OPERATION, MAINTENANCE AND DOSIMETRY ONTHE AFCRL LINEAR ACCELERATOR, AND RADIATION EFFECTS ON SILICON AND INSULATORS.
Final rept., 15 Jun 65-15 Aug 66,
CONTROLS FOR RADIATION INC CAMBRIDGE MASS
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The operation, maintenance, modifications and addition of instrumentation to the AFCRL linear accelerator during the contract period are discussed. Preliminary work on the dosimetry of the linac electron beam and x-rays is described. A National Bureau of Standards P-2 chamber, a Victoreen r-meter in a lucite equilibrium shell, and a prototype carbon calorimeter were tested for the x-ray dosimetry. The trapping of electrons in an insulator is calculated both during and after a radiation pulse. It is found that for very high and narrow radiation pulses the number of trapped electrons is proportional to the logarithm of the total dose while for low-wide radiation pulses the number of trapped electrons is proportional to the total dose. A simple expression is derived for the conductivity produced in an insulator because of the trapping of electrons. This conductivity decays with the time constant for emission of electrons from the traps. Author
- Particle Accelerators
- Solid State Physics