TY - JOUR
T1 - Electron beam modulation using a laser-driven photocathode
AU - Neumann, J. G.
AU - O'Shea, P. G.
AU - Demske, D.
AU - Graves, W. S.
AU - Sheehy, B.
AU - Loos, H.
AU - Carr, G. L.
N1 - Funding Information:
This work was carried out with the support of the US Department of Energy, Division of Materials Sciences and Division of Chemical Sciences, under Contract No. DE-AC02-98CH10886.
PY - 2003/7/11
Y1 - 2003/7/11
N2 - 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.
AB - 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.
KW - Electron beam modulation
KW - Free-electron devices
KW - Prebunching
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U2 - 10.1016/S0168-9002(03)00904-5
DO - 10.1016/S0168-9002(03)00904-5
M3 - Conference article
AN - SCOPUS:0042672594
VL - 507
SP - 498
EP - 501
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
IS - 1-2
T2 - Proceedings of the 24th International Free Electron Laser Conference
Y2 - 9 September 2002 through 13 September 2002
ER -