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Title: Longitudinal dynamics of twin electron bunches in the Linac Coherent Light Source

The recent development of two-color x-ray free-electron lasers, as well as the successful demonstration of high-gradient witness bunch acceleration in a plasma, have generated strong interest in electron bunch trains, where two or more electron bunches are generated, accelerated and compressed in the same accelerating bucket. In this paper we give a detailed analysis of a twin-bunch technique in a high-energy linac. This method allows the generation of two electron bunches with high peak current and independent control of time delay and energy separation. We find that the wakefields in the accelerator structures play an important role in the twin-bunch compression, and through analysis show that they can be used to extend the available time delay range. As a result, based on the theoretical model and simulations we propose several methods to achieve larger time delay.
Authors:
 [1] ;  [2] ;  [2] ;  [2]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); Tsinghua Univ., Beijing (China)
  2. SLAC National Accelerator Laboratory, Menlo Park, CA (United States)
Publication Date:
OSTI Identifier:
1181464
Report Number(s):
SLAC-PUB-16196
Journal ID: ISSN 1098-4402; PRABFM
Grant/Contract Number:
AC02-76SF00515
Type:
Published Article
Journal Name:
Physical Review Special Topics. Accelerators and Beams
Additional Journal Information:
Journal Volume: 18; Journal Issue: 3; Journal ID: ISSN 1098-4402
Publisher:
American Physical Society (APS)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCPHY; XFEL