This project was designed to determine the feasibility of constructing a multichamber
proportional counter. A multi-chamber detector is designed to increase the total
surface area which will increase the number of radiation interactions that occur per unit
dose. Surface area can be changed without changing the detector volume by subdividing
the active volume into several smaller volumes that can then be used as mini detectors
whose data can be summed and used to determine the absorbed dose. This will allow the
total surface area to remain the same as that of the more common 12.5 cm (5 in.)
spherical detector and a decreased total volume resulting in a more compact detector
design. However, subdividing those volumes causes problems with electric field fringing
at the ends of the mini detectors. In order to correct this, guard ring and field tube
designs which operate at a lower voltage than the detector cathode were tested. Results
from this study showed that the field tube design provided the best overall resolution but
it only outperformed the other designs by a maximum of 5%. However the field tube
design doubles the length of the detector which would result in a larger overall detector
package. The performance of the single and double ring configurations was suitable for radiation monitoring applications. These findings show that it is feasible to use an array
of subdivided detector volumes instead of a spherical detector.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/3221 |
| Date | 12 April 2006 |
| Creators | Taplin, Temeka |
| Contributors | Braby, Leslie A. |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Thesis, text |
| Format | 935193 bytes, electronic, application/pdf, born digital |
Page generated in 0.0016 seconds