Impact of x-ray dose on the response of CR-39 nuclear track detector to 1-5.5 MeV alphas and 0.5-9.1 MeV protons for spectroscopy at the OMEGA Laser Facility and the National Ignition Facility
Thesis: S.B., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, June 2016.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2017
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| Online Access: | http://hdl.handle.net/1721.1/106770 |
| _version_ | 1826215518068015104 |
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| author | Rojas, Jimmy A. (Rojas Herrera) |
| author2 | Richard Petrasso. |
| author_facet | Richard Petrasso. Rojas, Jimmy A. (Rojas Herrera) |
| author_sort | Rojas, Jimmy A. (Rojas Herrera) |
| collection | MIT |
| description | Thesis: S.B., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, June 2016. |
| first_indexed | 2024-09-23T16:34:04Z |
| format | Thesis |
| id | mit-1721.1/106770 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T16:34:04Z |
| publishDate | 2017 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1067702019-04-12T17:37:35Z Impact of x-ray dose on the response of CR-39 nuclear track detector to 1-5.5 MeV alphas and 0.5-9.1 MeV protons for spectroscopy at the OMEGA Laser Facility and the National Ignition Facility Rojas, Jimmy A. (Rojas Herrera) Richard Petrasso. Massachusetts Institute of Technology. Department of Nuclear Science and Engineering. Massachusetts Institute of Technology. Department of Nuclear Science and Engineering. Nuclear Science and Engineering. Thesis: S.B., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, June 2016. Page 47 blank. Cataloged from PDF version of thesis. Includes bibliographical references (pages 45-46). The CR-39 nuclear track detector is used in many nuclear diagnostics fielded at inertial confinement fusion (ICF) facilities. Large x-ray fluences generated by ICF experiments may impact the CR-39 response to incident charged particles. To determine the impact of x-ray exposure on the CR-39 response to protons and alpha particles, a thick-target bremsstrahlung x-ray generator was used to expose CR-39 to various doses of 30 and 8keV Cu-K[alpha] and K[beta] x-rays. The CR-39 detectors were then exposed to 1-5.5 MeV alphas or 0.5- 9.1 MeV protons. The regions of the CR-39 exposed to x-rays showed a smaller track diameter than those not exposed to x-rays: for example, a dose of 3.0±0.1 Gy causes a decrease of (19±2)% in the track diameter of a 5.5 MeV alpha, while a dose of 6.0±0.1 Gy results in a decrease of (29±1)% in the track diameter of a 3.0 MeV proton. The reduced track diameters were found to be predominantly caused by a comparable reduction in the bulk etch rate of the CR-39 with x-ray dose. A residual effect, due to changes in track etch rate and dependent on incident particle energy, was characterized by an empirical formula. by Jimmy A. Rojas. S.B. 2017-01-30T19:17:33Z 2017-01-30T19:17:33Z 2015 2016 Thesis http://hdl.handle.net/1721.1/106770 969780029 eng MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission. http://dspace.mit.edu/handle/1721.1/7582 47 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Nuclear Science and Engineering. Rojas, Jimmy A. (Rojas Herrera) Impact of x-ray dose on the response of CR-39 nuclear track detector to 1-5.5 MeV alphas and 0.5-9.1 MeV protons for spectroscopy at the OMEGA Laser Facility and the National Ignition Facility |
| title | Impact of x-ray dose on the response of CR-39 nuclear track detector to 1-5.5 MeV alphas and 0.5-9.1 MeV protons for spectroscopy at the OMEGA Laser Facility and the National Ignition Facility |
| title_full | Impact of x-ray dose on the response of CR-39 nuclear track detector to 1-5.5 MeV alphas and 0.5-9.1 MeV protons for spectroscopy at the OMEGA Laser Facility and the National Ignition Facility |
| title_fullStr | Impact of x-ray dose on the response of CR-39 nuclear track detector to 1-5.5 MeV alphas and 0.5-9.1 MeV protons for spectroscopy at the OMEGA Laser Facility and the National Ignition Facility |
| title_full_unstemmed | Impact of x-ray dose on the response of CR-39 nuclear track detector to 1-5.5 MeV alphas and 0.5-9.1 MeV protons for spectroscopy at the OMEGA Laser Facility and the National Ignition Facility |
| title_short | Impact of x-ray dose on the response of CR-39 nuclear track detector to 1-5.5 MeV alphas and 0.5-9.1 MeV protons for spectroscopy at the OMEGA Laser Facility and the National Ignition Facility |
| title_sort | impact of x ray dose on the response of cr 39 nuclear track detector to 1 5 5 mev alphas and 0 5 9 1 mev protons for spectroscopy at the omega laser facility and the national ignition facility |
| topic | Nuclear Science and Engineering. |
| url | http://hdl.handle.net/1721.1/106770 |
| work_keys_str_mv | AT rojasjimmyarojasherrera impactofxraydoseontheresponseofcr39nucleartrackdetectorto155mevalphasand0591mevprotonsforspectroscopyattheomegalaserfacilityandthenationalignitionfacility |