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EXOTIC PHYSICS with ELIWhat is in the proposal and what is
expected to be done in the first place
K. Rohlena
Institute of Physics Academy of Sciences of the Czech Republic
EXOTIC PHYSICS with ELI
Intensity thresholds for relativisticand quantum effects
1.3×1018 W/cm2 relativistic electron quivermotion
1×1023 W/cm2 radiation damping
5×1023 W/cm2 attainable ELI Beamlinesintensity
1.3×1024 W/cm2 relativistic proton quivermotion
5.6×1024 W/cm2 quantum effects
2.4×1029 W/cm2 Schwinger field
EXOTIC PHYSICS with ELI
Spectra of electrons and positrons measured in 600 J/0.5 ps shot on 125 mm Au target. Histograms show PIC simulation of electrons, and corresponding prediction for positron creation by Bremsstrahlung in
the Au target
[T.E. Cowan et al., Nucl. Instr. Meth. Phys. Res. A 455 (200) 130-139]
Positron production
EXOTIC PHYSICS with ELI
Electron-positron pair production. An electron beam intersects a laser pulse, boosting photons to gamma energies and triggering an
interaction that spawns particles
[Volume 277, Number 5330 Issue of 29 August 1997, p. 1202, The American Association for the Advancement of Science]
EXOTIC PHYSICS with ELI
Double illumination of a target with two petawatt laser beams could lead to the production of the electron-positron pair plasma
[The Science and Applications of Ultrafast, Ultraintense Lasers. A report on the SAUUL workshop held (2002)]
EXOTIC PHYSICS with ELI
In the Inverse Compton Scattering a laser pulse collides with an electron bunch. The Doppler energy upshifts the scattered
photons to high energies, e.g. 100 MeV γ -rays with a 10-GeV electron beam.
[Harvey et al., Phys. Rev. Lett. 79 (2009) 063407]
EXOTIC PHYSICS with ELI
Cascading of inverse Compton scattering and pair formation
EXOTIC PHYSICS with ELI
Scattering of photons on photons: Configuration of 4-wave interaction: the incoming laser beams (represented by the wave vectors k1, k2 and k3)
and the direction of the scattered wave (with wave vector k4).
[Moulin, F., Bernard, D. Optics Communications 164 (1999) 137-144]
EXOTIC PHYSICS with ELI
The vacuum birefringence turns the linear polarization of the laser beam into the elliptical one in presence of strong magnetic field
[S.Y. Buhmann. On the search for nothing: Vacuum birefringence and Casimir-Polder forces, Institutsseminar TPI 2005 FSU Jena]
EXOTIC PHYSICS with ELI
The experimental scheme for the vacuum birefringence observation
[S. Y. Buhmann. On the search for nothing: Vacuum birefringence and Casimir-Polder forces, Institutsseminar TPI 2005 FSU Jena]
EXOTIC PHYSICS with ELI
Possible experimental arrangement for proving the vacuum birefringence using a “photon collider”
[E. Brezin and C. Itzykson, Phys. Rev. D3, 618 (1970)]
EXOTIC PHYSICS with ELI
Two-photon amplitudes for Unruh radiation on the left side and Larmor radiation on the right side
[W. G. Unruh and R. M. Wald, Phys. Rev. D 29, 1047 (1984), R. Schützhold, G. Schaller and D. Habs, Phys.Rev.Lett. 97 (2006);
R. Schützhold, Gernot Schaller and Dietrich Habs, Phys.Rev.Lett. 97 (2006)]
EXOTIC PHYSICS with ELI
AXION checkAxions - calibration particles beyond the
standard model - natural explanation of CP symmetry in the strong interactions.
In a magnetic field: transformation
photons axions.
Axions pass through a thick Al slab changing spontaneously back to the photons
axions photons.An experiment would consist in firing the laser into a perpendicular vacuum magnetic field and monitoring the photons in the slab shadow.
EXOTIC PHYSICS with ELIWhat would make sense to
start with:(1) Formation of positron beams and
possibly electron-positron plasma (1023 W/cm2)
(2) Magnetic field (5 T) vacuum birefringence experiment possibly with an x-ray probe (1022 W/cm2) combined with axion check (large statistics)