[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Monday, Dec. 12, 2016
1:00 p.m. (coffee at 12:45 p.m.)
CEBAF Center, Room L102
*
Yoshitaka Taira
AIST Tsukuba

**Gamma-ray Vortex Generation by Inverse Compton Scattering*

In this talk, I will present a development of a gamma-ray vortex using 
an inverse Compton scattering (ICS).
The vortex beam forms a helical wave front along the direction of 
propagation and carries discrete values m hbar
  of orbital angular momentum (OAM) per photon. Fundamental and applied 
research on optical vortices using visible
wavelength lasers is ongoing. However, vortex beams are not limited to 
visible light but include the sub-MeV
electron vortex, ~ 10 keV X-ray vortex, terahertz wave vortex, and cold 
neutron vortex. ICS of a laser photon
by a relativistic electron is one of the promising technique to generate 
the gamma-ray vortex in the MeV and GeV
range. Gamma-ray vortex providing an additional degree of freedom will 
open new research opportunities to the
nuclear physics. Characteristics of the gamma-ray vortices generated via 
two different ICS methods and basic
experiments of the optical vortex laser generated by a holographic 
grating will be presented.




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