Experiments investigating the generation and transport of 10-12 MeV, 30-kA, mm-size electron beams with linear inductive voltage adders

Author

Mazarakis, M.G. ; Poukey, J.W. ; Maenchen, J.E. ; Rovang, D.C. ; Menge, P.R. ; Lash, J.S. ; Smith, D.L. ; Halbleib, J.A. ; Cordova, S.R. ; Mikkelson, K. ; Gustwiller, J. ; Stygar, W.A. ; Welch, D.R. ; Smith, I. ; Corcoran, P.

Author_Institution

Sandia Nat. Labs., Albuquerque, NM, USA

Volume

1

fYear

1997

fDate

12-16 May 1997

Firstpage

1245

Abstract

We present the design, analysis, and results of the high-brightness electron beam experiments currently under investigation at Sandia National Laboratories. The anticipated beam parameters are the following: energy 8-12 MeV, current 35-50 kA, rms radius 0.5 mm, and pulse duration 30-60 ns FWHM. The accelerators utilized are SABRE and HERMES III. Both are linear inductive voltage adders (IVA) modified to higher impedance and fitted with magnetically immersed foilless electron diodes. In the strong 20-50 Tesla solenoidal magnetic field of the diode, mm-size electron beams are generated and propagated to a beam stop. The electron beam is field emitted from mm-diameter needle-shaped cathode electrode and is contained in a similar size envelope by the strong magnetic field. These extremely space charge dominated beams provide the opportunity to study beam dynamics and possible instabilities in a unique parameter space. The SABRE experiments are already completed and have produced 30-kA, 1.5-2.5 FWHM electron beams, while the HERMES-III experiments are currently under way

Keywords

electron accelerators; linear accelerators; particle beam dynamics; particle beam stability; 12 MeV; 20 to 50 T; 30 kA; SABRE experiments; electron beams; high-brightness electron beam experiments; linear inductive voltage adders; magnetically immersed foilless electron diodes; needle-shaped cathode electrode; pulse duration; Cathodes; Diodes; Electrodes; Electron beams; Impedance; Laboratories; Linear particle accelerator; Particle accelerators; Voltage; X-ray imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1997. Proceedings of the 1997

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-4376-X

Type

conf

DOI

10.1109/PAC.1997.749988

Filename

749988