Beam profile monitors provide position and
ux distribution information to facilitate the
configuration of an experimental apparatus and are an important component of any accelerator
facilities beam diagnostic system. Nuclear physics experiments typically involve the
incidence of high energy particles or gamma-rays on some target material and the detection
of the products of the ensuing interactions. Therefore, knowing the profile of the incident
radiation beam is desirable. To address the need for a profile monitor for the High-Intensity
Gamma-Ray Source, development of a CCD-based gamma-ray beam profiler was undertaken.
The profiler consisted of plastic scintillator, a lens system and a Starlight Express MX5
CCD camera, all contained within a light tight box. The scintillation pattern, created by
the interaction between the incident gamma-rays and the scintillator, could be focused onto
the CCD. Simulations were used to determine the amount of power that would be absorbed
for different beam energies and scintillator thicknesses. The use of a converter material,
placed directly against the scintillator to improve power deposition, was also investigated.
The system was tested in order to and the camera noise characteristics, the optical resolution
and magnification and the systems responsivity to power absorption in the scintillator.
Using a 137Cs source, preliminary beam proles were obtained. By combining the results of
the testing and simulation, predictions of the required length of exposure were made. It was
determined that a beam with a flux of 10^6/s and a diameter of 2.5 cm could be profiled,
using 6.0 mm of plastic scintillator and 0.6 mm of iron converter, to within 5% error per
0.64 mm x 0.91 mm resolving unit, in less than 1 minute.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:SSU.etd-10282003-163528 |
| Date | 29 October 2003 |
| Creators | Regier, Thomas Zachary |
| Contributors | Kolb, Norman R., Igarashi, Ru |
| Publisher | University of Saskatchewan |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://library.usask.ca/theses/available/etd-10282003-163528/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University of Saskatchewan or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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