The pulse injector of the low energy positrons
<i>The cryogenic source of slow positrons has been tested with a test isotope </i><sup><i>22</i></sup><i>Na 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, </i>τ<sub><i>life</i></sub><i> </i>≥<i>80 s and capture efficiency ε~ 0.4 have been obtained. The maximum number of the accumulated particle was N</i><sub><i>exper</i></sub><i>= 2</i>∙<i>10</i><sup><i>8</i></sup><i> at the initial flux of 5</i>∙<i>10</i><sup><i>6</i></sup><i> electrons per sec.</i>