visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2015-10-16 15:00 
일시 2015/10/16, 3PM 
장소 E6-2, 5th fl. #5318 
연사 Dr. Pierre Pugnat , (CNRS-LNCMI) 

High Magnetic Fields to Probe the sub-eV range of Particle/Astroparticle Physics - From the OSQAR experiments at CERN up to new perspectives at LNCMI-Grenoble

2015/10/16(Fri) 3PM, E6-2, (RM)#5318
Dr. Pierre Pugnat , CNRS-
LNCMI  

This seminar will be split in 2 parts. In the first one, the different set-ups, overall results and near future plans of the OSQAR experiments at CERN will be presented after a short reminder highlighting the scientific interests 

of exploring the low, i.e. sub-eV, energy frontier of particle physics. 

In the beginning, OSQAR mostly aimed at measuring the Vacuum Magnetic Birefringence (VMB), which was first predicted by Euler, Heisenberg and Weisskopf in 1936 

and later formally confirmed by Quantum Electrodynamics. 
First steps in the development of a high sensitive ellipsometer for OSQAR-VMB will be briefly presented together with results obtained in measuring the Cotton-Mouton effect 

in Nitrogen gas as a function of pressure. 

The second objective of OSQAR is to search for axions and Axion-Like Particles (ALPS) of sub-eV energy from a "Light Shining through a Wall(LWS)" experiment. 
Similarly to the Primakov process of production of neutral mesons by high-energy photons in a strong electrical field, sub-eV ALPs can be produced from optical photons propagating in a strong magnetic field. 

Owing to their strongly reduced interaction with standard model particles,axions and ALPs can cross an optical barrier beyond which they may be regenerated into detectable photons by the inverse Primakov process. 

As dark matter candidates, interest in axions and ALPs goes beyond particle physics and intersects with cosmology. Last results from the OSQAR-LSW experiment will be presented.
They provide today the most stringent constraint on the di-photon coupling ever achieved in laser-based experiment[i]. 
The third objective of OSQAR is to look for the chameleon particle, from the search of a magnetic afterglow effect due to the possible coupling of chameleons to photons. 

This particle, with an environmentdependent mass, was proposed as a quintessence candidate of dark energy. 

An addendum to the OSQAR proposal has been issued beginning of 2015 to include the CHameleon Afterglow SearchExperimental scheme (CHASE) following the pioneering work of the GammeV collaboration. 
OSQAR-CHASE has been approved by the CERN-SPSC scientific committee. It will be presented highlighting its potential to improve the present exclusion limits constraining chameleon particles[ii]. 
The second part of this seminar will be devoted to ongoing high-field magnet developments at the Grenoble High Magnetic Field Laboratory (LNCMI-Grenoble) of CNRS. 
In particular, the large hybrid magnet user platform under construction[iii] will be presented highlighting its potential 
for the development of new microwave LSW or/and ADMX type experiments based on the large bore superconducting magnet, which will produced 9 T in a 800 mm diameter. 
This second part will provide the context for a possible promising collaboration between IBS-CAPP and CNRS-LNCMI and is expected to trigger fruitful discussions.

[i] R. Ballou, P. Pugnat, et al. (OSQAR collaboration), New Exclusion Limits for the Search of Scalar and Pseudoscalar Axion-Like Particles fromLight Shining Through a Wallaccepted for publication in Phys. Rev. D, http://arxiv.org/abs/1506.08082
[ii] http://cds.cern.ch/record/2001850/files/SPSC-P-331-ADD-1.pdf
[iii] P. Pugnat, et al., Progress Report on the 43 T Hybrid Magnet of the LNCMI-GrenobleIEEE Trans. on Appl. Supercond. 24, 4301305 (2014)

 

Contact: CAPP Administraion Office(350-8166) 

번호 날짜 장소 제목
공지 2022-11-25 11:00  E6-2 #1323  [Update 세미나영상](응집물리 세미나) DMFT+ NRG: From models to real materials, from local to nonlocal correlations
» 2015-10-16 15:00  E6-2, 5th fl. #5318  High Magnetic Fields to Probe the sub-eV range of Particle/Astroparticle Physics - From the OSQAR experiments at CERN up to new perspectives at LNCMI-Grenoble
187 2015-10-15 10:00  E6-2, 5th fl. #5318  Development of Large-Bore, High Field Magnets at the NHMFL
186 2017-12-15 09:20  E6-2, Lecture Room #1323  Workshop on Magnetism in Unconventional Superconductors 개최 file
185 2016-04-06 15:30  E6-2, RM #1323  Superconducting Quantum Interference Devices for Precision Detection
184 2019-07-21 12:00  E6-2,# 5318  Challenges and Opportunities in Theoretical Particle Physics 2019 file
183 2019-12-27 15:00  E6-2,#5318  The superconducting order parameter puzzle of Sr2RuO4 file
182 2015-07-15 14:00  E6-2,1323  Electronic and optical properties of titanate-based oxide superlattices
181 2022-05-11 16:00  E6-2. #1323 & Zoom  Gravity as a phenomenon in quantum dynamics
180 2022-05-19 16:00  E6-2. #1323 & Zoom  Chasing Long Standing Neutrino Anomalies with MicroBooNE
179 2022-05-18 16:00  E6-2. #1323 & Zoom  Geometry, Algebra, and Quantum Field Theory
178 2022-05-12 16:00  E6-2. #1323 & Zoom  New frontiers of electroweak physics at the LHC
177 2016-11-10 16:00  E6-2. #1323(1st fl.)  Low Dimensional Active Plasmonics and Electron Optics in Graphene
176 2016-11-04 15:00  E6-2. #1323(1st fl.)  Quantum information experiments using few electron spins in semiconductors
175 2016-11-04 13:30  E6-2. #1323(1st fl.)  Exotic phenomena at oxide LaAlO3/SrTiO3 hetero-interface and their applications
174 2016-10-07 16:00  E6-2. #1323(1st fl.)  “Tilt engineering of 4d and 5d transition metal oxides?”
173 2016-10-07 13:30  E6-2. #1323(1st fl.)  “Symmetry and topology in transition metal dichalcogenide?”
172 2016-05-24 16:00  E6-2. #1323(1st fl.)  Electronic and magnetic properties of 2D transition-metal thiophosphates and tunability of magnetic order with carrier density
171 2016-05-11 16:00  E6-2. #1323(1st fl.)  The quest for novel high-temperature superconductors---Prospects and progress in iridates
170 2022-12-20 16:00  E6-2. #2501  Getting into Biology and Medicine as Physicist
169 2016-09-29 16:00  E6-2. #2501(2nd fl.)  Exploring the phase diagram of BaBiO3: epic voyage of just another bad trip?