2026-09-19T11:55:41Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/1270932021-07-05T14:03:20Zcom_1721.1_7582com_1721.1_7581col_1721.1_131024
Maria Gatu Johnson and Richard Petrasso.
Przybocki, Ryan.
Massachusetts Institute of Technology. Department of Physics.
Massachusetts Institute of Technology. Department of Physics
2020-09-03T17:46:39Z
2020-09-03T17:46:39Z
2020
2020
https://hdl.handle.net/1721.1/127093
1191824344
Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2020
Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 44-45).
CR39 is a plastic nuclear track detector used at inertial confinement fusion (ICF) facilities to characterize the energy spectra of fusion products. This thesis presents data collected at MIT's Linear Electrostatic Ion Accelerator (LEIA) to measure CR39's detection efficiency for protons at non-normal incidence to CR39 detectors. We specifically study protons resulting from D-D fusion reactions with incident angles up to 50 degrees. Understanding the CR39 response to charged particles at an angle is essential to designing a D-D neutron spectrometer at the Z facility, which uses CR39 to detect protons incident at an angle. We find that small adjustments of 10 degrees have no effect on detection efficiency, and high detection efficiency is preserved up through 25 degrees in the range of 1.0 to 2.1 MeV. For the ICF applications, incident angles above 30 degrees are generally impractical for spectrometer design due to significant drops in proton detection. We compare the experimental results to related theoretical simulations, proposing significant constraints on these theoretical models of detection efficiency.
by Ryan Przybocki.
S.B.
S.B. Massachusetts Institute of Technology, Department of Physics
45 pages
eng
Massachusetts Institute of Technology
MIT theses may be protected by copyright. Please reuse MIT thesis content according to the MIT Libraries Permissions Policy, which is available through the URL provided.
http://dspace.mit.edu/handle/1721.1/7582
Physics.
Investigation of non-normal incidence charged-particle response of CR39 nuclear track detectors, with applications in nuclear diagnostics for inertial confinement fusion
Thesis
application/pdf
2020-09-03T17:46:39Z
Publication
Bachelor
Phys
unknown
unknown
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<Abstract>CR39 is a plastic nuclear track detector used at inertial confinement fusion (ICF) facilities to characterize the energy spectra of fusion products. This thesis presents data collected at MIT's Linear Electrostatic Ion Accelerator (LEIA) to measure CR39's detection efficiency for protons at non-normal incidence to CR39 detectors. We specifically study protons resulting from D-D fusion reactions with incident angles up to 50 degrees. Understanding the CR39 response to charged particles at an angle is essential to designing a D-D neutron spectrometer at the Z facility, which uses CR39 to detect protons incident at an angle. We find that small adjustments of 10 degrees have no effect on detection efficiency, and high detection efficiency is preserved up through 25 degrees in the range of 1.0 to 2.1 MeV. For the ICF applications, incident angles above 30 degrees are generally impractical for spectrometer design due to significant drops in proton detection. We compare the experimental results to related theoretical simulations, proposing significant constraints on these theoretical models of detection efficiency.</Abstract>
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