DEVELOPMENT OF THE POSITRON INJECTOR FOR LEPTA FACILITY

V. Bykovsky¹, I. Meshkov¹, V. Pavlov¹, R. Pivin¹, A. Rudakov¹, G. Trubnikov¹, S. Yakovenkoª¹, M.K. Eseev²

¹Joint Institute for Nuclear Research, Dubna, Russia

²Lomonosov Pomor State University, Arkhangelsk, Russia

Abstract

An injector of the low energy positrons for the accumulator LEPTA has being assembled at JINR. The injector is based on ²²Na radioactive source. Positrons from the source are moderated in the solid neon. The cryogenic source of slow positrons has been tested with a isotope ²²Na of the initial activity of 0.8 MBk. The continuous slow positron beam with average energy of 1.2 eV, width of a spectrum 1 eV has been obtained. The achieved moderator efficiency is about 1 %.

The accumulation process in the positron trap was investigated with electron flux. The life time of the electrons in the trap, τ_life≥80 s and capture efficiency ε~0.4 have been obtained. The maximum number of the accumulated particle was N_exper = 2∙10⁸ at the initial flux of 5∙10⁶ electrons per sec.

ª – corresponding author

Paper Slides

382

DYNAMIC POSITRONIC BUNCH IN SURKO TRAP OF LEPTA FACILITY

I.N. Meshkov¹, A.V. Smirnov¹, S.L. Yakovenko¹, M.K. Eseevª²

¹Joint Institute for Nuclear Research, Dubna, Russia

²Lomonosov Pomor State University, Arkhangelsk, Russia

Abstract

On base of solution of dynamic equations of motion is presented the explanation of effect of influence rotating wall electric field the positron bunch in Surko trap, being one of the elements of LEPTA faculty.

ª – corresponding author

Paper Slides

385