Transform of a Large Tandem Accelerator into a Small One Using Four Aluminum Pipes

Abstract

At Kyushu University tandem laboratory, preparation for an experiment of ¹²C+⁴He→¹⁶O+ⲩ reaction at stellar energy has been made since 1994. The experiment is very difficult because the reaction cross section should be measured down to 1 pbarn. Many instruments and methods have been invented and developed. Some of them, accel-decel operation of the tandem accelerator, a windowless gas target, and a long-time chopper, are described.