rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Monte Carlo simulations of solid walled proportional counters with different site size for HZE radiation
  name:
    name part: Wang, Xudong.
    role:
      role term: creator
  name:
    name part: Braby, Leslie A.
    role:
      role term: thesis advisor.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2010
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: electronic
    form: remote
    extent: 1 online resource.
  abstract: Characterizing high z high energy (HZE) particles in cosmic radiation is of importance for the study of the equivalent dose to astronauts. Low pressure, tissue equivalent proportional counters (TEPC) are routinely used to evaluate radiation exposures in space. A multiple detector system composed of three TEPC of different sizes was simulated using the Monte-Carlo software toolkit GEANT4. The ability of the set of detectors to characterize HZE particles, as well as measure dose, was studied. HZE particles produce energetic secondary electrons ([delta]-rays) which carry a significant fraction of energy lost by the primary ion away from its track. The range and frequency of these delta rays depends on the velocity and charge of the primary ion. Measurements of lineal energy spectra in different size sites will differ because of these delta ray events and may provide information to characterize the incident primary particle. Monte Carlo calculations were accomplished, using GEANT4, simulating solid walled proportional detectors with unit density site diameter of 0.1, 0.5 and 2.5 [microns] in a uniform HZE particle field. The simulated spherical detectors have 2 mm thick tissue equivalent walls. The uniform beams of 1 GeV/n, 500 MeV/n and 100 MeV/n 56Fe, 28Si, 16O, 4He and proton particles were used to bombard the detector. The size effect of such a detector system was analyzed with the calculation results. The results show that the y vs. yf(y) spectrum differs significantly as a function of site size. From the spectra, as well as the calculated mean lineal energy, the simulated particles can be characterized. We predict that the detector system is capable of characterizing HZE particles in a complex field. This suggests that it may be practical to use such a system to measure the average particle velocity as well as the absorbed dose delivered by HZE particles in space. The parameters used in the simulation are also good references for detector construction.
  note: by Xudong Wang.
  note: "Major Subject: Health Physics"
  note: Title from author supplied metadata (automated record created 2010-03-12 12:08:51).
  note: Electronic resource.
  note: Master of Science Texas A&M University 2006 http://hdl.handle.net/1969.1/ETD-TAMU-1135
  note: Includes bibliographical references.
  note: Text (Thesis)
  subject:
    topic: Major Health Physics
  subject:
    topic: Monte Carlo
  subject:
    topic: Tissue equivalent proportional counter
  subject:
    topic: size effect
  subject:
    topic: cosmic radiation
  subject:
    topic: HZE particle
  identifier: http://hdl.handle.net/1969.1/ETD-TAMU-1135
  record info:
    record content source: TXA
    record creation date: 100428
    record change date: 20151201150147.0
    record identifier: in00002581133