| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
473
|
Thu Jun 11 17:11:02 2026 |
Ronic Chiche | Under Process | info | mechanics | lasers and optics | vacuum | ThomX igloo | removing of the M1 mirror | This afternoon, we installed a new M1 mirror,
the only one for which the box was not already
opened. |
|
|
472
|
Thu Jun 11 11:16:55 2026 |
Ronic Chiche | Under Process | info | mechanics | lasers and optics | vacuum | ThomX igloo | removing of the M1 mirror | this morning, with Daniele, we took some
images of the M1 mirror HR surface :
1- large image span of the mirror |
6x |
|
471
|
Wed Jun 10 16:16:33 2026 |
Ronic Chiche | Under Process | info | mechanics | lasers and optics | vacuum | ThomX igloo | removing of the M1 mirror | after trying to increase the power and
after moving S3 to try to change the size
of the beam on the mirrors, the FPC power |
|
|
470
|
Thu May 28 10:31:23 2026 |
Ronic Chiche | Under Process | report | lasers and optics | ThomX igloo | Increasing the FP-cavity power | Last friday, with Daniele, we did some
realignement on the 2nd CVBG of the compressor
: the beam shape seems better, now. |
|
|
469
|
Mon May 18 11:33:46 2026 |
Ronic Chiche | Under Process | report | lasers and optics | ThomX igloo | Increasing the FP-cavity power | this morning with Daniele, we set the amplifier
ratio to 33% => 97kW
then, we set the amplifier ratio |
|
|
468
|
Wed Apr 29 15:31:06 2026 |
Ronic Chiche | Under Process | report | lasers and optics | ThomX igloo | Increasing the FP-cavity power | I installed a stronger optical filter on
the reflection photodiode and loaded it on
1kOhms. |
|
|
467
|
Wed Apr 29 09:38:20 2026 |
Ronic Chiche | Under Process | report | lasers and optics | ThomX igloo | Increasing the FP-cavity power | new power increase after alignment of the
waveplates and iris.
amplifier ratio (%) => FPC cavity |
|
|
466
|
Mon Apr 27 16:55:15 2026 |
Ronic Chiche | Under Process | report | lasers and optics | ThomX igloo | Increasing the FP-cavity power | today with Alice and Daniele,
we checked the distance of the
optical setup : |
|
|
465
|
Wed Apr 22 09:52:40 2026 |
Ronic Chiche | Under Process | report | lasers and optics | ThomX igloo | Increasing the FP-cavity power | Last Friday, we tried to increase the FP-cavity
power by just increasing the amplifier ratio
from 35% to 70%. |
8x |
|
464
|
Mon Feb 2 15:29:45 2026 |
Ronic Chiche | Fixed | info | lasers and optics | ThomX igloo | Laser Amplifier used at 70% | today, I installed a laser dump just before
the telescope to avoid any high power (50W
instead of 17W usually) issue in the injection |
|
|
463
|
Mon Dec 8 11:17:17 2025 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | ThomX igloo | High frequency noise | This morning, I installed a high-voltage
probe (1:1000) on the AC-line to see if one
could detect a correlation between lock losses |
|
|
462
|
Wed Dec 3 16:23:40 2025 |
Ronic Chiche | Fixed | report | lasers and optics | detectors and electronics | ThomX igloo | Noise issue | yesterday, in the same conditions, we had
so many locking issues... exactly
in the same way than before. :-( |
|
|
461
|
Mon Dec 1 18:03:29 2025 |
Ronic Chiche | Fixed | report | lasers and optics | detectors and electronics | ThomX igloo | Noise issue | since several days, we see that the locking
is more and more unstable and the lock duration
was sometime less than 20-30 seconds ! |
|
|
460
|
Tue Oct 28 17:31:47 2025 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | ThomX igloo | High frequency noise | we did some tests with Marie to make some
vibrations on the door.
below, I exhibit some pictures of |
|
|
459
|
Tue Oct 28 10:07:48 2025 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | ThomX igloo | High frequency noise | After this observation, we did a test with
Daniele to try to correlate the road traffic
in front of the Igloo with the lock losses |
|
|
458
|
Wed Oct 1 10:14:12 2025 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | ThomX igloo | High frequency noise | At the end of the day, we found out what
was the origin of this noise : some road
renovation work with jackhammer and road |
|
|
457
|
Tue Sep 30 15:17:30 2025 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | ThomX igloo | High frequency noise | Today, the lock of the FPC was particularly
bad (maybe the worst ever seen), with a lot
of high frequency noise. |
|
|
456
|
Mon Sep 29 10:22:32 2025 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | vacuum | detectors and electronics | cabling | software | utilities | ThomX igloo | Power shut down on September 23th | This morning I did a phase alignment on
the PDH signal generator (Rigol DG4102)
this procedure ensure that both phases |
|
|
455
|
Fri Sep 26 11:13:35 2025 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | vacuum | detectors and electronics | cabling | software | utilities | ThomX igloo | Power shut down on September 23th | the 33MHz/500MHz RF frequencies from the
Ring seems different from the previous state
(maybe working at an energy of 50MeV instead |
|
|
454
|
Fri Sep 26 11:08:21 2025 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | vacuum | detectors and electronics | cabling | software | utilities | ThomX igloo | Power shut down on September 23th | this morning, I restarted all the equipments
of the FPC.
everything was fine after being |
|