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COUPP 2L Chamber at SNOLAB

COUPP 2L Chamber at SNOLAB. Jeter Hall Fermilab Center for Particle Astrophysics. COUPP Collaboration. University of Chicago Juan Collar (PI, spokesperson), C. Eric Dahl, Drew Fustin , Alan Robinson, Matthew Szydagis Indiana University South Bend

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COUPP 2L Chamber at SNOLAB

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  1. COUPP 2L Chamber at SNOLAB Jeter Hall Fermilab Center for Particle Astrophysics

  2. COUPP Collaboration University of Chicago Juan Collar (PI, spokesperson), C. Eric Dahl, Drew Fustin, Alan Robinson, Matthew Szydagis Indiana University South Bend Ed Behnke, Joshua Behnke, Austin Conner, J. Henry Hennefeld, Ilan Levine (PI), Andrea Palenchar, Tim Raymond, Tina Shepherd, Brendan Sweeney Fermilab Steve Brice, Dan Broemmelsiek, Peter Cooper, Mike Crisler, Jeter Hall, Martin Hu, Hugh Lippincott, Erik Ramberg,Andrew Sonnenschein All Experimenter's Meeting COUPP Special Report

  3. COUPP 2L Chamber Summary • Dark matter search using a bubble chamber filled with CF3I (operates at 20-50°C and 15-100 PSI) • 2009 run in MINOS near hall was limited by cosmic radiation (300 ft overburden) • Summer 2010 detector moved to SNOLAB in Ontario (6800 ft overburden) • Chamber is now operational, shielded, and taking science quality data All Experimenter's Meeting COUPP Special Report

  4. SNOLAB • Recent extension has increased the experimental space at the 6800 ft level COUPP 2L Located in ‘J’ drift 1 mile hike to cage ride All Experimenter's Meeting COUPP Special Report

  5. Safety First • Met the electrical safety authority • Safety reviews with SNOLAB personnel before proceding with new procedures All Experimenter's Meeting COUPP Special Report

  6. Initial Installation • DAQ, pressure vessel, and hydraulic system installed mid July • Took data runs with the full hydraulic and DAQ system for three weeks All Experimenter's Meeting COUPP Special Report

  7. Inner Vessel • Mark Ruschman and inner vessel arrive late August 2010 All Experimenter's Meeting COUPP Special Report

  8. First Bubble • 4.048 kg CF3I distilled on September 2nd • First bubble on the next day All Experimenter's Meeting COUPP Special Report

  9. First Problem • Bubbles appearing in the hydraulic fluid • Organized another trip for mid October • Leaking accumulator tank (AC1) swapped out • Fully operational October 17th All Experimenter's Meeting COUPP Special Report

  10. Shielding • 20 inch thick boxes made with 1” thick HDPE • Filled with SNOLAB high purity water Water Boxes Completed November 5th Solid Poly Seismic Damping All Experimenter's Meeting COUPP Special Report

  11. Remote Monitoring • 3 Webcams • Remote DAQ control • SNOLAB personnel extremely helpful • Real time analysis All Experimenter's Meeting COUPP Special Report

  12. Current Status Shield Installed • Maintaining ~85% live time Planned Power Outage Leaking Accumulator Tank All Experimenter's Meeting COUPP Special Report

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