The LEPTA Facility for Fundamental Studies of Positronium Physics and Positron Spectroscopy


Article Preview

At present time the Low Energy Positron Toroidal Accumulator (LEPTA) at JINR is under commissioning with circulating positron beam. The LEPTA facility is a small positron storage ring equipped with the electron cooling system and positron injector. The maximum positron energy is of 10 keV. The storage ring is aimed for generation of direct fluxes of ortho-positronium (o-Ps), produced in recombination of the positron beam circulating in the ring with single pass cooling electron beam. The project has few goals: annihilation spectroscopy (PAS) to monitoring defects of nanometer sizes in materials as a function of depth managed by the positron energy in a rage of a few eV to 100 keV.



Edited by:

Jozef Krištiak, Jan Kuriplach and Pradeep K. Pujari




A. A. Sidorin et al., "The LEPTA Facility for Fundamental Studies of Positronium Physics and Positron Spectroscopy", Materials Science Forum, Vol. 733, pp. 291-296, 2013

Online since:

November 2012




[1] E. Akhmanova, A. Kobets, V. Lokhmatov, et. al.: Particles and Nuclei, Letters, Vol. 7 (2010), p.814.

[2] A.A. Sidorin, I.N. Meshkov, et. al.: Positron Annihilation Spectroscopy at LEPTA Facility, These Proceedings.

[3] I.N. Meshkov, A.O. Sidorin, I.A. Seleznev, A.V. Smirnov, E.M. Syresin, and G.V. Trubnikov, Modified Betatron, Fiz. Elem. Chastits At. Yadra Vol. 36 (2005), p.1071–1133 [Phys. Part. Nucl. Vol. 36 (2005), p.562].

[4] L.B. Okun': Mirror Particles and Mirror Matter: 50 Years of Speculation and Searching, Usp. Fiz. Nauk Vol. 177 (2007), p.397–406 [Phys. Usp. Vol. 50 (2007), p.380].


[5] I.N. Meshkov: Experimental Investigation of the Physics of Antihydrogen and Positronium. Problems and Possibilities, Fiz. Elem. Chastits At. Yadra Vol. 28 (1997), p.495–540 [Phys. Part. Nucl. Vol. 28 (1997), p.198].