Coupling of a He-jet transfer system to a Cs sputter ion source for the acceleration of radioactive ions with the Chalk River MP Tandem accelerator
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The concept of coupling a He-jet transfer system to the negative-ion sputter source of the Tandem accelerator at Chalk River has been tested. Negative-ion beams of the radioactive isotopes: 34mCl, 56Co, 60Cu and 103Ag were extracted from a Cs+ sputter ion source by sputtering cathodes that were covered with radioactivity-laden aerosol deposits from a gas-jet transfer system. Efficiencies of 1 to 25% were observed with about 50% of the deposit sputtered in less than one minute. A fast ion-source sample changer and a pneumatically-positioned target chamber have been installed at the MP Tandem accelerator. They are coupled by a He-jet transfer system, permitting the alternate acceleration of stable and radioactive ions.