1

Stony Brook Update:Ready to Start…

T.K. Hemmick for the Tent Crew

2

Glovebox Cleaning Complete• After significant cleaning:

– Alcohol wipes with more abrasive wipes.

– Alcohol wipes with dust-free wipes.

– Blow out with compressed gas.

– Flush with high capacity HEPA unit.

– Blow out with de-ionized gas.– Flush with high capacity

HEPA unit.• The dust meter read better

than class 10 while resting on the FLOOR of the glovebox.

• Congratulations to Christina, Matt, and Thomas for these efforts.

Class of a clean room is definedas the number of dust particles

above 0.5 m in one cubic foot of air.

Here the unit measured zero suchparticles in 0.1 cubic feet of air.

Typically the number of 0.3 m particles is ~6X the number of 0.5 m particles.

3

Shot Completed and Ready.

• The shot was made under all optimal conditions (pumps working better, particularly the rebuild cryo & scroll pumps).

• QE looks fine (but PMT was a little unstable during measurement, might want a tweak of the alignment).

4

Cathodes still in Evaporator.

• Parts were received for the global shades but are not yet installed.

• Thus, the glovebox is still open (with large HEPA unit continually flushing it).

• It will require about a day after the installation of the global shade supports to get the glove box fully under dry nitrogen so that the installation can begin.