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Particle and Nuclear Reaction Group (Laser Electron Photon Experiments LEPS/LEPS2) Lab
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An experimental group that investigates nuclei and hadrons using the laser electron photon beam at SPring-8.
AboutAbout the lab
Investigating nuclei and hadrons with laser electron photons
The Laser Electron Photon Experiments (LEPS/LEPS2) of the Particle and Nuclear Reaction Group use the laser electron photon beam at SPring-8 for experiments in nuclear and hadron physics.
The beam is a GeV photon beam produced through inverse Compton scattering, by colliding ultraviolet laser light with 8 GeV electrons circulating in the SPring-8 ring.
Experiments by international collaborations use this beam.
The first LEPS beam was obtained in 1999 at the BL33LEP beamline, and in January 2013 the first LEPS2 beam was obtained at the second beamline, BL31LEP.
Key terms
- Inverse Compton scattering
- A method of producing a photon beam with GeV energy by colliding ultraviolet laser light with high-energy electrons and scattering it back
- SPring-8
- A facility with a synchrotron radiation ring in which 8 GeV electrons circulate. The LEPS beamlines are located here
- Beamline
- Equipment for delivering the beam to experiments. LEPS is at BL33LEP and LEPS2 is at BL31LEP
ResearchResearch themes
The experimental group is advancing experiments that produce laser electron photon beams at SPring-8. The beam is a photon beam produced by inverse Compton scattering and is used in nuclear and hadron physics experiments by international collaborations.
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MembersFaculty
- ProfessorTakashi Nakano
- ProfessorTakatsugu Ishikawa
- Associate ProfessorTomoaki Hotta
- Project ProfessorMizuki Sumihama
- Project ProfessorShin Date
- Project ProfessorYuji Ohashi
- Project ProfessorHajime Shimizu
- Project Associate ProfessorHideki Kohri
- Assistant ProfessorYorihito Sugaya
- Assistant ProfessorKeigo Mizutani
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Columbia University Nevis Lab linear particle accelerator, beam injector. (photo mosaic)” CUBIST DEBRIS / CC BY-SA 4.0 (cropped)
- Experiments with the laser electron photon beam: “SPring- img pano” Artorius / CC BY-SA 3.0 (cropped)
- Related lab (Particle and Nuclear Reaction Group (J-PARC Charm Hadron Spectroscopy Experiment) Lab): “J-PARC Hadron Experimental Facility 4” Kestrel / CC BY-SA 4.0 (cropped)
- Related lab (Fundamental Nuclear Physics Lab (Toyonaka Facility, Tamii Lab)): “Institute of nuclear and particle physics 00048 REP SDR-73 (0693)” DimitrisSideridis / CC BY-SA 4.0 (cropped)
- Related lab (Elementary Particle and Nuclear Reaction Lab (Double Beta Decay Experiment CANDLES)): “MINERvA Neutrino Detector 2011” KeysPhotography.com / CC BY-SA 4.0 (cropped)
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