| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
285
|
Fri Nov 17 11:44:35 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Laser / FP-cavity "day by day" locking | temperature @ 21.9°C
48.5kW inside CFP for 30% amplifier
ratio |
|
|
287
|
Thu Nov 23 12:25:07 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Temperature control of the FP-cavity length | as the CFP motors displacements induce
a cavity unlock, we try to change the cavity
length by changing the temperature of elment |
|
|
288
|
Thu Nov 23 12:26:26 2023 |
Ronic Chiche | Fixed | issue | lasers and optics | ThomX igloo | Temperature control of the Laser length with the inside Peltier |
bunker temperature @ 22.5°C
today, Sebastien Pitrel improved |
|
|
289
|
Fri Nov 24 12:56:39 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | ThomX igloo | Laser cavity temperature/pressure sensitivity | laser cavity :
when one decreases the laser motor
position, the laser repetition rate |
|
|
290
|
Fri Nov 24 18:16:37 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | ThomX igloo | Laser cavity temperature/pressure sensitivity | Now, I placed a temperature probe stuck on
the laser housing itself.
fig. 1 |
|
|
291
|
Fri Nov 24 18:47:25 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | ThomX igloo | Laser cavity temperature/pressure sensitivity | the last thing we did with Daniele, is
to start/stop the airflow on top of the housing
(closed) to see a possible pressure effect |
|
|
292
|
Tue Nov 28 10:24:47 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | ThomX igloo | Laser cavity temperature/pressure sensitivity | today, I swapped the 500MHz RF reference
oscillator for a Siglent 500MHz DDS oscillator.
see the attached plot : the |
|
|
293
|
Tue Nov 28 11:32:17 2023 |
Ronic Chiche | Fixed | info | mechanics | detectors and electronics | ThomX igloo | Smaract motors parameters and controller | current Smaract motors parameters :
- Closed loop Max frequency : 5000
- Signal Amplitude threshold : 2047 |
|
|
294
|
Tue Nov 28 18:38:16 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Temperature control of the FP-cavity length | several days ago, we installed a heating
cable around the output flange (close to
the X-hutch) of the FP-cavity vessel. |
|
|
295
|
Tue Nov 28 19:01:19 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Long term lock of Laser-FP cavity-RF reference | today for the first time, we were able
to make a long term lock of all the elements
(Laser on FP cavity and FP-cavity on RF reference) |
|
|
296
|
Wed Nov 29 09:35:10 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | ThomX igloo | Laser cavity temperature/pressure sensitivity | long-term correlation, over 5-6 days, between
the temperature measured in the bunker, outside
of the housing (blue curve) and the temperature |
|
|
297
|
Wed Nov 29 12:20:18 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Temperature control of the FP-cavity length | today, I removed one of the DC voltage
supply (as with 30V, we are already able
to 30°C on the heating cable). |
|
|
298
|
Wed Nov 29 12:33:33 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Long term lock of Laser-FP cavity-RF reference | today, I did a 20 minutes "double
lock" run w/o any single lock loss.
the attached file shows the recorded |
|
|
299
|
Wed Nov 29 16:39:16 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Long term lock of Laser-FP cavity-RF reference | this afternoon, we did a new long-term
"double lock" run w/o any single
lock loss during 1/2h. |
|
|
300
|
Thu Nov 30 12:33:08 2023 |
Ronic Chiche | Fixed | info | lasers and optics | ThomX igloo | FP-cavity inside power sensitivity | this morning I monitored the frequency
shift between the FP-cavity frequency (the
laser is locked on it) and the RF reference |
|
|
301
|
Thu Nov 30 15:53:10 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Temperature control of the FP-cavity length | this afternoon, I started the heating cable after
the warm-up of the FP-cavity :
14h20 : start to fill 50kW |
|
|
302
|
Mon Dec 4 10:45:50 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Temperature control of the FP-cavity length | last friday, I locked the cavity and then,
switched ON the heating cable after waiting
the cavity reaches a steady state in frequency |
|
|
303
|
Thu Dec 7 09:09:27 2023 |
Ronic Chiche | Fixed | info | lasers and optics | ThomX igloo | New mirrors batch informations | the 2 files describe the specfications
for the16 mirrors ordered (4 for ThomX
+ spare, 4 for SBOX + spare) and the measurements |
|
|
304
|
Thu Dec 7 14:59:02 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Temperature control of the FP-cavity length | on last tuesday, I did a long-term measurement
of the frequency drift when the heating cable
is powered ON at 20V (2x 10V) @ t=0mn. |
|
|
305
|
Fri Dec 8 12:21:25 2023 |
Ronic Chiche | Fixed | info | lasers and optics | ThomX igloo | Strecher and fiber injection alignment | today, the Alphanov amplifier stopped because
of the too low injected power : ~2.5mW (measured
by the Alphanov software) |
|