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ID Date Author Status Type Category Location Titledown Text Attachments
  113   Tue Jul 12 14:41:55 2022 Manar AmerFixedreportlasers and optics | detectors and electronicsOptical roomFSR change & Finesse Measurements a Finesse of 30k with the present mirrors
:

T1=120 ppm ;A1=(2.6+1) ppm;		   
  32   Tue Dec 10 09:36:56 2019 Ronic ChicheFixedinfolasers and opticsOptical roomFSR and Finesse measurementYesterday the cavity has been aligned and
locked with the CW Koheras laser.

the FSR has been measured by modulation		  untitled.png 
  181   Tue Jan 16 18:42:42 2024 Xinyi LuFixedinfolasers and opticsOptical roomFSR and Finesse measurement- Today, Ronic and I measured the finesse
and FSR after optimizing the locking. FSR
was adjusted to 160.27 MHz to match the pulsed		  Screenshot_2024-01-16_2_145546.pngScreenshot_2024-01-16_4_150258.png 
  67   Wed Mar 23 18:11:22 2022 Manar AmerFixedreportutilitiesOptical roomDust Cleaning of SBoxAn Initial cleaning of the KBoX outside
was done, All the optics and mechanics placed
that were on the table were removed.		  Log_Top_window.jpgLog_Reflection_window.jpgLog_Injection_Side_window.jpgLog_Injection_side_window2.jpg 
  68   Wed Mar 23 18:17:45 2022 Manar AmerFixedreportutilitiesOptical roomDust Cleaning of SBoxThe cleaning was done twice with half an
hour interval between the two times
reading on the dust meter was taken		   
  71   Wed Mar 30 18:53:01 2022 Manar AmerFixedreportmechanics | lasers and optics | utilitiesOptical roomDust Cleaning of SBoxThe inside of the cavity was cleaned today.
It was very dirty and had big dust particles
and fibers inside.		  6x 
  72   Thu Mar 31 13:29:01 2022 Manar AmerFixedreportmechanics | lasers and optics | utilitiesOptical roomDust Cleaning of SBoxAfter an overnight where the cavity box
was left open, a measurement of the Dust
meter was taken:		  20220331_Dust_Meter_Outside_cavity_Av10min.jpg20220331_Dust_Meter_Inside_cavity_Av10min.jpg 
  103   Wed Jul 6 18:37:02 2022 Manar AmerFixedreportlasers and opticsOptical roomDivergence of the CW beam after collimator Closing the series of the telescope for
the beam @ 133.33 MHz

 		   
  212   Mon Apr 8 08:34:54 2024 Xinyi LuFixedinfolasers and opticsOptical roomDifferent cavity modes & Pulse width- Last week, we obtained three curves of
the variation of different cavity modes with
power (Fig. 1). By comparing the gain for		  cavitymode_vs_power_f.pngdifferent_cavity_mode_data.xlsx 
  213   Tue Apr 9 08:57:22 2024 Xinyi LuFixedinfolasers and opticsOptical roomDifferent cavity modes & Pulse widthAdditional information:

The pulse duration has been performed
in RF on a UPD-70-IR2-P photodiode from Alphalas		  t_cvbg.pngt_amp.png 
  25   Thu Jan 24 17:44:21 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomDeposit on S-box mirrors after return from LMACleaning on dirty surface shows something
is deposited on the surface. Cleaning displaces
and removes part of the deposit.		  28_M2ReflectiveBeforeCleaning_compressed.jpg29_M2ReflectiveAfter1stCleanPaper_compressed.jpg 
  237   Fri Jun 13 20:10:00 2025 Alice RenauxFixedreportlasers and opticsOptical roomDamaged mirrors testToday with Dorian we tested three mirrors
with which we previously haven't been
able to obtain any resonance or optical beating		   
  160   Mon Sep 12 18:49:42 2022 Manar AmerFixedissuelasers and opticsOptical roomDamage on mirror surface Following the storage of ~ 50 kW inside
the cavity and a sudden drop in transmitted
power from the cavity 		  image001.jpgimage002.jpgimage004.jpg 
  161   Mon Sep 12 18:50:57 2022 Manar AmerFixedissuelasers and opticsOptical roomDamage on mirror surface Tomorrow will try to shift the injection
mirror to avoid hitting the damaged spot.

 		   
  162   Tue Sep 13 19:26:27 2022 Manar AmerFixedreportlasers and opticsOptical roomDamage on mirror surface After discussing, we have decided against
shifting the mirror to avoid the time lost.

We changed the injection mirror		   
  166   Fri Sep 16 15:56:45 2022 Manar AmerFixedreportlasers and opticsOptical roomDamage on mirror surface a better image of the damaged spot, image
taken with the arrow for the reflective surface
facing the other direction (image shows position)		  M1_mirror_on_Microscope_stand0.jpgM1X_front_min_zoom.jpgM1X_front_max_zoom.jpgM1X_front_damaged_spot_max_zoom.jpg 
  167   Fri Sep 16 17:47:56 2022 Manar AmerFixedreportlasers and opticsOptical roomDamage on mirror surface ThomX injection mirror has been cleaned
and placed again inside the optical cavity.

This time to avoid the damaged		   
  156   Fri Sep 9 18:35:07 2022 Ronic ChicheFixedinfomechanics | lasers and optics | detectors and electronicsOptical roomD-shape mirrors positionning statusThis afternoon we opened the cavity and
put the D-shape mirrors at their correct
place, close to the beam.		   
  157   Fri Sep 9 19:03:58 2022 Ronic ChicheFixedinfomechanics | lasers and optics | detectors and electronicsOptical roomD-shape mirrors positionning statusThe cavity box is vacuum pumped at 6*10^-2
mbar.

  
  223   Wed Jun 19 10:38:00 2024 Ronic ChicheFixedinfomechanics | lasers and optics | detectors and electronicsOptical roomD-shape mirrors positionning statussummary:

- the motors used to move the D-shape
are the Newport Picomotors 8303-V		   
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