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Title: Generation of ellipsoidal beam through 3D pulse shaping for a photoinjector drive laser.

Abstract

Due to the linear space-charge force, an ellipsoidal beam is expected to have much smaller emittance in comparison with beams of other geometries, which is critical for many accelerator applications. Up to now, no practical way of generating such beams is available. In this paper we present a few schemes for 3-D laser pulse shaping that can be used to generate ellipsoidal laser pulses that in turn can be applied for generating ellipsoidal electron bunches from a photoinjector. Our simulations show that 3D laser pulse shaping can be realized through laser phase tailoring in combination with properly designed refractive and diffractive optics. Performance of an electron beam generated from such shaped laser pulses is compared with that of the ideal flat-topped and Gaussian electron bunches by numerical simulation, showing improvement in both beam dynamics and performance.

Authors:
; ;  [1];
  1. (APS)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
973466
Report Number(s):
ANL/ASD/CP-119179
TRN: US1001818
DOE Contract Number:
DE-AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Conference: 2006 Linear Accelerator Conference (LINAC 06); Aug. 21, 2006 - Aug. 25, 2006; Knoxville, TN
Country of Publication:
United States
Language:
ENGLISH
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; BEAM DYNAMICS; ELECTRON BEAMS; ELECTRONS; LASERS; LINEAR ACCELERATORS; OPTICS; PERFORMANCE; SIMULATION; SPACE CHARGE

Citation Formats

Li, Y., Chang, X., Accelerator Systems Division, and BNL. Generation of ellipsoidal beam through 3D pulse shaping for a photoinjector drive laser.. United States: N. p., 2006. Web.
Li, Y., Chang, X., Accelerator Systems Division, & BNL. Generation of ellipsoidal beam through 3D pulse shaping for a photoinjector drive laser.. United States.
Li, Y., Chang, X., Accelerator Systems Division, and BNL. Sun . "Generation of ellipsoidal beam through 3D pulse shaping for a photoinjector drive laser.". United States. doi:.
@article{osti_973466,
title = {Generation of ellipsoidal beam through 3D pulse shaping for a photoinjector drive laser.},
author = {Li, Y. and Chang, X. and Accelerator Systems Division and BNL},
abstractNote = {Due to the linear space-charge force, an ellipsoidal beam is expected to have much smaller emittance in comparison with beams of other geometries, which is critical for many accelerator applications. Up to now, no practical way of generating such beams is available. In this paper we present a few schemes for 3-D laser pulse shaping that can be used to generate ellipsoidal laser pulses that in turn can be applied for generating ellipsoidal electron bunches from a photoinjector. Our simulations show that 3D laser pulse shaping can be realized through laser phase tailoring in combination with properly designed refractive and diffractive optics. Performance of an electron beam generated from such shaped laser pulses is compared with that of the ideal flat-topped and Gaussian electron bunches by numerical simulation, showing improvement in both beam dynamics and performance.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}

Conference:
Other availability
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  • In this paper we present a three-dimensional (3-D) laser pulse shaping scheme that can be applied for generating ellipsoidal electron bunches from a photoinjector. The 3-D shaping is realized through laser phase tailoring in combination with chromatic aberration in a focusing optics. Performance of an electron beam generated from such shaped laser pulses is compared with that of a uniforma ellipsoidal, a uniform cylindrical, and a Gaussian electron beam. PARMELA simulation shows the advantage of this shaped beam in both transverse and longitudinal performances.
  • No abstract prepared.
  • A generic 3D laser-pulse-shaping scheme is proposed towards the generation of a uniform ellipsoidal particle distribution, an ideal distribution due to the linear dependence of the space-charge force on the particle position. The shaping is accomplished via spatiotemporal coupling of the laser dynamics via chromatic aberration in an optical lens. Particle tracking simulations show that the electron beam initiated by such a laser pulse in a high-gradient radio-frequency photoinjector delivers very low emittance, ideal for beam-based light sources such as the x-ray free-electron laser.
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