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Title: Physics design of the DARHT 2nd axis accelerator cell

Abstract

The next generation of radiographic machines based on induction accelerators require very high brightness electron beams to realize the desired x-ray spot size and intensity. This high brightness must be maintained throughout the beam transport, from source to x-ray converter target. The accelerator for the second-axis of the Dual Axis Radiographic Hydrodynamic Test (DARHT) facility is being designed to accelerate a 4-kA, 2-{micro}s pulse of electrons to 20 MeV. After acceleration, the 2-{micro}s pulse will be chopped into a train of four 50-ns pulses with variable temporal spacing by rapidly deflecting the beam between a beam stop and the final transport section. The short beam pulses will be focused onto an x-ray converter target generating four radiographic pulses within the 2-{micro}s window. Beam instability due to interaction with the accelerator cells can very adversely effect the beam brightness and radiographic pulse quality. This paper describes the various issues considered in the design of the accelerator cell with emphasis on transverse impedance and minimizing beam instabilities.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (US)
Sponsoring Org.:
USDOE Office of Defense Programs (DP) (US)
OSTI Identifier:
14717
Report Number(s):
UCRL-JC-130424; 39DP01000
39DP01000; TRN: US0106226
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 19th International LINAC Conference, LINAC '98, Chicago, IL (US), 08/23/1998--08/28/1998; Other Information: PBD: 19 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; TEST FACILITIES; BEAM TRANSPORT; BRIGHTNESS; DESIGN; ELECTRON BEAMS; HYDRODYNAMICS; LINEAR ACCELERATORS; BEAM DYNAMICS; ACCELERATOR FACILITIES

Citation Formats

Chen, Y J, Houck, T L, Reginato, L J, Shang, C C, and Yu, S S. Physics design of the DARHT 2nd axis accelerator cell. United States: N. p., 1999. Web.
Chen, Y J, Houck, T L, Reginato, L J, Shang, C C, & Yu, S S. Physics design of the DARHT 2nd axis accelerator cell. United States.
Chen, Y J, Houck, T L, Reginato, L J, Shang, C C, and Yu, S S. Thu . "Physics design of the DARHT 2nd axis accelerator cell". United States. https://www.osti.gov/servlets/purl/14717.
@article{osti_14717,
title = {Physics design of the DARHT 2nd axis accelerator cell},
author = {Chen, Y J and Houck, T L and Reginato, L J and Shang, C C and Yu, S S},
abstractNote = {The next generation of radiographic machines based on induction accelerators require very high brightness electron beams to realize the desired x-ray spot size and intensity. This high brightness must be maintained throughout the beam transport, from source to x-ray converter target. The accelerator for the second-axis of the Dual Axis Radiographic Hydrodynamic Test (DARHT) facility is being designed to accelerate a 4-kA, 2-{micro}s pulse of electrons to 20 MeV. After acceleration, the 2-{micro}s pulse will be chopped into a train of four 50-ns pulses with variable temporal spacing by rapidly deflecting the beam between a beam stop and the final transport section. The short beam pulses will be focused onto an x-ray converter target generating four radiographic pulses within the 2-{micro}s window. Beam instability due to interaction with the accelerator cells can very adversely effect the beam brightness and radiographic pulse quality. This paper describes the various issues considered in the design of the accelerator cell with emphasis on transverse impedance and minimizing beam instabilities.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {8}
}

Conference:
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