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Increasing the energy dynamic range of solid-state nuclear track detectors using multiple surfaces.

A B Zylstra1, H G Rinderknecht, N Sinenian

  • 1Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. zylstra@mit.edu

The Review of Scientific Instruments
|September 8, 2011
PubMed
Summary
This summary is machine-generated.

Dual-sided CR-39 detectors improve inertial confinement fusion (ICF) diagnostics by extending particle energy range. Distinct front and back calibrations are essential due to non-uniform energy deposition, enhancing detectable energies by up to 7-8 MeV.

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Area of Science:

  • Nuclear physics
  • Plasma physics
  • Materials science

Background:

  • Solid-state nuclear track detectors like CR-39 are crucial for physics and inertial confinement fusion (ICF) experiments.
  • In ICF, D(3)He-protons have ranges comparable to detector thickness, limiting measurements.
  • Utilizing both front and back surfaces of detectors can extend dynamic range for higher energy particles.

Purpose of the Study:

  • To investigate differences in track formation on the front and back surfaces of CR-39 detectors.
  • To develop distinct front and back energy calibrations for CR-39 detectors for proton detection.
  • To determine the potential for extending the detectable energy range using dual-surface calibration.

Main Methods:

  • Experimental studies of track formation on CR-39 under front and back surface conditions.
  • Development and presentation of distinct front and back energy calibrations for protons.
  • Monte Carlo simulations to explore the track formation process and energy deposition.

Main Results:

  • Significant differences in track formation were observed between the front and back surfaces of CR-39 detectors.
  • Distinct front and back energy calibrations for protons were successfully established.
  • Utilizing multiple surfaces with additional calibrations extended the detectable energy range on a single CR-39 piece by up to 7-8 MeV.

Conclusions:

  • Dual-surface CR-39 detection with specific calibrations is necessary for accurate ICF diagnostics.
  • Non-uniform ion energy deposition in matter is the primary cause for front-back track formation differences.
  • This method significantly enhances the energy measurement capabilities of CR-39 detectors in ICF research.