Who:Kimura, Tomaru, Yasui and Yano
Task:
We fixed very large vacuum leak place at the EXV chamber.
The place was on D-sub type hermetic sealed connector .
Pleas see attached photos.
The leak level was 3.0 x 10^-7 Pam^3/s.
We are assuming the reason of leak was crack in the ceramic or pin hole of sealing between pin and the ceramic.
We will discuss how to repair it.
