| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
325
|
Fri Feb 9 15:49:39 2024 |
Ronic Chiche | Under Process | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | 20Hz oscillation in the locking between Laser and FP-cavity | what does this 10ps phase jitter mean in
term of cavity length variations ?
L = L0 + dL sin(2pi fm t) = L0 |
|
|
326
|
Fri Feb 9 18:00:05 2024 |
Ronic Chiche | Under Process | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | 20Hz oscillation in the locking between Laser and FP-cavity | measure to be done next week to check the
20Hz noise on the laser amplifier signal:
- install a DET10 in reflection |
|
|
343
|
Thu Jun 6 09:17:02 2024 |
Ronic Chiche | Fixed | issue | lasers and optics | ThomX igloo | Alphanov amplifier issue | FYI : to access special menus on the Alphanov
software,
login : "Administrator" |
|
|
345
|
Wed Jun 19 09:14:14 2024 |
Ronic Chiche | Fixed | issue | lasers and optics | ThomX igloo | Alphanov amplifier issue | the present situation is :
Guillaume asked me to disconnect
the "Laser head" cable from the |
|
|
346
|
Mon Jul 22 09:54:24 2024 |
Ronic Chiche | Fixed | issue | lasers and optics | ThomX igloo | Alphanov amplifier issue | Guillaume and Julien Bour from Alphanov
will come on wednesday 24/07 to have a first
look and check the amplifier. |
|
|
347
|
Tue Jul 23 09:37:24 2024 |
Ronic Chiche | Fixed | issue | lasers and optics | ThomX igloo | Alphanov amplifier issue | picture of the connectors used to carry
signals between the amplifier pump module
and the rack under the table. |
|
|
355
|
Thu Sep 5 09:51:22 2024 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | ThomX igloo | fixing CVBG issue | the CVBG of the compressor module seems
to have an issue.
here is the plan of the work : |
|
|
356
|
Thu Sep 5 09:53:10 2024 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | ThomX igloo | fixing CVBG issue | 1) this morning, I aligned to CFP to get
back 82kW in the cavity for 33% of amplifier
ratio. |
12x |
|
357
|
Fri Sep 6 11:56:53 2024 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | ThomX igloo | fixing CVBG issue | this morning with Daniele, we realigned
the amplifier beam axis on the iris position.
it was pretty fast an easy => we |
|
|
361
|
Fri Sep 6 17:27:20 2024 |
Ronic Chiche | Under Process | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | 20Hz oscillation in the locking between Laser and FP-cavity | could it be possible this 20Hz oscillations
comes from anouncements in the bunker, puting
the housing+table in vibration ? |
|
|
370
|
Mon Oct 14 10:21:17 2024 |
Ronic Chiche | Fixed | issue | lasers and optics | ThomX igloo | Onefive 33MHz modelock loss | On Friday 11th of October, due to the Yvette
flooding, all the AC power of ThomX have
been shut down. |
|
|
371
|
Tue Oct 15 09:33:15 2024 |
Ronic Chiche | Fixed | issue | lasers and optics | ThomX igloo | Onefive 33MHz modelock loss | This morning, I verified the reason why
the seeder frequency was not displayed on
the amplifier software screen: |
|
|
372
|
Mon Oct 21 09:20:47 2024 |
Ronic Chiche | Fixed | issue | lasers and optics | ThomX igloo | Onefive 33MHz modelock loss | After the new Yvette flooding of the last
week and the consecutive AC-shut down, I
restarted this morning the laser with the |
|
|
373
|
Tue Oct 22 18:52:40 2024 |
Ronic Chiche | Fixed | issue | lasers and optics | ThomX igloo | Onefive 33MHz modelock loss | For the modulation/demodulation generator
for the PDH signal,
after a power shutdown, on can : |
|
|
412
|
Fri Feb 21 19:40:50 2025 |
Ronic Chiche | Fixed | issue | software | ThomX igloo | strange drift (new effect !?!) | today, we had a strange effect :
both the laser and the FP cavity were
locked on the RF frequency (500.10045 MHz), |
|
|
427
|
Wed Jun 11 18:59:34 2025 |
Ronic Chiche | Under Process | issue | mechanics | lasers and optics | vacuum | detectors and electronics | ThomX igloo | Possible causes for the noise in the FP-cavity system | list of possible causes of the high frequency
noise which makes the system loosing the
lock => to be checked. |
|
|
429
|
Wed Jun 25 09:57:56 2025 |
Ronic Chiche | Under Process | issue | mechanics | lasers and optics | vacuum | detectors and electronics | ThomX igloo | Possible causes for the noise in the FP-cavity system | 4.3 - Vibrations of the mirror mounts due
to temperature related to cavity power (the
electrons machine is OFF) |
|
|
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. |
|
|
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 |
|
|
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 |
|