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

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Presentation transcript:

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

11/22/10All Experimenter's Meeting COUPP Special Report 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 COUPP Collaboration 2

COUPP 2L Chamber Summary Dark matter search using a bubble chamber filled with CF 3 I (operates at 20-50°C and 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 11/22/10All Experimenter's Meeting COUPP Special Report3

SNOLAB Recent extension has increased the experimental space at the 6800 ft level 11/22/10All Experimenter's Meeting COUPP Special Report COUPP 2L Located in ‘J’ drift 1 mile hike to cage ride 4

Safety First Met the electrical safety authority Safety reviews with SNOLAB personnel before proceding with new procedures 11/22/10All Experimenter's Meeting COUPP Special Report5

Initial Installation DAQ, pressure vessel, and hydraulic system installed mid July Took data runs with the full hydraulic and DAQ system for three weeks 11/22/10All Experimenter's Meeting COUPP Special Report6

Inner Vessel Mark Ruschman and inner vessel arrive late August /22/10All Experimenter's Meeting COUPP Special Report7

First Bubble kg CF3I distilled on September 2nd First bubble on the next day 11/22/10All Experimenter's Meeting COUPP Special Report8

First Problem Bubbles appearing in the hydraulic fluid Organized another trip for mid October Leaking accumulator tank (AC1) swapped out Fully operational October 17th 11/22/10All Experimenter's Meeting COUPP Special Report9

Shielding 20 inch thick boxes made with 1” thick HDPE Filled with SNOLAB high purity water 11/22/10All Experimenter's Meeting COUPP Special Report Solid Poly Water Boxes Seismic Damping Completed November 5th 10

Remote Monitoring 3 Webcams Remote DAQ control SNOLAB personnel extremely helpful Real time analysis 11/22/10All Experimenter's Meeting COUPP Special Report11

Current Status Maintaining ~85% live time 11/22/10All Experimenter's Meeting COUPP Special Report Shield Installed Leaking Accumulator Tank Planned Power Outage 12