visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
장소 E6-2, 5th fl. #5318 
일시 2015/10/16, 3PM 
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 일시 장소 연사 제목
272 DEC. 16~18 (Sun~Tue)  E6-2. 1st fl. #1323  Prof. Keisuke Totsuka  Lectures on 2d Conformal Field Theory file
271 Apr. 09 (Mon.), 11:00 AM  E6-2. 1st fl. #1323  Dr. Seung-Sup B. Lee  Doublon-holon origin of the subpeaks at the Hubbard band edges file
270 Mar. 29 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. Seung Hyub Baek  Epitaxial Multifunctional Oxide Thin Films for Novel Electronics file
269 Mar. 16 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. JinHee Kim  산화물 다층박막에서의 다양한 물리현상 file
268 Nov. 1 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. YoungWook Kim  Squeezing the best out of 2D materials file
267 May. 11 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. Kun Woo Kim  Disordered Floquet topological insulators file
266 Apr. 12 (Tue.), 4 PM  E6-2. 1st fl. #1323  Dr. Jeehoon Kim, POSTECH  Confinement of Superconducting Vortices in Magnetic Force Microscopy
265 Dec. 7 (Fri.), 04:00 PM  E6-2. 1st fl. #1323  Dr. Joon Ho Jang  Novel probes of interacting electrons in 2D systems file
264 Sep. 10 (Tue.), 03:00 PM  E6-2. 1st fl. #1323  Dr. Mikhail Kiselev  Two-Stage Kondo Effect file
263 Jun. 01 (Fri.), 11:00 AM  E6-2. 1st fl. #1323  Dr. Seung Sae Hong  Topological phases in low-dimensional quantum materials file
262 Sep. 22 (Fri.), 04:00 PM  E6-2. 1st fl. #1323  Dr. GilHo Lee / Department of Physics, POSTECH  Unexpected Electron-Pairing in Integer Quantum Hall Effect file
261 Sep. 27 (Fri.), 04:00 PM  E6-2. 1st fl. #1323  Dr. Jindong Song  0D/1D/2D/3D III-V materials grown by MBE for Optelectronics file
260 Oct. 18 (Tue.), 3PM  E6-2. 1st fl. #1323  Dr. JunHo Suh, Korea Research Institute of Standards and Science  “Hybrid quantum systems with mechanical oscillators”
259 May. 17 (Thu.), 01:30 PM  E6-2. 1st fl. #1323  Prof. Yong-Baek Kim University of Toronto  Quantum Spin Liquid in Kitaev Materials file
258 DEC. 27 (Thu), 04:00 PM  E6-2. 1st fl. #1323  Prof. Na Young Kim  Quantum Innovation (QuIN) Laboratory file
257 Sep. 27 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. Joon Sue Lee  Spin-charge conversion in topological insulators for spintronic applications file
256 Nov. 9 (Fri.), 04:00 PM  E6-2. 1st fl. #1323  Dr. Donghun Lee  Quantum sensing and imaging with diamond defect centers for nano-scale spin physics file
255 Apr. 28 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. JeongYoung Park Graduate School of EEWS, KAIST  Hot electron generation at surfaces and its impact to catalysis and renewable energy conversion
254 Nov. 9 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. Pilkyung Moon  Moiré superlattices – from twisted bilayer graphene to quasicrystal file
253 Jun. 2 (Fri.), 02:30 PM  E6-2. 1st fl. #1323  Dr. Euyheon Hwang(황의헌)  Quasiparticle Interference and Fourier transform scanning tunneling spectroscopy in WTe2 (Weyl semimetal) file