| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
381
|
Wed Nov 20 18:55:37 2024 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | Checking the amplifier power | this afternoon, we put back the 1/4 and
1/2 waveplates and after a long alignment/angle
tuning/CEP optimization process, we hardly |
|
|
415
|
Wed Mar 5 13:17:26 2025 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | Electrons-Photons phase stability measurement | we installed a measurement at the IP with
the BPM for ion cleaning for electrons and
we used a fast photodiode at the output of |
|
|
416
|
Wed Mar 5 15:08:38 2025 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | Electrons-Photons phase stability measurement | the phase between the 500Mhz ring RF oscillator
and the electrons is measured on a BPM and
is very stable after 2-3ms (<< 6ps, |
|
|
437
|
Wed Jul 9 16:27:18 2025 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | optical attenuator added on the diffuser + new PID parameters | Today we did several long runs (~1h each)
at ~23kW, 46kW, 66kW with different PID parameters
which seems better. |
|
|
438
|
Wed Jul 9 17:20:01 2025 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | New recipies with additionnal attenuation before the diffuser | With optical attenuation
only
For ~ 92kW power in the |
|
|
439
|
Wed Jul 9 18:11:59 2025 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | long run to test the appearance of high frequency noise | Today with Daniele, we did 6 long runs
at different power (23kW, 46kW, 66kW, 73kW,
92kW, 92kW) |
|
|
440
|
Thu Jul 10 15:44:43 2025 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | long run to test the appearance of high frequency noise | today, long run directly at full power
(33% amplifier ratio) => 98kW in the FPC
at the very begining of the run. |
|
|
442
|
Thu Jul 10 18:33:48 2025 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | New recipies with additionnal attenuation before the diffuser and new x3 amplifier on laser PZT | With optical attenuation + x3 amplifier
on laser PZT channel + feedback tuning
Temporary recipie |
|
|
443
|
Fri Jul 11 16:15:12 2025 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | Tuning of the slow feeback loop analog BW + fast feedback loop gain + PID | Today with Daniele, we tuned the potentiometer
after the Laselock which drives the analog
BW of the PID on the laser PZT, |
|
|
448
|
Thu Aug 7 11:14:47 2025 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | Alignment correction during the summer break | I restarted the FPC system this morning.
after some classic alignement procedure
(some LEFT steps on the cavity injection |
|
|
451
|
Tue Sep 16 12:32:52 2025 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | polarization measurement of the FP cavity beam | today, with Daniele, we did a simple polarization
measurement in transmission of the FP cavity
beam. |
|
|
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 |
|
|
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 |
|
|
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 ! |
|
|
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. :-( |
|
|
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 |
|
|
1
|
Tue Sep 25 19:17:43 2018 |
Loïc Amoudry | Fixed | info | lasers and optics | Optical room | Onefive Origami 33MHz specs | Power during ~20h, power after turn on,
spectrum image and excel datas, polarisation
and pulse length. |
6x |
|
2
|
Thu Sep 27 15:43:48 2018 |
Ronic Chiche | Fixed | info | lasers and optics | Optical room | Onefive Origami 33MHz specs - Polarisation | one rotate a lambda/2 before a PBS and
meausure the refected power:
Pmax=35.6 mW |
|