Stony Brook Update T K Hemmick for the

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Stony Brook Update T. K. Hemmick for the Stony Brook Crew 1

If cryos are cold, Why is it smoking? • Cryo compressor on loan – ONLY unit in the United States. – We are 1 st “loaner” customer for RICOR cryos. • Cryo is cold and working. • 1 st four Production GEMs are in evaporator! 2

For every pump that is recovered… Dead Alive • Power failure (Friday night) killed Scroll pump. • Fortunately, our multiple troubles with scrolls left us with a spare! • Installed Saturday morning (hope for the best) 3

Need to make QE system faster. • • New dual-measure p. Ammeter. New Lab. VIEW-based QE DAQ. Location via “string pot” Dry run of system using “current box” as source expected today. 4

More efficient data collection from GB • Maestro (PC-based MCA software). – Automated Gain Saturation Curves: • One spectrum every 5 minutes. • Root macros to plot gain curve. – Automated Gain Map: • Prompts user VOCALLY to move cable to next signal. • New patch panel eliminates 50 -ohm terminators. • Complete map (56 pads) in one hour! 5

Maestro • File handling of last week was “by hand”. • Now uses multiple data fields from the user to ensure is all correct. • Implemented via: – Cygwin installation on Maestro machine. – Perl/Tk GUI for use interview. – Launches Maestro from perl 6

HBD is inside glove box waiting… • • • Caps inside. Thorough cleaning. Test of GEM install. Test of sides install. Ready for production. 7

Valve-Legs Conflict. • After a long series of discussions with Rob Pisani, we found the ideal orientation for the valves from the viewpoint of installation. • Most orientations were impossible due to interference with HV box or magnet pole face. • However the solution we found conflicts with legs. 8

Valves as presently installed. Leg Mount Points Handle Orientation Vital Temporary Bypass Gas Inlet 9

Comments on Valves: • Install does not imply that valves must remain in this state permanently. – After all, if you can put on any plumbing inside of the glovebox you can also take it off. • Plumbing-based solutions (initially suggested by Rob) would interfere with the detector's rotation during GEM installation and thus would necessarily be applied only after the GEM installation was complete. • We believe that it would be difficult but not impossible to work on the plumbing of the detector once it is inside the glove box. • We have enough material (and time) to make new gussets with notches to accommodate the valves. 10

Schedule for Production • • First shot tomorrow (Wednesday July 18) Two shots next week. Photo-cathodes installed before July 28. Plenty of time for mid-August delivery. 11

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