Improved version of ionizer for nuclear polarized negative ion beam production

The enhancement of characteristics of the operated nuclear polarized negative ion sources can be reached by using of improved modification of ionizers with high dense flux of the charge-exchanging negative ions generated by surface plasma sources. Low energy nuclear polarized atoms from focused atomic beam sources (FABS) and from spin exchange optically pumped sources (SEOPS) can be converted into nuclear polarized negative ion with high efficiency and high selectivity. Distinctive features of surface plasma ionizers with improved gas efficiency is discussed. An additional improving of nuclear polarized ion beam characteristics can be reached by the transverse extraction of ions from strong magnetic field. These variants of the ionizers and transverse extraction are looking very attractive for production of polarized negative ions of mA intensity level and with increased brightness. The flux of low energy nuclear polarized atoms up to 10 eq. mA was obtained from the focusing atomic sources, and with intensity up to 30 eq. mA from optically pumped spin exchange atomic sources for target. By efficient conversion of this flux into negative ion it is possible to have up to 5--15 mA of negative ion with high nuclear polarization