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A liquid helium target system for a measurement of parity violation in neutron spin rotation

Publication ,  Journal Article
Bass, CD; Bass, TD; Heckel, BR; Huffer, CR; Luo, D; Markoff, DM; Micherdzinska, AM; Snow, WM; Swanson, HE; Walbridge, SC
Published in: Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
December 21, 2009
Published version (DOI)

A liquid helium target system was designed and built to perform a precision measurement of the parity-violating neutron spin rotation in helium due to the nucleon-nucleon weak interaction. The measurement employed a beam of low energy neutrons that passed through a crossed neutron polarizer-analyzer pair with the liquid helium target system located between them. Changes between the target states generated differences in the beam transmission through the polarizer-analyzer pair. The amount of parity-violating spin rotation was determined from the measured beam transmission asymmetries. The expected parity-violating spin rotation of order 10- 6 rad placed severe constraints on the target design. In particular, isolation of the parity-odd component of the spin rotation from a much larger background rotation caused by magnetic fields required that a nonmagnetic cryostat and target system be supported inside the magnetic shielding, while allowing nonmagnetic motion of liquid helium between separated target chambers. This paper provides a detailed description of the design, function, and performance of the liquid helium target system.

Duke Scholars

Diane M Markoff
Author Diane M Markoff Physics

Published In

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

DOI

10.1016/j.nima.2009.10.055

ISSN

0168-9002

Publication Date

December 21, 2009

Volume

612

Issue

1

Start / End Page

69 / 82

Related Subject Headings

  • Nuclear & Particles Physics
  • 5106 Nuclear and plasma physics
  • 0299 Other Physical Sciences
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
 

Citation

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ICMJE
MLA
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Bass, C. D., Bass, T. D., Heckel, B. R., Huffer, C. R., Luo, D., Markoff, D. M., … Walbridge, S. C. (2009). A liquid helium target system for a measurement of parity violation in neutron spin rotation. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment, 612(1), 69–82. https://doi.org/10.1016/j.nima.2009.10.055
Bass, C. D., T. D. Bass, B. R. Heckel, C. R. Huffer, D. Luo, D. M. Markoff, A. M. Micherdzinska, W. M. Snow, H. E. Swanson, and S. C. Walbridge. “A liquid helium target system for a measurement of parity violation in neutron spin rotation.” Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 612, no. 1 (December 21, 2009): 69–82. https://doi.org/10.1016/j.nima.2009.10.055.
Bass CD, Bass TD, Heckel BR, Huffer CR, Luo D, Markoff DM, et al. A liquid helium target system for a measurement of parity violation in neutron spin rotation. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment. 2009 Dec 21;612(1):69–82.
Bass, C. D., et al. “A liquid helium target system for a measurement of parity violation in neutron spin rotation.” Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment, vol. 612, no. 1, Dec. 2009, pp. 69–82. Scopus, doi:10.1016/j.nima.2009.10.055.
Bass CD, Bass TD, Heckel BR, Huffer CR, Luo D, Markoff DM, Micherdzinska AM, Snow WM, Swanson HE, Walbridge SC. A liquid helium target system for a measurement of parity violation in neutron spin rotation. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment. 2009 Dec 21;612(1):69–82.
Journal cover image

Published In

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment

DOI

10.1016/j.nima.2009.10.055

ISSN

0168-9002

Publication Date

December 21, 2009

Volume

612

Issue

1

Start / End Page

69 / 82

Related Subject Headings

  • Nuclear & Particles Physics
  • 5106 Nuclear and plasma physics
  • 0299 Other Physical Sciences
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences