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Entry   Damage on mirror surface , posted by Manar Amer at Optical room about lasers and optics image001.jpgimage002.jpgimage004.jpg
    Reply   Damage on mirror surface , posted by Manar Amer at Optical room about lasers and optics 
       Reply   Damage on mirror surface , posted by Manar Amer at Optical room about lasers and optics 
          Reply   Damage on mirror surface , posted by Manar Amer at Optical room about lasers and optics M1_mirror_on_Microscope_stand0.jpgM1X_front_min_zoom.jpgM1X_front_max_zoom.jpgM1X_front_damaged_spot_max_zoom.jpg
             Reply   Damage on mirror surface , posted by Manar Amer at Optical room about lasers and optics 
                Reply   M1 ThomX used while shifted from damaged spot , posted by Manar Amer at Optical room about lasers and optics Screenshot_2022-09-19_2_172943.pngScreenshot_2022-09-19_1_171834.png00mode_LOCK.jpg00mode_LOCK_saturaed.jpg
                   Reply   M1 ThomX used while shifted from damaged spot , posted by Manar Amer at Optical room about lasers and optics 
                      Reply   M1 ThomX used while shifted from damaged spot , posted by Manar Amer at Optical room about lasers and optics 00mode_damaged_0_26ms.jpg00mode_damaged_saturted_50ms.jpgreflection_noLock.jpgreflection_Lock_0_15ms.jpg
                         Reply   M1 Gamma Factory, posted by Manar Amer at Optical room about lasers and optics 00mode_ThomX_Mirror_degeneracySpot_1point04ms.jpg00mode_ThomX_Mirror_degeneracySpot_saturateat50.jpgCoupling_mirror_.jpeg
                            Reply   M2 ThomX spherical Cleaning , posted by Manar Amer at Optical room about lasers and optics 6x
Message ID: 162     Entry time: Tue Sep 13 19:26:27 2022     In reply to: 161     Reply to this: 166
 Author: Manar Amer 
 Status: Fixed 
 Type: report 
 Category: lasers and optics 
 Location: Optical room 
 Title: Damage on mirror surface  

After discussing, we have decided against shifting the mirror to avoid the time lost.

We changed the injection mirror to a different mirror from Mighty Laser set, Transmission of mirror 80 ppm. (no visible damage at the center of the mirror, only a small scratch on the back)

mirror cleaned using pure ethanol and pure water with spin coater, also the spherical mirror was cleaned again.

 

Manar Amer wrote:

Tomorrow will try to shift the injection mirror to avoid hitting the damaged spot.

 

Manar Amer wrote:

Following the storage of ~ 50 kW inside the cavity and a sudden drop in transmitted power from the cavity 

damage to the mirror surface was suspected.

We broke vacuum and took images of the surface of the 2 mirrors in the cavity, the spherical and the planar mirror 

image 1 , spherical reflective surface (no visible damage with the UV light, and no visible damage under the microscope)

image 2 , planar coupler mirror reflective surface (no visible damage under UV light, but under the microscope there is a damaged spot close to the center)

image 4 is the planar surface reflective surface at zoom 8 on the microscope.

 

 

 

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