| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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. |
|
|
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 |
|
|
182
|
Thu Apr 17 21:39:25 2014 |
Koji | Optics | General | More alignment | STORY:
- The cavity mirrors have scattering
spots. The cavity alignment should have been |
|
|
181
|
Tue Mar 25 17:10:10 2014 |
Koji | Optics | Characterization | OMC spot position estimation | Spot positions were inferred from the photos |
|
|
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: |
|
|
179
|
Fri Feb 28 19:50:11 2014 |
Koji | General | General | Misalignment ABCD matrix for the aLIGO OMC | Relationship between mirror misalignment
and cavity mode shift was calculated.
The technique described in T0900647 |
|
|
178
|
Tue Feb 18 18:58:38 2014 |
Koji | General | General | LHO H1 OMC installation photos | LHO OMC installation photos
|
|
|
177
|
Tue Dec 10 16:41:51 2013 |
Koji | General | General | To Buy | Masks / Wipes => done |
|
|
176
|
Thu Nov 21 00:05:35 2013 |
Koji | General | General | H1OMC electronics arrangement | Checked the PZT arrangement: Mighty Mouse
Pin1&2 -> PZT2 (DCPD side), Mighty
Mouse Pin3&4 -> PZT1 (QPD side) |
|
|
175
|
Mon Nov 4 19:43:56 2013 |
Koji | General | General | H1OMC Packed | H1OMC PZT connector was replaced with the
correct one. This was the final step for
H1OMC. |
|
|
174
|
Wed Oct 23 02:45:07 2013 |
Koji | General | General | PD realignment | DCPD2 got misaligned during the cable installation.
The PD alignment procedure have been gone
through again. |
|
|
173
|
Tue Oct 22 17:17:59 2013 |
Koji | General | General | H1OMC cabling | [Chub, Jeff, Koji]
We worked on the wiring and routing
of the cables. |
|
|
172
|
Wed Oct 16 19:16:29 2013 |
Koji | Optics | Characterization | PD alignment |
shim 1.5mm 001/002 |
|
|
171
|
Tue Oct 15 18:50:08 2013 |
Koji | Optics | Characterization | QPD alignment | 1) Deburr the bottom surfaces of the QPD
housings
2) Aligned the QPDs |
|
|
170
|
Mon Oct 14 15:50:55 2013 |
Koji | Optics | Characterization | H1 OMC Power budget | LHO OMC power budget
|
|
|
169
|
Mon Oct 14 13:40:16 2013 |
Koji | Optics | Characterization | H1 OMC Optical testing | Since the middle of September, the optical
tests of H1 OMC were took place.
Here is summary of the progress. |
|
|
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. |
|
|
167
|
Sat Sep 7 17:20:56 2013 |
Koji | General | General | OMC/PD lab optical table wrapping | [Koji Jeff]
In order to prepare for the splinkler
installation on the HEPA enclosure, the table |
|
|
166
|
Wed Sep 4 22:22:54 2013 |
Koji | General | General | H1 OMC wrapped and moved to the bake lab. | [Koji, Jeff]
We moved the H1OMC to the bake lab.
Chub set up the vacuum bake oven |
|
|
165
|
Tue Sep 3 17:03:25 2013 |
Koji | General | General | H1 OMC gluing completed | [Koji Jeff]
H1 OMC |
|
|
164
|
Fri Aug 30 12:25:29 2013 |
Koji | General | General | H1 OMC Invar mount gluing | The Invar Mounting Blocks were glued on
the breadboard.
Serial number #1/2/5/6/7/8 -> |
|
|
163
|
Fri Aug 30 12:24:28 2013 |
Koji | Optics | Characterization | H1OMC Spot positions | Beam heights on the diodes
DCPD1: 14.459mm -> With 1.5mm |
|