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Rosenberg MJ, Séguin FH, Waugh CJ, et al. Empirical assessment of the detection efficiency of CR-39 at high proton fluence and a compact, proton detector for high-fluence applications. Rev Sci Instrum. 2014;85(4):043302doi: 10.1063/1.4870898.
Rosenberg, M. J., Séguin, F. H., Waugh, C. J., Rinderknecht, H. G., Orozco, D., Frenje, J. A., Johnson, M. G., Sio, H., Zylstra, A. B., Sinenian, N., Li, C. K., Petrasso, R. D., Glebov, V. Y., Stoeckl, C., Hohenberger, M., Sangster, T. C., LePape, S., Mackinnon, A. J., Bionta, R. M., Landen, O. L., Zacharias, R. A., Kim, Y., Herrmann, H. W., & Kilkenny, J. D. (2014). Empirical assessment of the detection efficiency of CR-39 at high proton fluence and a compact, proton detector for high-fluence applications. The Review of scientific instruments, 85(4), 043302. https://doi.org/10.1063/1.4870898
Rosenberg, M J, et al. "Empirical assessment of the detection efficiency of CR-39 at high proton fluence and a compact, proton detector for high-fluence applications." The Review of scientific instruments vol. 85,4 (2014): 043302. doi: https://doi.org/10.1063/1.4870898
Rosenberg MJ, Séguin FH, Waugh CJ, Rinderknecht HG, Orozco D, Frenje JA, Johnson MG, Sio H, Zylstra AB, Sinenian N, Li CK, Petrasso RD, Glebov VY, Stoeckl C, Hohenberger M, Sangster TC, LePape S, Mackinnon AJ, Bionta RM, Landen OL, Zacharias RA, Kim Y, Herrmann HW, Kilkenny JD. Empirical assessment of the detection efficiency of CR-39 at high proton fluence and a compact, proton detector for high-fluence applications. Rev Sci Instrum. 2014 Apr;85(4):043302. doi: 10.1063/1.4870898. PMID: 24784597.
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Rev Sci Instrum. 2014 Apr;85(4):043302. doi: 10.1063/1.4870898.

Empirical assessment of the detection efficiency of CR-39 at high proton fluence and a compact, proton detector for high-fluence applications.

The Review of scientific instruments

M J Rosenberg, F H Séguin, C J Waugh, H G Rinderknecht, D Orozco, J A Frenje, M Gatu Johnson, H Sio, A B Zylstra, N Sinenian, C K Li, R D Petrasso, V Yu Glebov, C Stoeckl, M Hohenberger, T C Sangster, S LePape, A J Mackinnon, R M Bionta, O L Landen, R A Zacharias, Y Kim, H W Herrmann, J D Kilkenny

Affiliations

  1. Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
  2. Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.
  3. Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
  4. Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  5. General Atomics, San Diego, California 92186, USA.

PMID: 24784597 DOI: 10.1063/1.4870898

Abstract

CR-39 solid-state nuclear track detectors are widely used in physics and in many inertial confinement fusion (ICF) experiments, and under ideal conditions these detectors have 100% detection efficiency for ∼0.5-8 MeV protons. When the fluence of incident particles becomes too high, overlap of particle tracks leads to under-counting at typical processing conditions (5 h etch in 6N NaOH at 80 °C). Short etch times required to avoid overlap can cause under-counting as well, as tracks are not fully developed. Experiments have determined the minimum etch times for 100% detection of 1.7-4.3-MeV protons and established that for 2.4-MeV protons, relevant for detection of DD protons, the maximum fluence that can be detected using normal processing techniques is ≲3 × 10(6) cm(-2). A CR-39-based proton detector has been developed to mitigate issues related to high particle fluences on ICF facilities. Using a pinhole and scattering foil several mm in front of the CR-39, proton fluences at the CR-39 are reduced by more than a factor of ∼50, increasing the operating yield upper limit by a comparable amount.

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