| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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. |
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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 |
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|
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 |
|
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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... |
|
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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 |
|
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214
|
Thu Jul 31 15:07:53 2014 |
Koji | General | General | Item lending | Tara: Laser Safety goggle ->
Returned
Evan: |
|
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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
|
|
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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. |
|
|
195
|
Thu Jul 3 17:45:18 2014 |
Koji | General | General | Beam dump delamination | Here is the resolution.
I'll apply fillets of EP30-2 along
the edges of the black glass (See figure). |
|
|
194
|
Wed Jul 2 18:58:42 2014 |
Koji | General | General | Beam dump delamination | While the OMC breadboard was being inspected,
it was found that two out of five black-glass
beam dumps showed sign of delamination. |
|
|
193
|
Wed Jul 2 16:41:43 2014 |
Koji | General | General | OMC baking | OMC is back from the oven today.
To Do:
Optical tests |
|
|
192
|
Fri Jun 27 18:51:33 2014 |
Koji | General | General | Supply | PTOUCH TAPE (12mm white) x 2
9V batteries |
|
|
191
|
Fri Jun 27 12:29:50 2014 |
Koji | General | General | OMC baking | The OMC went into the oven at around 2PM
on Thursday. It will be baked at 80degC for
48 hours. |
|
|
190
|
Tue Jun 24 18:43:15 2014 |
Koji | General | General | ICS entries for the OMC baking/assembly | For baking:
Assembly Name aLIGO Output
Mode Cleaner |
|
|
189
|
Mon Jun 23 21:54:16 2014 |
Koji | Optics | General | All of the gluing completed | The bottom-side templates were removed.
The last beam dump was removed
TODO |
|
|
188
|
Fri Jun 20 18:59:12 2014 |
Koji | Optics | General | All of the invar blocks have been glued | All of the INVAR blocks have been glued.
I found thinner shims in the stock.
On Monday, the template will be removed. |
|
|
187
|
Thu Jun 19 23:16:50 2014 |
Koji | Optics | General | All of the prisms have been glued | - All of the PRISM mirrors have been glued
- 4 out of 5 beam dumps have been
glued |
|
|
186
|
Sat May 17 07:40:14 2014 |
Koji | Optics | Characterization | I1OMC cavity mirrors glued | I1OMC cavity mirrors were glued.
FSR = 264.82MHz => Lcav = 1.132m
(nominal 1.132m) |
|
|
185
|
Fri May 16 00:13:36 2014 |
Koji | Optics | Characterization | Cavity mirror gluing part 1 | BS1/FM1/FM2 for I1OMC were glued.
FM1 had to be intentionally rotated.
FM1 had to be intentionally shifted |
|
|
184
|
Wed May 14 02:15:15 2014 |
Koji | Optics | Characterization | FSR/TSM adjustment of the OMC cavity | 1. FSR was adjusted and measured with "the
golden arches" technique again.
FSR = 264.8412 MHz +/- 1400Hz => |
|
|
183
|
Mon May 12 22:43:02 2014 |
Koji | Optics | Characterization | Measured FSR/TSM of the OMC cavity | Data analysis of the FSR/TSM measruement
last week.
1. FSR was measured with "the |
|