Author:
Harper-Slaboszewicz V. J.,Fowler W. E.
Abstract
The increase in time-integrated divergence of a 1.7-MeV, 10-MA relativistic electron beam due to transport over 10 cm in a gas cell filled with 1 and 6 Torr of nitrogen was measured. The divergence was characterized by a multiple-pinhole beam sampling technique involving an aperture plate, an expansion region, and an attenuator plate followed by nylon radiochromic film. The divergence is determined by a fit of the measured deposition profile to response functions calculated using Monte Carlo coupled electronphoton transport codes. The initial value of 6.9° after the entrance foil is observed to increase to 12°. The errors in the measurement are quantified with Monte Carlo techniques. The response function fit gives a significantly better estimate of the divergence than a Gaussian fit.
Subject
Electrical and Electronic Engineering,Condensed Matter Physics,Atomic and Molecular Physics, and Optics
Reference13 articles.
1. Plasma Instabilities in High‐Current Field‐Emission Diodes
2. Plasma‐induced field emission and the characteristics of high‐current relativistic electron flow
3. McClenahan C. R. 1985 Sandia National Laboratories Report No. SAND85–0740C.
4. Kelly J. G. & Vandevender W. H. 1976 Sandia National Laboratories Report No. SAND75–0399.
5. Kelly J. G. & Schuch R. L. 1976 Sandia National Laboratories Report No. SAND75–0668.