| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
411
|
Fri Feb 21 10:13:03 2025 |
Ronic Chiche | Under Process | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | correlations between accelerometer and lock losses @ 20Hz | for this 20Hz oscillation, could it be
a natural resonance of the optical table
placed on its feet ? |
|
|
327
|
Fri Mar 1 18:38:17 2024 |
Ronic Chiche | Fixed | info | software | ThomX igloo | correct parameters for locking the FP-cavity | Today, we restarted the FP-cavity locking,
after 3 weeks without using it.
those 3 weeks have been used to set |
|
|
328
|
Mon Mar 4 09:32:06 2024 |
Ronic Chiche | Fixed | info | software | ThomX igloo | correct parameters for locking the FP-cavity | this morning I solved the problem of the
33MHz frequency beating which should be ~12kHz
between the generator (at the new frequency |
|
|
331
|
Tue Mar 5 11:20:43 2024 |
Ronic Chiche | Fixed | info | software | ThomX igloo | correct parameters for locking the FP-cavity | this morning, I finished the FP-cavity
alignment with the new ring RF frequency.
I get back 50kW @ 33% amplifier ratio. |
|
|
316
|
Thu Jan 25 10:15:28 2024 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | cabling | ThomX igloo | controller M1 & M4 (plan mirrors) with IcePap controllers | previously, we have connected motor M4
with an IcePap controller.
see this post : https://elog.lal.in2p3.fr/FPC/THOMX+commissioning/278 |
|
|
317
|
Thu Jan 25 12:45:41 2024 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | cabling | ThomX igloo | controller M1 & M4 (plan mirrors) with IcePap controllers | this double motors scheme works good.
if motor P4 is used by increasing
value, the FP-cavityPZT signal (pink signal |
|
|
319
|
Fri Jan 26 11:05:27 2024 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | cabling | ThomX igloo | controller M1 & M4 (plan mirrors) with IcePap controllers | at the begining of each session, it will
be mandatory to avoid any backlash for the
motors : |
|
|
283
|
Wed Nov 15 09:36:35 2023 |
Ronic Chiche | Fixed | report | detectors and electronics | ThomX igloo | bunker temperature curve | |
|
|
422
|
Fri May 2 10:05:43 2025 |
Ronic Chiche | Under Process | report | lasers and optics | ThomX igloo | air conditionning in ThomX Bunker | The temperature slitly increase in thomx
Bunker from 23° to 24° during the
last day. |
|
|
423
|
Tue May 6 09:29:43 2025 |
Ronic Chiche | Under Process | report | lasers and optics | ThomX igloo | air conditionning in ThomX Bunker | after the new temperature setting for the
bunker air cooling (winter to summer transition),
the temperature drop from 24° to 20°C |
|
|
424
|
Tue May 6 10:58:18 2025 |
Ronic Chiche | Under Process | report | lasers and optics | ThomX igloo | air conditionning in ThomX Bunker | I finally got 93-94kW for 33% amp ratio.
I had to move the FP-cavity length
to compensate the temperature change in the |
|
|
446
|
Fri Jul 18 09:23:40 2025 |
Ronic Chiche | Under Process | info | lasers and optics | ThomX igloo | Xrays experiment with prostate | Today we do XRays for experiment.
The laser start to 33% at 93 KW
but Pgain = 0.033 |
|
|
22
|
Tue Mar 26 18:32:40 2019 |
Loïc Amoudry | Fixed | report | mechanics | lasers and optics | cabling | Optical room | Wires in laser path | There was some ceramic wires close to the
beem path right before P4. We moved them
away (we can imagine they could move again |
|
|
151
|
Tue Jun 14 10:43:07 2022 |
Ronic Chiche | Fixed | info | vacuum | ThomX igloo | Vessels vacuum at ambiant pressure | Last Friday and this morning, with Bruno,
we close the ring/cavity valves and put some
dry air in the two vessels through a filter |
|
|
53
|
Tue Sep 3 17:51:04 2019 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | vacuum | Optical room | Vessel cleanliness | looking in the vessel of the FP cavity
using a UV lamp shows a lot of dust... more
dust than outside the cavity !!! |
|
|
310
|
Wed Jan 10 15:21:46 2024 |
Ronic Chiche | Under Process | info | lasers and optics | ThomX igloo | Variable focal lens validation | we plan to use Electrically Tunable Lenses
EL-10-30-C NIR to build the ThomX telescope
but they need to be compatible with the powerful |
|
|
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, |
|
|
26
|
Tue Apr 2 18:03:31 2019 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | Transmission of the mirrors | We openned the cavity, removed S2 and measured
trans of P1 and same for S2.
Pin ~= 3.91 mW |
|
|
28
|
Thu Apr 4 09:42:12 2019 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | Transmission of the mirrors | After verification, transmission of P1
correspond to ~150ppm.
The 1337ppm come from a beam leakage. |
|
|
29
|
Fri Apr 5 11:18:47 2019 |
Loïc Amoudry | Fixed | report | lasers and optics | Optical room | Transmission of the mirrors | P1 transmission out of the mount (means
angle of the mirror is not the real angle):
Pin = 3.2 mW |
|