
1. UV Illuminator (LESCO Super
Spot MK III) |
|
|
221
|
Tue Feb 3 18:23:49 2015 |
Koji | General | General | Item lending | - The laser was removed and shipped to
LHO today.
- UV illuminator / fused silica |
|
|
220
|
Fri Jan 30 19:31:08 2015 |
Koji | General | General | Item lending | Gabriele:
PZT HV Amp
Evan: |
|
|
219
|
Sat Jan 17 11:40:04 2015 |
Koji | General | General | 3rd OMC completed | Jan 15, 2015 3rd OMC completed
The face caps of the DCPD/QPD cables
were installed (Helicoils inserted) |
|
|
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 |
|
217
|
Wed Aug 27 23:13:13 2014 |
Koji | Optics | Characterization | Collection of the power budgetting info | L1
OMC Cavity power budget
H1 |
|
|
216
|
Tue Aug 5 13:03:25 2014 |
Koji | General | General | Missing cable components | DCPD Connector Face: Qty2 https://dcc.ligo.org/LIGO-D1201276
QPD Connector Face: Qty2 https://dcc.ligo.org/LIGO-D1201282
PD faster: 92210A07 Qty 4: MCMASTER |
|
|
215
|
Mon Aug 4 18:59:50 2014 |
Koji | General | General | A memorandom | On breadboarfd cabling for 3IFO OMC
D1300371 - S1301806
D1300372 - S1301808 |
|
|
214
|
Thu Jul 31 15:07:53 2014 |
Koji | General | General | Item lending | Tara: Laser Safety goggle ->
Returned
Evan: |
|
|
213
|
Mon Jul 21 01:02:43 2014 |
Koji | Mechanics | Characterization | Some structual mode analysis | Prisms
Fundamental: 12.3kHz Secondary: 16.9kHz
|
6x |
|
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 |
|
|
211
|
Sun Jul 20 17:19:50 2014 |
Koji | Mechanics | Characterization | I1OMC vibration test ~ 2nd round | Improved
vibration measurement of the OMC
Improvement |
9x |
|
210
|
Thu Jul 17 02:19:20 2014 |
Koji | Mechanics | Characterization | I1OMC vibration test | Summary
- The breadboard has a resonance
at 1.2kHz. The resonant freq may be chagned |
6x |
|
209
|
Tue Jul 15 03:34:16 2014 |
Koji | Optics | Characterization | OMC backscatter measurement | Backscatter
measurement ~ 2nd round
Summary |
|
|
208
|
Tue Jul 15 03:00:42 2014 |
Koji | Optics | Characterization | OMC backscatter measurement | Presence of the misaligned SRM (T=20%)
was forgotten in the previous entry.
This effectively reduces the OMC reflectivity |
|
|
207
|
Sun Jul 13 17:46:28 2014 |
Koji | Optics | Characterization | OMC backscatter measurement | Backscattering
reflectivity of the 3rdOMC was measured.
Attached: Measurement setup |
|
|
206
|
Fri Jul 11 00:06:33 2014 |
Koji | Optics | Characterization | I1OMC PD | DCPD#
DCPD1 DCPD2
Housing# |
|
|
205
|
Thu Jul 10 23:22:28 2014 |
Koji | Optics | Characterization | I1OMC QPD | QPD#
QPD1
QPD2 |
|
|
204
|
Thu Jul 10 08:34:57 2014 |
Koji | General | General | To Do | Optical tests
Cleaning
Power Budget
|
|
|
203
|
Thu Jul 10 01:39:38 2014 |
Koji | Electronics | General | PZT wire | Rich came to the OMC lab. Pins for the
mighty mouse connector were crimped on the
4 PZT wires. |
|
|
202
|
Tue Jul 8 18:54:54 2014 |
Koji | Mechanics | Characterization | PZT characterization | Each PZT was swept with 0-150V 11Hz triangular
wave.
Time series data for 0.2sec was recorded |
|
|
201
|
Tue Jul 8 04:08:06 2014 |
Koji | General | General | Expoxy reapplication for beam dumps | Firstly, the excess epoxy was removed using
a cleaned razor balde
|
|
|
200
|
Mon Jul 7 01:36:03 2014 |
Koji | General | General | To Do | Optical tests
Cleaning
Power Budget
|
|
|
199
|
Sun Jul 6 08:31:14 2014 |
Koji | Optics | Characterization | HOM measurement with PZT vol swept | 3rd OMC, HOM diagram at PZT1=0V and PZT2=50V.
First coincidence with the carrier
is the 32nd-order carrier mode. Very good. |
|
|
198
|
Sun Jul 6 03:56:40 2014 |
Koji | Optics | Characterization | HOM measurement with PZT vol swept | Cavity FSR/TMS measurement (2014/7/5) with
PZT voltages swept from 0V to 200V (50V step) |
|
|
197
|
Sun Jul 6 02:46:20 2014 |
Koji | Optics | Characterization | OMC power budget | 3rd OMC power budget (2014/7/2)
Input power: 34.8mW
|
|
|
196
|
Sun Jul 6 02:45:56 2014 |
Koji | Optics | General | FSR Measurement | 3rd OMC FSR / Finesse measurement
RF AM was injected by detuning a
HWP. |
|