An optically pumped polarized Hminus;source (OPPIS), which is based on the charge exchange between H+ions and electronhyphen;spin polarized alkali atoms has been developed at KEK. Just by applying this scheme to a deuteron beam, it is difficult to obtain a highly vector polarized deuteron beam. To obtain highly vector polarized Dminus;ions, we have developed a lsquo;lsquo;dual optical pumping typersquo;rsquo; of polarized Dminus;source. With this scheme, a 100percnt; vector nuclearhyphen;spin polarization for Dminus;ions is possible in principle. In a preliminary experiment, a 60percnt; vector nuclearhyphen;spin polarized Dminus;ion was obtained.
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