TY - JOUR
T1 - "Diffraction-free" optical beams in inverse free electron laser accelerators
AU - Cai, S. Y.
AU - Bhattacharjee, A.
AU - Marshall, T. C.
N1 - Funding Information:
We thank Prof. I. Herman for drawing our attention to diffraction-free beams, and to Dr. C. Pellegrini and Dr. P. Sprangle for enlightening discussions. This work is supported by ONR contract No . N001479C-0769 and Award No . BNL 27 4067-S from Brookhaven National Laboratory.
PY - 1988/10
Y1 - 1988/10
N2 - "Diffraction-free" optical beams correspond to exact solutions of the wave equation in free space with the remarkable property that they propagate with negligible transverse spreading for distances much larger than the Rayleigh range. The requirement for this to occur is a large aperture. Using a 2D computer code, we find that these optical beams will also propagate with negligible diffraction even when perturbed by the electron beam in an IFEL; indeed they match well the FEL requirement for the accelerator. The numerical simulations are performed for the proposed facility at Brookhaven in which λs = 10 μm, B = 1.5 T (linearly tapered lw = 1.31-6.28 cm) and the optical beam power is either 8 × 1011 W or 2.3 × 1010 W. Approximately 70% of the electrons constituting a beam of current 5 mA or 15 A, radius 0.14 mm and initial energy of 50 MeV is accelerated at 50 MeV/m.
AB - "Diffraction-free" optical beams correspond to exact solutions of the wave equation in free space with the remarkable property that they propagate with negligible transverse spreading for distances much larger than the Rayleigh range. The requirement for this to occur is a large aperture. Using a 2D computer code, we find that these optical beams will also propagate with negligible diffraction even when perturbed by the electron beam in an IFEL; indeed they match well the FEL requirement for the accelerator. The numerical simulations are performed for the proposed facility at Brookhaven in which λs = 10 μm, B = 1.5 T (linearly tapered lw = 1.31-6.28 cm) and the optical beam power is either 8 × 1011 W or 2.3 × 1010 W. Approximately 70% of the electrons constituting a beam of current 5 mA or 15 A, radius 0.14 mm and initial energy of 50 MeV is accelerated at 50 MeV/m.
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U2 - 10.1016/0168-9002(88)90270-7
DO - 10.1016/0168-9002(88)90270-7
M3 - Article
AN - SCOPUS:0024088075
SN - 0168-9002
VL - 272
SP - 481
EP - 484
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
IS - 1-2
ER -