DocumentCode :
2687169
Title :
Transport of relativistic electron beams along wire arrays
Author :
Richardson, R.A. ; Denavit, J. ; Rambo, P.W.
fYear :
1990
fDate :
21-23 May 1990
Firstpage :
216
Abstract :
Summary form only given, as follows. Theoretical predications and particle simulations have been tested which indicate that an array of longitudinal wires provides charge and current neutralization of a relativistic electron beam. This allows beam propagation above the drift tube limit without requiring an external magnetic field. A 60 ns, 17-kA pulse of 1.4-MeV electrons was injected into an array of 1-m-long wires with a 1-cm spacing, filling a hexagon 15 cm across. Arrays were tested with stainless steel and copper wires with diameters of 3 and 1.6 mil. Also tested were arrays with wires terminating on an insulated, segmented beam dump. The data show good transport (up to 90%) of the injected current. These results contrast with earlier experiments using 12-mil wires in which transport was cut off after the initial 10 ns. The arrays constructed with insulated beam dumps showed better transported beam profiles, with less beam pinching, than the other arrays. Particle simulations correlate well with these experiments and provide an understanding of the effect of scattering by wires on transport and beam quality. Microwave generation was also observed (≈0.5 W/cm2 between 5 and 20 GHz)
Keywords :
electron beams; microwave generation; relativistic electron beam tubes; 1 cm; 1 m; 1.4 MeV; 15 cm; 17 kA; 5 to 20 GHz; 60 ns; Cu wires; beam propagation; drift tube; insulated segmented beam dump; less beam pinching; longitudinal wires; microwave generation; particle simulations; relativistic electron beams; stainless steel wires; wire arrays;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Plasma Science, 1990. IEEE Conference Record - Abstracts., 1990 IEEE International Conference on
Conference_Location :
Oakland, CA, USA
Type :
conf
DOI :
10.1109/PLASMA.1990.110862
Filename :
5726132
Link To Document :
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