Speaker
Dr
Russell Neilson
(University of Chicago (US))
Description
Data will be reported from the operation of a 4.0 kg CF3I bubble chamber in the 6800 foot deep SNOLAB underground laboratory. The effectiveness of ultrasound analysis in discriminating alpha decay background events from single nuclear recoils has been confirmed. The total exposure was 553 kg-days distributed over three different bubble nucleation thresholds. This observation provides world best direct detection constraints on WIMP-proton spin-dependent scattering for WIMP masses >20 GeV/c^2 and demonstrates significant sensitivity for spin-independent interactions. Updates on progress towards operation of larger scale bubble chambers will also be presented.
Financial Support Justification for Early-Stage Researchers
Due to the high cost and long travel time from Chicago to Melbourne, some financial support would be greatly appreciated.
Author
Dr
Russell Neilson
(University of Chicago (US))
