• Open Access

Spatial control of photoemitted electron beams using a microlens-array transverse-shaping technique

A. Halavanau, G. Qiang, G. Ha, E. Wisniewski, P. Piot, J. G. Power, and W. Gai
Phys. Rev. Accel. Beams 20, 103404 – Published 26 October 2017

Abstract

A transversely inhomogeneous laser distribution on the photocathode surface generally produces electron beams with degraded beam quality. In this paper, we explore the use of microlens arrays to dramatically improve the transverse uniformity of an ultraviolet drive-laser pulse used in a photoinjector. We also demonstrate a capability of microlens arrays to generate transversely modulated electron beams and present an application of such a feature to diagnose the properties of a magnetized beam.

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  • Received 24 July 2017

DOI:https://doi.org/10.1103/PhysRevAccelBeams.20.103404

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Accelerators & Beams

Authors & Affiliations

A. Halavanau1,2, G. Qiang3,4, G. Ha5, E. Wisniewski3, P. Piot1,2, J. G. Power3, and W. Gai3

  • 1Department of Physics and Northern Illinois Center for Accelerator & Detector Development, Northern Illinois University, DeKalb, Illinois 60115, USA
  • 2Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
  • 3Argonne Wakefield Accelerator, Argonne National Laboratory, Lemont, Illinois 60439, USA
  • 4Department of Engineering Physics, Tsinghua University, Beijing 100084, China
  • 5POSTECH, Pohang, Kyoungbuk, 37673, Korea

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Vol. 20, Iss. 10 — October 2017

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