期刊
JOURNAL OF INSTRUMENTATION
卷 14, 期 -, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1748-0221/14/11/P11017
关键词
Noble liquid detectors (scintillation, ionization, double-phase); Cryogenic detectors; Large detector systems for particle and astroparticle physics; Neutron detectors (cold, thermal, fast neutrons)
资金
- U.S. Department of Energy [DE-AC02-06CH11357, DE-AC05-00OR22725, DE-AC52-06NA25396, DE-FG02-94ER40818, DE-FG02-97ER41042, DE-FG02-99ER41101, DE-SC0014622, DE-SC0008107, DE-SC0005367, 2017LANLEEDM]
- National Science Foundation [1306547, 1205977, 1506459, 1812340, 1440011, 1506416]
- U.S. Department of Energy (DOE) [DE-FG02-99ER41101, DE-SC0005367, DE-SC0008107, DE-SC0014622] Funding Source: U.S. Department of Energy (DOE)
A cryogenic apparatus is described that enables a new experiment, nEDM@SNS, with a major improvement in sensitivity compared to the existing limit in the search for a neutron Electric Dipole Moment (EDM). This apparatus uses superfluid He-4 to produce a high density of Ultra-Cold Neutrons (UCN) which are contained in a suitably coated pair of measurement cells. The experiment, to be operated at the Spallation Neutron Source at Oak Ridge National Laboratory, uses polarized He-3 from an Atomic Beam Source injected into the superfluid He-4 and transported to the measurement cells where it serves as a co-magnetometer. The superfluid He-4 is also used as an insulating medium allowing significantly higher electric fields, compared to previous experiments, to be maintained across the measurement cells. These features provide an ultimate statistical uncertainty for the EDM of 2 - 3 x 10(-28) e-cm, with anticipated systematic uncertainties below this level.
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