Double-confocal resonator for X-ray generation via intracavity Thomson scattering

Title: Double-confocal resonator for X-ray generation via intracavity Thomson scattering

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Abstract

There has been a growing interest in developing compact X-ray sources through Thomson scattering of a laser beam by a relativistic electron beam. For higher X-ray flux it is desirable to have the scattering to occur inside an optical resonator where the laser power is higher. In this paper I propose a double-confocal resonator design optimized for head-on Thomson scattering inside an FEL oscillator and analyze its performance taking into account the diffraction and FEL gain. A double confocal resonator is equivalent to two confocal resonators in series. Such a resonator has several advantages: it couples electron beam through and X-ray out of the cavity with holes on cavity mirrors, thus allowing the system to be compact; it supports the FEL mode with minimal diffraction loss through the holes; it provides a laser focus in the forward direction for a better mode overlap with the electron beam; and it provides a focus at the same location in the backward direction for higher Thomson scattering efficiency; in addition, the mode size at the focal point and hence the Rayleigh range can be adjusted simply through intracavity apertures; furthermore, it gives a large mode size at the mirrors to reduce power loading.more »« less

Authors:

Xie, M ^[1]

Lawrence Berkeley Lab., CA (United States)

Publication Date:: 1995-12-31

Research Org.:: Brookhaven National Lab., Upton, NY (United States)

OSTI Identifier:: 238679

Report Number(s):: BNL-61982-Absts.; CONF-9508156-Absts.
ON: DE96002729; TRN: 96:013168

DOE Contract Number:: AC03-76SF00098

Resource Type:: Conference

Resource Relation:: Conference: 17. international free electron laser conference, New York, NY (United States), 21-25 Aug 1995; Other Information: PBD: [1995]; Related Information: Is Part Of 17th international free electron laser conference and 2nd international FEL users` workshop. Program and abstracts; PB: 300 p.

Country of Publication:: United States

Language:: English

Subject:: 07 ISOTOPE AND RADIATION SOURCE TECHNOLOGY; 66 PHYSICS; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; X-RAY SOURCES; PHOTON-ELECTRON COLLISIONS; THOMSON SCATTERING; FREE ELECTRON LASERS; CAVITY RESONATORS; DESIGN

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                    Xie, M. Double-confocal resonator for X-ray generation via intracavity Thomson scattering.  United States: N. p., 1995. 
        Web.

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                    Xie, M. Double-confocal resonator for X-ray generation via intracavity Thomson scattering.  United States.

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                    Xie, M. Sun .  
        "Double-confocal resonator for X-ray generation via intracavity Thomson scattering".  United States.  https://www.osti.gov/servlets/purl/238679.

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@article{osti_238679,

  title        = {Double-confocal resonator for X-ray generation via intracavity Thomson scattering},

  author       = {Xie, M},

  abstractNote = {There has been a growing interest in developing compact X-ray sources through Thomson scattering of a laser beam by a relativistic electron beam. For higher X-ray flux it is desirable to have the scattering to occur inside an optical resonator where the laser power is higher. In this paper I propose a double-confocal resonator design optimized for head-on Thomson scattering inside an FEL oscillator and analyze its performance taking into account the diffraction and FEL gain. A double confocal resonator is equivalent to two confocal resonators in series. Such a resonator has several advantages: it couples electron beam through and X-ray out of the cavity with holes on cavity mirrors, thus allowing the system to be compact; it supports the FEL mode with minimal diffraction loss through the holes; it provides a laser focus in the forward direction for a better mode overlap with the electron beam; and it provides a focus at the same location in the backward direction for higher Thomson scattering efficiency; in addition, the mode size at the focal point and hence the Rayleigh range can be adjusted simply through intracavity apertures; furthermore, it gives a large mode size at the mirrors to reduce power loading. Simulations as well as analytical results will be presented. Also other configurations of intracavity Thomson scattering where the double-confocal resonator could be useful will be discussed.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/238679},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1995},

  month        = {12}

}

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