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Title: Observation of Enhanced Transformer Ratio in Collinear Wakefield Acceleration

Abstract

One approach to future high energy particle accelerators is based on the wakefield principle: a leading high-charge drive bunch is used to excite fields in an accelerating structure or plasma that in turn accelerates a trailing low-charge witness bunch. The transformer ratio R is defined as the ratio of the maximum energy gain of the witness bunch to the maximum energy loss of the drive bunch. In general, R<2 for this configuration. A number of techniques have been proposed to overcome the transformer ratio limitation. We report here the first experimental study of the ramped bunch train (RBT) technique in a dielectric based accelerating structure. A single drive bunch was replaced by two bunches with charge ratio of 1 ratio 2.5 and a separation of 10.5 wavelengths of the fundamental mode. An average measured transformer ratio enhancement by a factor of 1.31 over the single drive bunch case was obtained.

Authors:
; ;  [1]; ; ; ;  [2]
  1. Euclid Techlabs LLC, Solon, Ohio 44139 (United States)
  2. High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois-60439 (United States)
Publication Date:
OSTI Identifier:
20951211
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 14; Other Information: DOI: 10.1103/PhysRevLett.98.144801; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCELERATION; DIELECTRIC MATERIALS; ENERGY LOSSES; MINUS-PLUS RATIO; PLASMA; TRANSFORMERS; WAKEFIELD ACCELERATORS; WAVELENGTHS

Citation Formats

Jing, C., Kanareykin, A., Schoessow, P., Power, J. G., Conde, M., Yusof, Z., and Gai, W.. Observation of Enhanced Transformer Ratio in Collinear Wakefield Acceleration. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.144801.
Jing, C., Kanareykin, A., Schoessow, P., Power, J. G., Conde, M., Yusof, Z., & Gai, W.. Observation of Enhanced Transformer Ratio in Collinear Wakefield Acceleration. United States. doi:10.1103/PHYSREVLETT.98.144801.
Jing, C., Kanareykin, A., Schoessow, P., Power, J. G., Conde, M., Yusof, Z., and Gai, W.. Fri . "Observation of Enhanced Transformer Ratio in Collinear Wakefield Acceleration". United States. doi:10.1103/PHYSREVLETT.98.144801.
@article{osti_20951211,
title = {Observation of Enhanced Transformer Ratio in Collinear Wakefield Acceleration},
author = {Jing, C. and Kanareykin, A. and Schoessow, P. and Power, J. G. and Conde, M. and Yusof, Z. and Gai, W.},
abstractNote = {One approach to future high energy particle accelerators is based on the wakefield principle: a leading high-charge drive bunch is used to excite fields in an accelerating structure or plasma that in turn accelerates a trailing low-charge witness bunch. The transformer ratio R is defined as the ratio of the maximum energy gain of the witness bunch to the maximum energy loss of the drive bunch. In general, R<2 for this configuration. A number of techniques have been proposed to overcome the transformer ratio limitation. We report here the first experimental study of the ramped bunch train (RBT) technique in a dielectric based accelerating structure. A single drive bunch was replaced by two bunches with charge ratio of 1 ratio 2.5 and a separation of 10.5 wavelengths of the fundamental mode. An average measured transformer ratio enhancement by a factor of 1.31 over the single drive bunch case was obtained.},
doi = {10.1103/PHYSREVLETT.98.144801},
journal = {Physical Review Letters},
number = 14,
volume = 98,
place = {United States},
year = {Fri Apr 06 00:00:00 EDT 2007},
month = {Fri Apr 06 00:00:00 EDT 2007}
}