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Entry   Dust Cleaning of SBox, posted by Manar Amer at Optical room about utilities Log_Top_window.jpgLog_Reflection_window.jpgLog_Injection_Side_window.jpgLog_Injection_side_window2.jpg
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          Reply   Dust Cleaning of SBox, posted by Manar Amer at Optical room about mechanics | lasers and optics | utilities 20220331_Dust_Meter_Outside_cavity_Av10min.jpg20220331_Dust_Meter_Inside_cavity_Av10min.jpg
Message ID: 72     Entry time: Thu Mar 31 13:29:01 2022     In reply to: 71
 Author: Manar Amer 
 Status: Fixed 
 Type: report 
 Category: mechanics | lasers and optics | utilities 
 Location: Optical room 
 Title: Dust Cleaning of SBox 

After an overnight where the cavity box was left open, a measurement of the Dust meter was taken:

Outside on the optical table on direct air flux (1701 p/m3 Av 10 min) and

Inside the cavity box (998 p/m3 Av 10 min)

The dust inside the cavity has decreased by ~ 30 % for 0.3 u particles.

Note: the cavity box is still open.

Manar Amer wrote:

The inside of the cavity was cleaned today. It was very dirty and had big dust particles and fibers inside.

Cleaning was done for everything; wall, floor, fixed mounts, wires (still have some dust difficult to remove), edges.

The dust meter average was measured outside the cavity (2471 p/m3 av 6 min)  and inside after cleaning (1424 p/m3 av 10 min).

The cavity was left open under the clean air flow, will observe it under UV, clean and measure Dust tomorrow.

Images attached are after cleaning.

Objects inside the cavity at the moment :

  • 4 main mirror mounts
  • 4 mirror fixers on mounts and 3 screws each (total 12)
  • 2 reflecting mirror mounts
  • 2 dielectric mirrors (mounted and to be cleaned)
  • two mounts for D-shaped mirrors.
  • 2 D-shaped mirrors (unmounted, and they will need cleaning)
  • 2 metal irises (pinholes)

 

Manar Amer wrote:

The cleaning was done twice with half an hour interval between the two times
reading on the dust meter was taken after each time, and it was zero averaged over a 10-min

Manar Amer wrote:

An Initial cleaning of the KBoX outside was done, All the optics and mechanics placed that were on the table were removed.

Only the old Mitylaser amplifier remains on the table.

Since we will be using the ThomX Celia amplifier, we will remove it and place it in a secure location (to be decided).

Tomorrow a cleaning of the inside of the cavity box is to be done.

 

 

 

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Attachment 2: 20220331_Dust_Meter_Inside_cavity_Av10min.jpg  65 kB  | Hide | Hide all
20220331_Dust_Meter_Inside_cavity_Av10min.jpg
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