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

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 » 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.« less

Authors:
 [1]
  1. Lawrence Berkeley Lab., CA (United States)
Publication Date:
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

Citation Formats

Xie, M. Double-confocal resonator for X-ray generation via intracavity Thomson scattering. United States: N. p., 1995. Web.
Xie, M. Double-confocal resonator for X-ray generation via intracavity Thomson scattering. United States.
Xie, M. Sun . "Double-confocal resonator for X-ray generation via intracavity Thomson scattering". United States. https://www.osti.gov/servlets/purl/238679.
@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}
}

Conference:
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