The pulse injector of the low energy positrons
The cryogenic source of slow positrons has been tested with a test isotope 22Na of the initial activity of 80 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, τlife ≥80 s and capture efficiency ε~ 0.4 have been obtained. The maximum number of the accumulated particle was Nexper= 2∙108 at the initial flux of 5∙106 electrons per sec.