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Status of the COUPP 2-Liter Detector

Status of the COUPP 2-Liter Detector. University of Chicago Juan Collar (PI, spokesperson), C. Eric Dahl, Drew Fustin, Matthew Szydagis Indiana University South Bend Ed Behnke, Ilan Levine (PI), Andrea Palenchar, Tina Shepherd, Brendan Sweeney Fermilab

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Status of the COUPP 2-Liter Detector

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  1. Status of the COUPP 2-Liter Detector University of Chicago Juan Collar (PI, spokesperson), C. Eric Dahl, Drew Fustin, Matthew Szydagis Indiana University South Bend Ed Behnke, Ilan Levine (PI), Andrea Palenchar, Tina Shepherd, Brendan Sweeney Fermilab Steve Brice, Dan Broemmelsiek, Peter Cooper, Mike Crisler, Jeter Hall, Erik Ramberg, Andrew Sonnenschein, Bob Tschirhart All Experimenters' Meeting

  2. COUPP 2-Liter • Upgrade of 1-Liter chamber (last ran in 2008), with • Synthetic silica vessel • Reduce wall rate (alphas) • Improvements to • DAQ • Lighting • Instrumentation (P, T, acoustic) • Pressure, Temperature Regulation • New muon veto • Liquid scintillator instead of paddles • Doubles as neutron moderator photo - Mark Ruschman All Experimenters' Meeting

  3. July 17 - Installation in MINOS photo - Mark Ruschman All Experimenters' Meeting

  4. August 17 - August 19, CF3I Fill 3.6 kg (First new result - CF3I and H2O form a clathrate) All Experimenters' Meeting

  5. August 19 - First Bubbles Triple scatter of AmBe neutron: All Experimenters' Meeting

  6. Wall Events Eliminated 1-Liter 2-Liter (preliminary position reconstruction) All Experimenters' Meeting

  7. Event Rate History • Initial Radon spike (~20 events/kg-day) • Still to add • Muon Veto • Neutron shield • Acoustic alpha rejection? (Aubin et al., arXiv:0807.1536) All Experimenters' Meeting

  8. Example Beam Coincident Event 15 Bubbles! (not typical, likely nuclear disintegration) All Experimenters' Meeting

  9. Next Step: Muon Veto / Neutron Shield Scintillator Tank photo - Mark Ruschman All Experimenters' Meeting

  10. Also coming soon: 30-Liter Chamber • Engineering run underway in D0 photo - Russ Rucinski All Experimenters' Meeting

  11. Thanks to- • PPD Mechanical • Russ Rucinsky • Rich Schmitt • John Rauch • Cary Kendziora’s shop, esp Mark Ruschman • John Voirin’s shop • PPD Technical • John Korienek • Carl Lindenmeyer • Jerry Zimmerman • Todd Nebel • IUSB • Joshua Behnke • Andrea Vollrath • Phil Mark All Experimenters' Meeting

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