Laser-electron beam interactions group activities. g ray 100 MeV. g ray 1MeV. E e 20-100MeV. E e 1GeV. E e 100-1000MeV. Applications of Compton scattering e - beam + laser e - + X/ g ray. l laser =1 m m. E( X /g) MeV. Mighty Laser (POSIPOL). ELI-NP. ThomX.
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Applications of Compton scatteringe- beam+ laser e- + X/g ray
X ray 10-100keV
Ee~1GeV for 10MeV gammas
easy to control polarization
The laser beam power…
Toward the positron sources
-> increase intensity of gamma rays
Courtesy of Omori-san
(close work, regular meetings since 2005)
N. DelerueA. MartensP. Favier
Total weight~3 tons
37°C in the ATF hall !
High flux quasi-monochromatic X/g ray Compton sources
Feedback system Dn/n10-12
X or g rays
X or g rays
Goals: stack as much average power as possible in an optical resonator1MW
& produce high flux of circularly polarized g-ray at ATF/KEK
French and Japanese Cavities
Highest g-ray fluxobtained fall 2013
up to 10 bunches/train
and FP cavity
K-edge imaging (Pbwhite, Hg vermilion…) of a Van-Gogh’s painting
Phase contrast imaging
S&C band 700MeV e- LINAC with 2 Compton IPsBucarest
High flux, smallbandwidthg-raybeam
(~100 betterthan state of the art)
Design, alignment, synchronization, commissioning of a 32-pass 3D recirculator
High precision ‘aberration free’ optical setup
Contract signed in march 2014
Work up to 2018
(LAL has the responsibilityof the optical systems)
MightyLaserR&D polarizedpositron source
R&D polarizedpositron source
Creation of the LAL Accelerator Dpt.
Accelerator projectsbuiltaroundhigh finesse cavity and opticalrecirculator
R&D on high finesse cavity High average laserpower optomecanics, Compton interaction exp.
world best finesse in ps& 200fs regime
R&D to becontinued to reach 1MW…