Physics design of the DARHT 2nd axis accelerator cell

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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 ... continued below

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129 Kilobytes pages

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Chen, Y. J.; Houck, T. L.; Reginato, L. J.; Shang, C. C. & Yu, S. S. August 19, 1999.

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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.

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129 Kilobytes pages

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  • 19th International LINAC Conference, LINAC '98, Chicago, IL (US), 08/23/1998--08/28/1998

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  • Report No.: UCRL-JC-130424
  • Report No.: 39DP01000
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 14717
  • Archival Resource Key: ark:/67531/metadc620096

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  • August 19, 1999

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • May 6, 2016, 1:50 p.m.

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Chen, Y. J.; Houck, T. L.; Reginato, L. J.; Shang, C. C. & Yu, S. S. Physics design of the DARHT 2nd axis accelerator cell, article, August 19, 1999; California. (digital.library.unt.edu/ark:/67531/metadc620096/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.