Upload
lot
View
46
Download
0
Embed Size (px)
DESCRIPTION
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. - PowerPoint PPT Presentation
Citation preview
1
Laser-electron beam interactions
group activities
2
Applications of Compton scatteringe- beam+ laser e- + X/g ray
2
Ee 1GeV
g ray 100 MeV
Low energy applications•Medical: radiography &radiotherapy•Museology …
High energy applications • Compton polarimeter
gg collider• Polarised positron
source…
X ray 10-100keV
E(X/g) MeV
Ee20-100MeV Ee 100-1000MeV
Nuclear fluorescence applications•Nuclear physics•Nuclear survey•Nuclear waste management…
g ray 1MeV
ThomX
ELI-NP
MightyLaser
(POSIPOL)
E(e- beam) MeV
llaser=1mm
Introduction to POSIPOL (MightyLaser)
• Polarized e+ by laser Compton Scheme for ILC/CLIC
Ee~1GeV for 10MeV gammas
easy to control polarization
Toward the positron sources -> increase intensity of gamma rays
Courtesy of Omori-san
Biggest issue:The laser beam power… R&D effort
4
MightyLaserFrench Japanese Collaboration(close work, regular meetings since 2005)
Araki-san
K. CassouY. ChaikovskaN. DelerueA. MartensP. Favier
5
Boxes opened 26 july 2010Total weight~3 tons37°C in the ATF hall !
6
electrons
Te
TR
T DFcep2DFcep
femtosecondOscillator
(40-200MHz)
High averagepower
amplifier
Feedback system Dn/n 10-12
+ synchronisation(metrological techno.)
Opticalcavity
Goals: stack as much average power as possible in an optical resonator1MW & produce high flux of circularly polarized g-ray at ATF/KEK
MightyLaser 2008-2013 (R&D setup 2013)
X or g rays
Quasi monochromaticX or g rays
collimator
High flux quasi-monochromatic X/g ray Compton sources
Compton Experiments at ATF
1.3GeV up to 10 bunches/train
Cavity gs
French and Japanese Cavities
Highest g-ray fluxobtained fall 2013
8
Future: ThomX
Laser and FP cavity
Cycle Frep = 20 msecRF pulse length 3 msEnergy 50 - 70 MeV
2 IpsEasy integrationFrees the straight sectionsCSR line
~10m
~7m
9
ThomX: a machine turned toward societal applications
• Transfer of the SR techniques to these new machines. Many fields can be interested…• At present two contributors: *Medical field (ESRF, INSERM Grenoble)
*Cultural Heritage (C2RMF CNRS – Louvre Museum) LAMS(Archeology Labs.)
K-edge imaging
K-edge imaging (Pbwhite, Hg vermilion…) of a Van-Gogh’s paintingJ. Dik et al., Analytical Chemistry, 2008, 80, 6436
PaleontologyNon-destructive analysis
Physiopathology and Contrast agents, Dynamic Contrast Enhancement SRCTConvection Enhanced Delivery =>Stereotactic Synchrotron RT
Imaging,MammographyMicrotomography
J Cereb Blood Flow and Metab, 2007. 27 (2):292-303. Journal of Radiology 53, 226-237 (2005)
Biston et al, Cancer Res 2004, 64, 2317-23
Acknowledgments to G.Le Duc, P.Walter
Phase contrast imaging
10
X-ray line for performing X-ray
experiments
Fully funded, under construction since
2012
Commissioning expected beginning
2016
11
ELI-NP g-ray beam(European answer to a EC tender)
S&C band 700MeV e- LINAC with 2 Compton IPsBucarest(Nuclear applications)
High flux, small bandwidth g-ray beam(~100 better than state of the art)
& entreprises• Alsyom• Amplitude• Comeb• Scandinova
12
LAL contribution to ELI-NPDesign, alignment, synchronization, commissioning of a 32-pass 3D recirculatorHigh precision ‘aberration free’ optical setup
o <100fs synchronizationo Tolerances & cleanliness & damage
issues similar to Laser Mega JouleClose collaboration with ALSYOM CO. in charge of manufacturing ,optical pre-alignments, installations
30cm
Contract signed in march 2014Work up to 2018(LAL has the responsibilityof the optical systems)
Summary
HERA/DesyComptonPolarimeter20002004
ATF/KEKMightyLaserR&D polarized
positron source
OrsayR&D polarizedpositron source20042007
Past Present/futur
OrsayThomX
R&D on high finesse cavity High average laserpower optomecanics, Compton interaction exp.world best finesse in ps & 200fs regimeR&D to be continued to reach 1MW…
Creation of the LAL Accelerator Dpt.Accelerator projects built aroundhigh finesse cavity and optical recirculator
RomaniaELI-NP-GS