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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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The aCORN Backscatter-Suppressed Beta Spectrometer.

M T Hassan1, F Bateman2, B Collett3

  • 1Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118, USA.

Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
|May 17, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces a novel backscatter-suppressed beta spectrometer designed to minimize electron scattering effects. The spectrometer enhances experimental accuracy by efficiently admitting electrons while reducing backscatter probability.

Keywords:
conversion electronselectron backscatterelectron spectroscopyneutron decayscintillation detectors

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Area of Science:

  • Nuclear Physics
  • Particle Physics
  • Experimental Physics

Background:

  • Electron backscattering in beta spectrometers causes experimental inaccuracies due to incomplete energy deposition.
  • Accurate measurement of fundamental particle properties requires minimizing such systematic errors.

Purpose of the Study:

  • To present the design and operation of a novel backscatter-suppressed beta spectrometer.
  • To improve the precision of measurements involving electron detection, such as the electron-antineutrino correlation coefficient in neutron beta decay (aCORN).

Main Methods:

  • Incorporation of an array of backscatter veto detectors surrounding a plastic scintillator beta energy detector.
  • Utilizing an axial magnetic field gradient to efficiently admit electrons and minimize backscattering probability.
  • Detailed discussion of the spectrometer's design, construction, and calibration procedures.

Main Results:

  • The developed spectrometer effectively suppresses electron backscatter, reducing undesirable effects in experiments.
  • The design facilitates efficient electron admission while significantly lowering the probability of backscattered electrons re-entering the detector.
  • Calibration and performance tests confirm the spectrometer's efficacy.

Conclusions:

  • The backscatter-suppressed beta spectrometer is a valuable tool for high-precision measurements in nuclear and particle physics.
  • This design advancement addresses a critical challenge in beta spectroscopy, enabling more accurate data acquisition.
  • The spectrometer's performance is well-characterized and suitable for experiments like aCORN.