Electron beam modulation using a laser-driven photocathode

J. G. Neumann, P. G. O'Shea, D. Demske, William Graves, B. Sheehy, H. Loos, G. L. Carr

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Coherent synchrotron radiation may lead to a microwave instability on an electron bunch at wavelengths much smaller than the bunch length. It is possible that ripples (prebunching) on the electron bunch distribution may seed this instability. We report on research exploring this effect using a longitudinally modulated drive laser to generate a modulated electron beam. Our first step is to develop simulations that will help us study the beam generation process using PARMELA. Preliminary experiments on laser beam and electron beam modulation, conducted at the Source Development Laboratory at the National Synchrotron Light Source, show modulation at frequencies in the terahertz regime is attainable. Longitudinal prebunching may enhance the performance of FEL or other radiative devices in the terahertz regime. Alternatively, longitudinal control over the electron beam might be an effective method of suppressing coherent synchrotron radiation instabilities that cause beam break-up.

Original languageEnglish (US)
Pages (from-to)498-501
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume507
Issue number1-2
DOIs
StatePublished - Jul 11 2003
Externally publishedYes

Fingerprint

Photocathodes
photocathodes
Electron beams
Modulation
electron beams
Synchrotron radiation
modulation
Lasers
synchrotron radiation
longitudinal control
Longitudinal control
lasers
Electrons
Free electron lasers
electron distribution
Synchrotrons
ripples
Laser beams
Light sources
Seed

Keywords

  • Electron beam modulation
  • Free-electron devices
  • Prebunching

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

Electron beam modulation using a laser-driven photocathode. / Neumann, J. G.; O'Shea, P. G.; Demske, D.; Graves, William; Sheehy, B.; Loos, H.; Carr, G. L.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 507, No. 1-2, 11.07.2003, p. 498-501.

Research output: Contribution to journalArticle

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AU - Carr, G. L.

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