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Korsch W, Broering M, Timsina A, Leung KKH, Abney J, Budker D, Filippone BW, He J, Kandu S, McCrea M, Roy M, Swank C, Yao W. Electric charging effects on insulating surfaces in cryogenic liquids. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2024; 95:043101. [PMID: 38557888 DOI: 10.1063/5.0195101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 03/14/2024] [Indexed: 04/04/2024]
Abstract
This paper presents a new technique to study the adsorption and desorption of ions and electrons on insulating surfaces in the presence of strong electric fields in cryoliquids. The experimental design consists of a compact cryostat coupled with a sensitive electro-optical Kerr device to monitor the stability of the electric fields. The behavior of nitrogen and helium ions on a poly(methyl methacrylate) (PMMA) surface was compared to a PMMA surface coated with a mixture of deuterated polystyrene and deuterated polybutadiene. Ion accumulation and removal on these surfaces were unambiguously observed. Within the precision of the data, both surfaces behave similarly for the physisorbed ions. The setup was also used to measure the (quasi-)static dielectric constant of PMMA at T ≈ 70 K. The impact of the ion adsorption on the search for a neutron permanent electric dipole moment in a cryogenic environment, such as the nEDM@SNS experiment, is discussed.
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Affiliation(s)
- Wolfgang Korsch
- Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Mark Broering
- Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA
- Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA
| | - Ashok Timsina
- Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Kent K H Leung
- Department of Physics and Astronomy, Montclair State University, Montclair, New Jersey 07043, USA
| | - Joshua Abney
- Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Dmitry Budker
- Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany
- Helmholtz-Institut, GSI Helmholtzzentrum für Schwerionenforschung, 55128 Mainz, Germany
- Department of Physics, University of California, Berkeley, California 94720-7300, USA
| | - Bradley W Filippone
- Lauritsen Laboratory, California Institute of Technology, Pasadena, California 91125, USA
| | - Jiachen He
- Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Suman Kandu
- Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Mark McCrea
- Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA
- Department of Physics, University of Winnipeg, Winnipeg, Manitoba R3B 2E9, Canada
| | - Murchhana Roy
- Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Christopher Swank
- Lauritsen Laboratory, California Institute of Technology, Pasadena, California 91125, USA
| | - Weijun Yao
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA
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Ranjkesh A, Kiani S, Parast MH, Zakerhamidi MS, Yoon TH. Characterization of short-range molecular interaction by empirical solvent polarity scale to analyze the Kerr effect of nematic liquid crystals in the isotropic phase. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111653] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Skomorowski W, Moszynski R. Kerr and Cotton–Mouton effects in atomic gases: a quantum-statistical study. Mol Phys 2013. [DOI: 10.1080/00268976.2013.804959] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Wojciech Skomorowski
- a Faculty of Chemistry , University of Warsaw , Pasteura 1, Warsaw , 02-093 , Poland
| | - Robert Moszynski
- a Faculty of Chemistry , University of Warsaw , Pasteura 1, Warsaw , 02-093 , Poland
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Park BK, Sushkov AO, Budker D. Precision polarimetry with real-time mitigation of optical-window birefringence. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:013108. [PMID: 18248023 DOI: 10.1063/1.2835902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Optical-window birefringence is frequently a major obstacle in experiments measuring changes in the polarization state of light traversing a sample under investigation. It can contribute a signal indistinguishable from that due to the sample and complicate the analysis. Here, we explore a method to measure and compensate for the birefringence of an optical window using the reflection from the last optical surface before the sample. We demonstrate that this arrangement can cancel out false signals due to the optical-window birefringence-induced ellipticity drift to about 1%, for the values of total ellipticity less than 0.25 rad.
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Affiliation(s)
- B K Park
- Department of Physics, University of California, Berkeley, California 94720-7300, USA.
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