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Title: Analysis of a Symmetric Terahertz Dielectric-Lined Rectangular Structure for High Gradient Acceleration

We study, using computational methods based on analytic theory as well as a PIC code, the wakefields set up in a seven-zone symmetric rectangular THZ structure, and find that for overall transverse x/y dimensions 2.121 mmx0.6 mm, two 5-GeV drive bunches (3 nC, with x/y/z dimensions 0.3/0.3/0.12 mm{sup 3} as available at SLAC) will set up an axial wakefield {approx}350 MV/m in the witness channel, with a transformer ratio {approx}18-20. The symmetry of the structure ensures not only that small transverse forces are imposed on the witness bunch, but also that the two components of transverse force are equal and opposite at the bunch location so as to enable dynamical stabilization in an accelerator comprising many modules. Transverse forces on the drive bunch tails may allow bunches to move {approx}0.5-1 m without suffering excessive erosion.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [4] ;  [2]
  1. Columbia University, New York, New York (United States)
  2. (United States)
  3. NSC Kharkov Institute of Physics and Technology, Kharkov (Ukraine)
  4. Yale University, New Haven, Connecticut (United States)
Publication Date:
OSTI Identifier:
21255258
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1086; Journal Issue: 1; Conference: 13. advanced accelerator concepts workshop, Santa Cruz, CA (United States), 27 Jul - 2 Aug 2008; Other Information: DOI: 10.1063/1.3080944; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATION; DIELECTRIC MATERIALS; EROSION; GEV RANGE 01-10; STABILIZATION; STANFORD LINEAR ACCELERATOR CENTER; SYMMETRY; TRANSFORMERS; WAKEFIELD ACCELERATORS; WAVEGUIDES