| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
283
|
Wed Nov 15 09:36:35 2023 |
Ronic Chiche | Fixed | report | detectors and electronics | ThomX igloo | bunker temperature curve | |
|
|
282
|
Tue Nov 14 11:33:45 2023 |
Ronic Chiche | Fixed | report | mechanics | lasers and optics | ThomX igloo | M4 motor using icepap controller and jive/Atkpanel IHM | one problem is the FP-cavity/laser lock
loss when one moves a FP-cavity motor.
with acceleration = 0.01 units/s² |
|
|
281
|
Tue Nov 14 10:51:57 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Ring frequency / Laser "day by day" locking | temperature stable around 21.7°C
today, the equivalent Smaract position
corresponding to the 500.25MHz ring frequency |
|
|
280
|
Tue Nov 14 10:35:16 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Laser / FP-cavity "day by day" locking | temperature since we moved to temperature
probe (jump at the beginning of the plot)
below the ring on a metallic base. |
|
|
279
|
Fri Nov 10 12:37:42 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Laser / FP-cavity "day by day" locking | as the temperature is back to a normal
value ~ 20.8°C, the injected power to
the amplifier (PD_IN in the Alphanov software) |
|
|
278
|
Fri Nov 10 09:51:22 2023 |
Ronic Chiche | Fixed | report | mechanics | lasers and optics | ThomX igloo | M4 motor using icepap controller and jive/Atkpanel IHM | Kevin moved the M4 mirror controller from
the ISP controller to some ICEPAP controller.
the IHM to access this ICEPAP controller |
|
|
277
|
Fri Nov 10 09:43:26 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Ring frequency / Laser "day by day" locking | temperature stable around 20.8°C
today, the equivalent Smaract position
corresponding to the 500.25MHz ring frequency |
|
|
276
|
Thu Nov 9 17:02:26 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Laser / FP-cavity "day by day" locking | today, we locked the FP cavity at ~50kW
with 30% laser amplifier ratio (16W) during
almost all the day (from 10am to 4pm) |
|
|
275
|
Thu Nov 9 16:40:16 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Ring frequency / Laser "day by day" locking | today, the equivalent Smaract position
corresponding to the 500.25MHz ring frequency
is +156µm on MCS-1/ch0 (closed loop |
|
|
274
|
Wed Nov 8 18:52:44 2023 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | some changes in the feedback scheme | from several weeks, the maximum power stored
in the FP-cavity was ~ 5kW.
today with Daniele, we finished |
|
|
273
|
Wed Nov 8 17:51:30 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | ThomX igloo | !!! strange amplifier beam pointing fluctuations !!! | we confirmed the effect of the bunker temperature
on the laser amplifier "beam pointing"
fluctuations. |
|
|
272
|
Tue Nov 7 14:09:25 2023 |
Ronic Chiche | Fixed | info | lasers and optics | ThomX igloo | Strecher and fiber injection alignment | Today, the power measured at the input
of the amplifier (PD_IN on the LAL amplifier
software) is 2.5mW instead of >3mW generally |
|
|
271
|
Mon Oct 9 13:11:23 2023 |
Daniele Nutarelli | Fixed | info | lasers and optics | ThomX igloo | Tests of pointing stability of the laser CFP | Last monday with Victor we have cheked
the stability of de pointing of the laser
FP. |
|
|
270
|
Fri Sep 22 11:30:28 2023 |
Daniele Nutarelli | Fixed | report | lasers and optics | Optical room | Laser FP operation | This morning FP Laser was operating well
locked at 30 KWatts in stable vay.
There are some fluctuations due |
|
|
269
|
Thu Sep 21 18:56:56 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | ThomX igloo | !!! strange amplifier beam pointing fluctuations !!! | this morning, I locked the cavity to ~25kW
without any problem.
but this afternoon, the reflected |
|
|
268
|
Wed Sep 20 19:17:44 2023 |
Ronic Chiche | Fixed | info | detectors and electronics | Optical room | lock oscillateur 33MHz - synthé 500MHz | after a sudden FP-cavity Finesse increase,
we had to install the Fast Feedback Loop
in order to continue to lock the cavity. |
|
|
267
|
Wed Sep 20 19:12:16 2023 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | Fast feedback loop between laser and FP cavity | I copy the post about Fast Feedback loop
: https://elog.lal.in2p3.fr/FPC/THOMX+commissioning/265
This morning, |
|
|
266
|
Wed Sep 20 19:10:16 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | !!! strange FP cavity behavior => impossible to lock !!! | this afternoon, in adjusting the CEP and
improving the parameters of the lock, I was
able to get ~ 47kW stable inside the cavity, |
|
|
265
|
Wed Sep 20 14:16:09 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | !!! strange FP cavity behavior => impossible to lock !!! | This morning,
- I installed the fast feedback
loop. |
|
|
264
|
Mon Sep 18 17:12:07 2023 |
Ronic Chiche | Fixed | issue | mechanics | lasers and optics | detectors and electronics | ThomX igloo | !!! strange FP cavity behavior => impossible to lock !!! | it could be also an optical unstability,
as when the intra-cavity power increases,
the radius of curvatures of the mirrors increases |
|