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Shot-1 & Shot-2 Summary

Shot-1 & Shot-2 Summary. Stony Brook Crew. Weekly Shots. We shoot one photo-cathode each week. The “completeness” of the process grows each week. We now have two shots since the start of this mode of operation. Here we’ll summarize results from both. Bill. Andrzej. Shot-1 (Bill Anderson).

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Shot-1 & Shot-2 Summary

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  1. Shot-1 & Shot-2 Summary Stony Brook Crew

  2. Weekly Shots • We shoot one photo-cathode each week. • The “completeness” of the process grows each week. • We now have two shots since the start of this mode of operation. • Here we’ll summarize results from both. Bill Andrzej

  3. Shot-1 (Bill Anderson) • Assembly of GEM into Evap box on Laminar table. • 100 V continuity & short test. • Evaporation box inserted with Lid-on (no nubs!!) • Evaporation after “water drop” from RGA. • Local QE only…no chicklets. Water starts here Water ends here

  4. Shot-2 (Andrzej Lipski) • RailRoad on Lift Table • Controlled insertion. • Controlled flip. • High-Vacuum Feedthroughs on exaporation box: • FULLY sealed insertion/removal. • Near-final HV testing station. • Vaccuum Storage System: • Shakedown over. • 4 x 10-7 torr. • In use next shot. • 3 Chicklets! Damn Good Vacuum in Evaporator

  5. Local QE results. • Interestingly these tests are HIGHER QE than the local system produced in the past: • Known improvement is waiting for the water drop…significant? • However, system is still unstable. • Need QE of chicklets from this evaporation.

  6. Next Shot Goals: • Pizza Boxes for sets: • (Gem-Gem-AuGEM-Grid) • Back & forth to High Vacuum storage. • Gain Tests (w/o CsI) • New Wiring on local QE system. • Check-lists mounted on hardware. • Rich Lefferts runs show. New Student (Thomas Videbaek) will rewire this system

  7. Next Next Shot • Final QE Circuitry: • Multi-channel for 4 GEMs at once. • Low noise. • no sensitivity to where people stand. • Base Plate Mods: • Real bananas • Extra space milled out for leads. • Gain Test of freshly evaporated GEM. • Transfer in air on Laminar Table (quickly).

  8. Miscellaneous-1 • Top GEM was “rubbed” by cross-pieces of grid during shipping. • No other GEM showed damage.

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