Danny W Dotson

US Patent:

7279882, Oct 9, 2007

Filed:

Oct 4, 2004

Appl. No.:

10/957763

Inventors:

Pavel V. Degtiarenko - Williamsburg VA, US
Danny Wayne Dotson - Gloucester VA, US

Assignee:

Jefferson Science Associates, LLC - Newport News VA

International Classification:

G01N 27/00
A61N 5/00
H01J 3/14

US Classification:

324 713, 2504923, 250397

Abstract:

A beam position detector for measuring the properties of a charged particle beam, including the beam's position, size, shape, and intensity. One or more absorbers are constructed of thermo-resistive material and positioned to intercept and absorb a portion of the incoming beam power, thereby causing local heating of each absorber. The local temperature increase distribution across the absorber, or the distribution between different absorbers, will depend on the intensity, size, and position of the beam. The absorbers are constructed of a material having a strong dependence of electrical resistivity on temperature. The beam position detector has no moving parts in the vicinity of the beam and is especially suited to beam areas having high ionizing radiation dose rates or poor beam quality, including beams dispersed in the transverse direction and in their time radio frequency structure.