A solenoidal electron spectrometer for a precision measurement of the neutron β-asymmetry with ultracold neutrons

B. Plaster, R. Carr, B. W. Filippone, D. Harrison, J. Hsiao, T. M. Ito, J. Liu, J. W. Martin, B. Tipton, J. Yuan

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

We describe an electron spectrometer designed for a precision measurement of the neutron β-asymmetry with spin-polarized ultracold neutrons. The spectrometer consists of a 1.0-T solenoidal field with two identical multiwire proportional chamber and plastic scintillator electron detector packages situated within 0.6-T field-expansion regions. Select results from performance studies of the spectrometer with calibration sources are reported.

Original languageEnglish
Pages (from-to)587-598
Number of pages12
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume595
Issue number3
DOIs
StatePublished - Oct 11 2008

Bibliographical note

Funding Information:
We thank R. Cortez and J. Pendlay for their skillful technical contributions to the design, fabrication, and deployment of the detector systems. We thank S. Currie for his devoted efforts to the operation and maintenance of the helium liquefaction plant. We thank the entire UCNA collaboration for many valuable suggestions. This work was supported in part by the National Science Foundation under grant numbers PHY-0079767 (a Major Research Instrumentation Program grant), PHY-0244899, PHY-0555674, and also by the Natural Sciences and Engineering Research Council of Canada.

Keywords

  • Low-energy electron magnetic spectrometer
  • Neutron β-decay
  • Ultracold neutrons

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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