| ID |
Date |
Author |
Status |
Type |
Category |
Location |
Title |
Text |
 |
|
245
|
Tue Sep 12 14:28:36 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Removing high order modes | yesterday with Daniele, we tried again
to move the arm horizontally and vertically
from the "zero position" to have |
|
|
244
|
Fri Sep 8 19:45:56 2023 |
Ronic Chiche | Fixed | info | lasers and optics | ThomX igloo | 33MHz oscillator + Alphanov amplifier lock | redoing the PDH error signal scheme with
discrete components is more flexible and
it is easier to check the signal/noise ratio. |
|
|
253
|
Fri Sep 8 19:35:36 2023 |
Ronic Chiche | Fixed | info | detectors and electronics | Optical room | lock oscillateur 33MHz - synthé 500MHz | this afternoon, I installed the frequency
detection scheme in the bunker :
- I changed the large reflected |
|
|
242
|
Fri Sep 8 18:22:21 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Removing high order modes | here is the picture of the L-shape arm
and the inside of the vessel.
this image corresponds to the "zero" |
|
|
241
|
Fri Sep 8 12:43:04 2023 |
Ronic Chiche | Fixed | info | mechanics | lasers and optics | detectors and electronics | ThomX igloo | Removing high order modes | this morning we locked the laser and the
FP-cavity with ~ 40kW => some HOM appeared
"randomly" depending on the power. |
|
|
240
|
Thu Sep 7 19:23:36 2023 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | Fast feedback loop between laser and FP cavity | today, after the several unsuccessful attempt
yesterday to get an improvement in the lock,
we decided to "rebuild" |
|
|
239
|
Thu Sep 7 18:51:43 2023 |
Ronic Chiche | Fixed | issue | lasers and optics | ThomX igloo | Onefive laser modelock and Smaract CEP controller | today, during an attempt in improving the
CEP with the Smaract controller CH2, we lost
the laser modelock. |
|
|
238
|
Wed Sep 6 20:09:56 2023 |
Ronic Chiche | Fixed | info | lasers and optics | ThomX igloo | Smaract controller remplacement | previously, we were using a spare Smaract
MCS controller to drive the Onefive linear
stages (without -LV -low vibration- |
|
|
237
|
Wed Sep 6 19:57:48 2023 |
Ronic Chiche | Fixed | info | lasers and optics | detectors and electronics | ThomX igloo | Fast feedback loop between laser and FP cavity | today, we tried to lock the FP cavity with
the Smaract motors ON (with option -LV).
we know the Smaract controllers produce |
|
|
236
|
Tue Sep 5 18:21:12 2023 |
Ronic Chiche | Fixed | info | lasers and optics | ThomX igloo | FP-cavity FSR shift | today, to match the ring frequency at 500.25MHz
(15th laser harmonic), we did a frequency
shift on the laser using the Smaract motors |
|
|
235
|
Tue Sep 5 18:08:39 2023 |
Ronic Chiche | Fixed | info | lasers and optics | ThomX igloo | Equipments shutdown | on the August 30rd and 31th, a global power
shutdown was forseen for ThomX.
to prevent damage on equipments, |
|
|
234
|
Tue Sep 5 17:59:24 2023 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | ThomX igloo | work with HV voltage on the Laselock | Yesterday, I checked the 2 output HV channels
of the LaseLock : they work properly but
the noise is bigger than the low voltage |
|
|
233
|
Wed Aug 2 13:13:52 2023 |
Ronic Chiche | Fixed | issue | lasers and optics | detectors and electronics | ThomX igloo | work with HV voltage on the Laselock | presently, the voltage on the laser PZT
is 0-10V, but during the several runs we
did, this voltage is too low to compensate |
|
|
232
|
Wed Aug 2 13:07:59 2023 |
Ronic Chiche | Not Fixed | issue | detectors and electronics | ThomX igloo | ThomX ring injection kicker noise => USB communication issue with Alphanov amplifier | several times already, when the electrons
ring injection kicker is running @10Hz, we
observed peaks at the same frequency on reflected |
|
|
252
|
Wed Aug 2 11:38:20 2023 |
Ronic Chiche | Fixed | info | detectors and electronics | Optical room | lock oscillateur 33MHz - synthé 500MHz | Today, I connected the BNC-DB9 female prolongator
cable to the FP-cavity PZT cable (DB9-DB9)
and to the channel B of the Laselock. |
|
|
251
|
Mon Jul 31 19:17:40 2023 |
Ronic Chiche | Fixed | info | detectors and electronics | Optical room | lock oscillateur 33MHz - synthé 500MHz | Today, I installed a DB9-DB9 female-male
cable on the PZT connector of the FP-cavity.
the PZT is connected between pins |
|
|
250
|
Fri Jul 28 13:19:22 2023 |
Ronic Chiche | Fixed | info | detectors and electronics | Optical room | lock oscillateur 33MHz - synthé 500MHz |
régler le problème
1:
Kevin m'a apporté un déphaseur |
|
|
249
|
Thu Jul 27 18:47:57 2023 |
Ronic Chiche | Fixed | info | detectors and electronics | Optical room | lock oscillateur 33MHz - synthé 500MHz | pour préparer le lock cavité-anneau,
j'ai un setup de lock en salle optique
entre le laser OneFive 133MHz et un synthé |
|
|
227
|
Wed Jul 26 14:49:41 2023 |
Ronic Chiche | Fixed | info | lasers and optics | ThomX igloo | 33MHz oscillator + Alphanov amplifier lock | Today, we locked the cavity with input
power @ 30% for the amp => we got 40kW
with only 30% of coupling (and a bad lock |
|
|
226
|
Wed Jun 28 19:07:42 2023 |
Ronic Chiche | Fixed | issue | lasers and optics | ThomX igloo | Incoming laser beam power issue | today, we observed on the photodiode used
in reflexion of the cavity, that its voltage
level stops increasing after 50% of power |
|