Speaker
Dr
Miroslav Sulc
(Technical University of Liberec)
Description
OSQAR experiment in CERN is laser-based experiment for search of axions. Two methods are used for this research. The first one, the photon regeneration effect is looked as a light shining through the wall, whereas in the second one, ultra-fine magnetic birefringence of the vacuum is aimed to be measured for the first time.
The photon regeneration experiment is using two LHC dipole magnets of the length 14.3 m and magnetic field 9.5 T equipped with an optical barrier at the end of the first magnet. Argon laser is a source of 7 W beam. The CCD detector, cooled by liquid nitrogen, measures the laser beam profile by photon counting method. No excess of events above the background was detected at this arrangement.
The second method at OSQAR experiment want to measure for the first time the ultra-fine Vacuum Magnetic Birefringence predicted by the QED. An optical scheme has been proposed, validated and subsequently improved in collaborating institutes. The integration of the newly developed ultra-fine ellipsometry to OSQAR LHC magnets set-up is in preparation.
for the collaboration
on behalf of OSQAR collaboration
Primary author
Dr
Miroslav Sulc
(Technical University of Liberec)
