Definition of the Linear Region of X-Ray Induced Cable Response.
Topical rept. Jan-Apr 77,
TRW DEFENSE AND SPACE SYSTEMS GROUP REDONDO BEACH CALIF
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Cable response due to X-irradiation is linear with incident fluence provided the deposited charge in cable dielectrics is directly proportional to the X-ray flux. In order to estimate the level at which the linear region ends, we discuss three nonlinear processes which modify the deposited charge profile in a hypothetical cable model field limiting in vacuum gaps, ionization effects in air gaps, and radiation-induced dielectric conductivity. The exact level, at which limiting of the Norton driver in an elemental length of cable begins, depends on the cable geometry and the X-ray source. Estimates of the onset of nonlinearities due to field limiting and to dielectric conductivity are found in terms of cable and source parameters. With air-filled gaps the Norton driver is always nonlinear. In addition to limiting of the Norton drivers, the load response of a long cable may be limited due to attenuation of propagating currents in the induced conductivity of the bulk of the dielectric. Author
- Electrical and Electronic Equipment
- Electricity and Magnetism
- Nuclear Physics and Elementary Particle Physics