公开(公告)号：US08558199B2

公开(公告)日：2013-10-15

申请号：US13724379

申请日：2012-12-21

Applicant: Institut National de la Recherche Scientifique

Inventor： Stephane Payeur ,  Sylvain Fourmaux ,  Jean-Claude Kieffer ,  Michel Piche ,  Jean-Philippe MacLean ,  Christopher Tchervenkov

IPC: G21G4/00

CPC classification number: G21G4/00 ,  H01J3/02 ,  H01J3/04 ,  H01J27/20 ,  H01J27/24 ,  H01J31/00 ,  H01J35/02 ,  H05H15/00

Abstract: A method for generating an ultrashort charged particle beam, comprising creating a high intensity longitudinal E-field by shaping and tightly focusing, in an on-axis geometry, a substantially radially polarized laser beam, and using the high intensity longitudinal E-field for interaction with a medium to accelerate charged particles.

Abstract translation: 一种用于产生超短带电粒子束的方法，包括通过在轴上的几何形状中成形和紧密聚焦来产生高强度纵向电场，基本上径向偏振的激光束，并且使用高强度纵向电场进行相互作用 用介质加速带电粒子。

公开(公告)号：US11438997B2

公开(公告)日：2022-09-06

申请号：US17250302

申请日：2019-07-04

Applicant: INSTITUT NATIONAL DE LA RECHERCHE SCIENTIFIQUE ,  UNIVERSITY OF SASKATCHEWAN

Inventor： Sylvain Fourmaux ,  Jean-Claude Kieffer ,  Emil Hallin

IPC: H05G2/00 ,  G01N33/00 ,  G01N23/041

Abstract: A X-ray source, comprising a laser, of a pulse duration of at most 40 fs, instantaneous power of at least about 80 TW, a pulse repetition rate of at least 1 Hz; an optical compressor spectrally shaping the laser beam; focusing optics in the range between f#10 and f#15; and a gas target of electron density after ionization by the laser beam in a range between 1018 cm3 and 1019 cm−3; wherein the focusing optics focuses the laser beam in the gas target, and interaction of the focused laser beam with the gas target generates an X-ray beam, with a focused laser amplitude a0, given by a0=0.855 [IL (1018W/cm2)λL,2 (μm)]1/2, where IL is the on-target laser intensity and λL is the laser wavelength, of at least 2 and a P/Pc ratio value of at least 20, with P being the beam power and Pc a critical power given by Pc=17 (nc/n) GW where n is the electron density and nc is a critical electron density at which the plasma acts as a mirror reflecting the laser beam.