Dark matter limits from a 2L C3F8 filled bubble chamber /
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| Author / Creator: | Robinson, Alan Edward, author. |
|---|---|
| Imprint: | 2015. Ann Arbor : ProQuest Dissertations & Theses, 2015 |
| Description: | 1 electronic resource (321 pages) |
| Language: | English |
| Format: | E-Resource Dissertations |
| Local Note: | School code: 0330 |
| URL for this record: | http://pi.lib.uchicago.edu/1001/cat/bib/10773351 |
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| 100 | 1 | |a Robinson, Alan Edward, |e author. | |
| 245 | 1 | 0 | |a Dark matter limits from a 2L C3F8 filled bubble chamber / |c Robinson, Alan Edward. |
| 260 | |c 2015. | ||
| 264 | 1 | |a Ann Arbor : |b ProQuest Dissertations & Theses, |c 2015 | |
| 300 | |a 1 electronic resource (321 pages) | ||
| 336 | |a text |b txt |2 rdacontent | ||
| 337 | |a computer |b c |2 rdamedia | ||
| 338 | |a online resource |b cr |2 rdacarrier | ||
| 500 | |a Advisors: Juan I. Collar Committee members: Luca Grandi; Phillippe Guyot-Sionnest; Dan Hooper. | ||
| 502 | |b Ph.D. |c The University of Chicago, Division of the Physical Sciences, Department of Physics |d 2015. | ||
| 510 | 4 | |a Dissertation Abstracts International, |c Volume: 77-05(E), Section: B. | |
| 520 | |a The PICO-2L C3F8 bubble chamber search for Weakly Interacting Massive Particle (WIMP) dark matter was operated in the SNOLAB underground laboratory at the same location as the previous CF3I filled COUPP-4kg detector. Neutron calibrations using photoneutron sources in C3F8 and CF3I filled calibration bubble chambers were performed to verify the sensitivity of these target fluids to dark matter scattering. This data was combined with similar measurements using a low-energy neutron beam at the University of Montreal and in situ calibrations of the PICO-2L and COUPP-4kg detectors. C3F 8 provides much greater sensitivity to WIMP-proton scattering than CF 3I in bubble chamber detectors. | ||
| 520 | |a PICO-2L searched for dark matter recoils with energy thresholds below 10 keV. Radiopurity assays of detector materials were performed and the expected neutron recoil background was evaluated to be 1.6 +0.3-0.9 single bubble events during the 211.5 kg-day exposure. Twelve single bubble dark matter candidate events were observed. These events were not uniformly distributed in time, and were likely caused by particulates in the active volume. Despite this background, PICO-2L sets a world-leading upper limit to the WIMP-proton spin dependent scattering cross-section. | ||
| 546 | |a English | ||
| 590 | |a School code: 0330 | ||
| 690 | |a Astrophysics. | ||
| 690 | |a Physics. | ||
| 710 | 2 | |a University of Chicago. |e degree granting institution. | |
| 720 | 1 | |a Juan I. Collar |e degree supervisor. | |
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| 928 | |t Library of Congress classification |l Online |c UC-FullText |u http://dx.doi.org/10.6082/M12F7KCJ |z Knowledge@UChicago |g ebooks |i 9369775 | ||