Stony Brook Update T.K. Hemmick for the Stony Brook Crew
If cryos are cold, Why is it smoking? • Cryo compressor on loan • ONLY unit in the United States. • We are 1st “loaner” customer for RICOR cryos. • Cryo is cold and working. • 1st four Production GEMs are in evaporator!
For every pump that is recovered… • 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) Dead Alive
Need to make QE system faster. • New dual-measure pAmmeter. • New LabVIEW-based QE DAQ. • Location via “string pot” • Dry run of system using “current box” as source expected today.
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!
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
HBD is inside glove box waiting… • Caps inside. • Thorough cleaning. • Test of GEM install. • Test of sides install. • Ready for production.
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.
Valves as presently installed. Leg Mount Points Handle Orientation Vital Temporary Bypass Gas Inlet
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.
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.