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Leung K, Ahmed M, Alarcon R, Aleksandrova A, Baeßler S, Barrón-Palos L, Bartoszek L, Beck D, Behzadipour M, Bessuille J, Blatnik M, Broering M, Broussard L, Busch M, Carr R, Chu PH, Cianciolo V, Clayton S, Cooper M, Crawford C, Currie S, Daurer C, Dipert R, Dow K, Dutta D, Efremenko Y, Erickson C, Filippone B, Fomin N, Gao H, Golub R, Gould C, Greene G, Haase D, Hasell D, Hawari A, Hayden M, Holley A, Holt R, Huffman P, Ihloff E, Ito T, Kelsey J, Kim Y, Korobkina E, Korsch W, Lamoreaux S, Leggett E, Lipman A, Liu CY, Long J, MacDonald S, Makela M, Matlashov A, Maxwell J, McCrea M, Mendenhall M, Meyer H, Milner R, Mueller P, Nouri N, O'Shaughnessy C, Osthelder C, Peng JC, Penttila S, Phan N, Plaster B, Ramsey J, Rao T, Redwine R, Reid A, Saftah A, Seidel G, Silvera I, Slutsky S, Smith E, Snow W, Sondheim W, Sosothikul S, Stanislaus T, Sun X, Swank C, Tang Z, Dinani RT, Tsentalovich E, Vidal C, Wei W, White C, Williamson S, Yang L, Yao W, Young A. The neutron electric dipole moment experiment at the Spallation Neutron Source. EPJ WEB OF CONFERENCES 2019. [DOI: 10.1051/epjconf/201921902005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Novel experimental techniques are required to make the next big leap in neutron electric dipole moment experimental sensitivity, both in terms of statistics and systematic error control. The nEDM experiment at the Spallation Neutron Source (nEDM@SNS) will implement the scheme of Golub & Lamoreaux [Phys. Rep., 237, 1 (1994)]. The unique properties of combining polarized ultracold neutrons, polarized 3He, and superfluid 4He will be exploited to provide a sensitivity to ∼ 10−28 e · cm. Our cryogenic apparatus will deploy two small (3 L) measurement cells with a high density of ultracold neutrons produced and spin analyzed in situ. The electric field strength, precession time, magnetic shielding, and detected UCN number will all be enhanced compared to previous room temperature Ramsey measurements. Our 3He co-magnetometer offers unique control of systematic effects, in particular the Bloch-Siegert induced false EDM. Furthermore, there will be two distinct measurement modes: free precession and dressed spin. This will provide an important self-check of our results. Following five years of “critical component demonstration,” our collaboration transitioned to a “large scale integration” phase in 2018. An overview of our measurement techniques, experimental design, and brief updates are described in these proceedings.
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Saggu P, Mineeva T, Arif M, Cory DG, Haun R, Heacock B, Huber MG, Li K, Nsofini J, Sarenac D, Shahi CB, Skavysh V, Snow WM, Werner SA, Young AR, Pushin DA. Decoupling of a neutron interferometer from temperature gradients. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:123507. [PMID: 28040910 PMCID: PMC8634150 DOI: 10.1063/1.4971851] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Neutron interferometry enables precision measurements that are typically operated within elaborate, multi-layered facilities which provide substantial shielding from environmental noise. These facilities are necessary to maintain the coherence requirements in a perfect crystal neutron interferometer which is extremely sensitive to local environmental conditions such as temperature gradients across the interferometer, external vibrations, and acoustic waves. The ease of operation and breadth of applications of perfect crystal neutron interferometry would greatly benefit from a mode of operation which relaxes these stringent isolation requirements. Here, the INDEX Collaboration and National Institute of Standards and Technology demonstrates the functionality of a neutron interferometer in vacuum and characterize the use of a compact vacuum chamber enclosure as a means to isolate the interferometer from spatial temperature gradients and time-dependent temperature fluctuations. The vacuum chamber is found to have no depreciable effect on the performance of the interferometer (contrast) while improving system stability, thereby showing that it is feasible to replace large temperature isolation and control systems with a compact vacuum enclosure for perfect crystal neutron interferometry.
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Affiliation(s)
- P. Saggu
- Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L3G1, Canada
| | - T. Mineeva
- Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L3G1, Canada
- Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L3G1, Canada
| | - M. Arif
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - D. G. Cory
- Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L3G1, Canada
- Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L3G1, Canada
- Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada
- Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2L2Y5, Canada
| | - R. Haun
- Department of Physics, Tulane University, New Orleans, Louisiana 70118, USA
| | - B. Heacock
- Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA
- Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
| | - M. G. Huber
- National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - K. Li
- Department of Physics, Indiana University, Bloomington, Indiana 47408, USA
- Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47408, USA
| | - J. Nsofini
- Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L3G1, Canada
- Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L3G1, Canada
| | - D. Sarenac
- Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L3G1, Canada
- Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L3G1, Canada
| | - C. B. Shahi
- Department of Physics, Tulane University, New Orleans, Louisiana 70118, USA
| | - V. Skavysh
- Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA
| | - W. M. Snow
- Department of Physics, Indiana University, Bloomington, Indiana 47408, USA
- Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47408, USA
| | - S. A. Werner
- Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - A. R. Young
- Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA
- Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
| | - D. A. Pushin
- Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L3G1, Canada
- Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L3G1, Canada
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