Laser evaporated aluminium in ecr 2 ion source

A 10GHz ECR2 ion source had been constructed as an external source of HIRFL injector SFC to provide many species ion beams of gaseous elements since 1995. Recently many nuclear physics studies and atomic physics experiments require HIRFL to accelerate highly stripped ions of metal elements. It is well-known that a number of various methods have been used as a means of introducing solid into ECR plasma. These methods include the use of e:\.1ernally heated ovens, plasma heated crucibles or 'boats', direct plasma evaporation of metallic wires and oxides of the metal elements. ECR2 is very compact source and hasn't access or gaps for an externally heated oven between the segments of the sextupole. In general, solid material rods or crucibles are directly inserted into ECR plasma which can evaporate rapidly both for lowand hightemperature solids. Nevertheless with this methods, the plasma is used both for evaporating and ionizing the sample, so some hot electrons are lost in heating process. In order to separate these two functions, a special inner oven has been developed in GANIL[ I] and Grenoble[2], '."hich also serves as coaxial guide for the microwave. The technique difficulty lies in its size, in its introduction inside the source, and in the electric energy transfer due to the compactness of the source. Therefor, we are attempting to overcome these difficulties to use a c.w laser heating an inner oven, easily to attain the temperature higher than 1200'C, and produce AI6+ ions of more than 50flA.