Masters Theses

Abstract

"A homogeneous, variable plate separation ion chamber consisting of a polyethylene body and employing flowing ethylene as the cavity gas has been designed and tested for the specification soft x-ray (<75kV) energy deposition in typical hydrocarbons. The variable plate separation feature provided primary data on the differential specific ionization originating within the cavity gas occupying the effective collector volume which is independent of inherent chamber inhomogeneities associated with the electrically conducting films comprizing the chamber electrodes. These data demonstrated that charged particle equilibrium is established within the first few ten thousandths of an inch in typical solid hydrocarbons irradiated with this class of sources. Comparison of this type of chamber with a fixed plate separation, static cavity gas mode of operation showed that the latter may predict dose rates with inherent errors exceeding 100%. With the quality of electronic readout accessories presently available, the variable plate separation chamber yielded dose rate data exhibiting a probable error of 3.8 percent (plus the unknown uncertainty in the literature data on the energy required to form an ion pair), and an ultimate limiting error of less than 2 percent appears feasible"--Abstract, page ii.

Advisor(s)

Hill, Otto H.

Committee Member(s)

Faucett, T. R.
Rivers, Jack L.
Edwards, D. R.

Department(s)

Physics

Degree Name

M.S. in Physics

Sponsor(s)

University of Missouri. Space Sciences Research Center

Publisher

University of Missouri at Rolla

Publication Date

1966

Pagination

vi, 59 pages

Note about bibliography

Includes bibliographical references (page 58).

Rights

© 1966 H. Sajon Joyner, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Radiation chemistryRadiation dosimetry

Thesis Number

T 1967

Print OCLC #

5980259

Electronic OCLC #

907298004

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