====== 05.10.2016 ======
  * Vacuum chamber was cleaned with dishwashing detergent 
  * Discussion about the breadboard (M3 screw size, small passage for the light, aluminium) and spacer (3cm, plastic) for incouple and outcouple light from the cavity 
  * Mounting (holes for countersunk head screws) was repaired
  * Countersunk head screws installed in mounting. Probably, screws made of V2A steel:
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**ToDo in Hannover:**
  * Order and design breadboard (2x)
  * Order and design eccentrical spacer (1mm from centre)

**Next time at PTB:**
  * Clean the vacuum chamber with acetone
  * Drill holes in cavity breadboard
  * Test the M6 holes from vacuumchamber if all threads are deep enough.