Title :
Beam injection and transport experiments with an upgraded injector in the UNM betatron
Author :
Siergiej, D.M. ; Schamiloglu, E. ; Terry, R.L. ; Humphries, S., Jr.
Author_Institution :
Dept. of Electr. & Comput. Eng., New Mexico Univ., Albuquerque, NM, USA
Abstract :
Summary Form only given, as follows. A study of the injection and transport of a high-power relativistic electron beam (130 A, 300 keV) in the UNM betatron was recently concluded. The electron beam was injected at an angle of 20 degrees with respect to the main axis of the accelerating ring. An electron beam current of 15 A was transported around the entire accelerating ring. The experiments verified that a transverse electric field can be used to bend an externally injected relativistic electron beam onto the main axis of the accelerating ring and that the injected beam can be transported in a periodic solenoidal lens array. The beam injection results were consistent with calculations of the single-particle orbits under the combined influence of a transverse electric field and a strong focusing magnetic field, as were used in the experiment. A large fraction of the electron beam current was lost during injection and transport. This is attributed to a large spread in beam energies that was caused by a nonuniform injector voltage pulse. In order to remedy this difficulty, the Marx generator is being upgraded to 600 kV and a novel crowbar system is being installed.<>
Keywords :
beam handling techniques; betatrons; electron accelerators; 300 keV; Marx generator; UNM betatron; accelerating ring; crowbar system; electron beam current; high-power relativistic electron beam; injected beam; periodic solenoidal lens array; strong focusing magnetic field; transport experiments; transported; transverse electric field; upgraded injector; Betatrons; Electron accelerators; Particle beam handling;
Conference_Titel :
Plasma Science, 1989. IEEE Conference Record - Abstracts., 1989 IEEE International Conference on
Conference_Location :
Buffalo, NY, USA
DOI :
10.1109/PLASMA.1989.166011