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Title: Generation of Electron Bunches at Low Repetition Rates Using a Beat-Frequency Technique

Abstract

Even at a continuous wave facility such as CEBAF at Jefferson Lab, an electron beam with long time intervals (tens of ns) between individual bunches can be useful, for example to isolate sources of background via time of flight detection or to measure the energy of neutral particles that cannot be separated with a magnetic field. This paper describes a demonstrated method to quickly and easily deliver bunches with repetition rates of 20 to 100 MHz corresponding to time intervals between 10 to 50 ns (respectively). This is accomplished by changing the ON/OFF frequency of the RF-pulsed drive laser by a small amount (f/f < 20%), resulting in a bunch frequency equal to the beat frequency between the radio frequencies of the drive laser and the photoinjector chopper system.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA
Sponsoring Org.:
USDOE - Office of Energy Research (ER)
OSTI Identifier:
901372
Report Number(s):
JLAB-ACO-07-621; DOE/ER/40150-4249
TRN: US0702576
DOE Contract Number:  
AC05-84ER40150
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys. Rev. ST Accel. Beams; Journal Volume: 10
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; DETECTION; ELECTRON BEAMS; ELECTRONS; LASERS; MAGNETIC FIELDS; NEUTRAL PARTICLES

Citation Formats

Poelker, Matt, Grames, Joseph, Hansknecht, John, Kazimi, Reza, and Musson, John. Generation of Electron Bunches at Low Repetition Rates Using a Beat-Frequency Technique. United States: N. p., 2007. Web. doi:10.1103/PhysRevSTAB.10.053502.
Poelker, Matt, Grames, Joseph, Hansknecht, John, Kazimi, Reza, & Musson, John. Generation of Electron Bunches at Low Repetition Rates Using a Beat-Frequency Technique. United States. doi:10.1103/PhysRevSTAB.10.053502.
Poelker, Matt, Grames, Joseph, Hansknecht, John, Kazimi, Reza, and Musson, John. Tue . "Generation of Electron Bunches at Low Repetition Rates Using a Beat-Frequency Technique". United States. doi:10.1103/PhysRevSTAB.10.053502. https://www.osti.gov/servlets/purl/901372.
@article{osti_901372,
title = {Generation of Electron Bunches at Low Repetition Rates Using a Beat-Frequency Technique},
author = {Poelker, Matt and Grames, Joseph and Hansknecht, John and Kazimi, Reza and Musson, John},
abstractNote = {Even at a continuous wave facility such as CEBAF at Jefferson Lab, an electron beam with long time intervals (tens of ns) between individual bunches can be useful, for example to isolate sources of background via time of flight detection or to measure the energy of neutral particles that cannot be separated with a magnetic field. This paper describes a demonstrated method to quickly and easily deliver bunches with repetition rates of 20 to 100 MHz corresponding to time intervals between 10 to 50 ns (respectively). This is accomplished by changing the ON/OFF frequency of the RF-pulsed drive laser by a small amount (f/f < 20%), resulting in a bunch frequency equal to the beat frequency between the radio frequencies of the drive laser and the photoinjector chopper system.},
doi = {10.1103/PhysRevSTAB.10.053502},
journal = {Phys. Rev. ST Accel. Beams},
number = ,
volume = 10,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}
}