Maintenance for Helios
Date:
Tuesday, February 22, 2005
Synopsis:
Leak Rate While Cooling Down
Equipment/Beam Line:
Description:
Leak check after vacuum jacket was polished. Bg: 1e-9 (no zeroing) no leak at R.T on top vac jacket started cooling at 6:30am nitrogen to magnet stopped P =1E-5 torr; BG= 1.6E-5