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Title: Corkscrew Motion of an Electron Beam due to Coherent Variations in Accelerating Potentials

Corkscrew motion results from the interaction of fluctuations of beam electron energy with accidental magnetic dipoles caused by misalignment of the beam transport solenoids. Corkscrew is a serious concern for high-current linear induction accelerators (LIA). A simple scaling law for corkscrew amplitude derived from a theory based on a constant-energy beam coasting through a uniform magnetic field has often been used to assess LIA vulnerability to this effect. We use a beam dynamics code to verify that this scaling also holds for an accelerated beam in a non-uniform magnetic field, as in a real accelerator. Results of simulations with this code are strikingly similar to measurements on one of the LIAs at Los Alamos National Laboratory.
Authors:
 [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
OSTI Identifier:
1324545
Report Number(s):
LA-UR--16-26989
TRN: US1700056
DOE Contract Number:
AC52-06NA25396
Resource Type:
Technical Report
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; INDUCTION; INTERACTIONS; SIMULATION; ELECTRON BEAMS; FLUCTUATIONS; SCALING LAWS; LANL; SOLENOIDS; BEAM DYNAMICS; MAGNETIC DIPOLES; MAGNETIC FIELDS; ACCELERATORS; ELECTRIC POTENTIAL; BEAM BENDING MAGNETS; AMPLITUDES; KILO AMP BEAM CURRENTS; L CODES; linear induction accelerators; electron beam dynamics; electron beam stability