"Diffraction-free" optical beams in inverse free electron laser accelerators

S. Y. Cai; A. Bhattacharjee; T. C. Marshall

doi:10.1016/0168-9002(88)90270-7

"Diffraction-free" optical beams in inverse free electron laser accelerators

S. Y. Cai, A. Bhattacharjee, T. C. Marshall

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

"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 λ_s = 10 μm, B = 1.5 T (linearly tapered l_w = 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.

Original language	English (US)
Pages (from-to)	481-484
Number of pages	4
Journal	Nuclear Inst. and Methods in Physics Research, A
Volume	272
Issue number	1-2
DOIs	https://doi.org/10.1016/0168-9002(88)90270-7
State	Published - Oct 1988
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Instrumentation

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10.1016/0168-9002(88)90270-7

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@article{a68ff5d148b842f5a02b3779586009db,

title = "{"}Diffraction-free{"} optical beams in inverse free electron laser accelerators",

abstract = "{"}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.",

author = "Cai, {S. Y.} and A. Bhattacharjee and Marshall, {T. C.}",

note = "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.",

year = "1988",

month = oct,

doi = "10.1016/0168-9002(88)90270-7",

language = "English (US)",

volume = "272",

pages = "481--484",

journal = "Nuclear Inst. and Methods in Physics Research, A",

issn = "0168-9002",

publisher = "Elsevier B.V.",

number = "1-2",

}

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 Inst. and Methods in Physics Research, A

JF - Nuclear Inst. and Methods in Physics Research, A

IS - 1-2

ER -

"Diffraction-free" optical beams in inverse free electron laser accelerators

Abstract

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