Abstract
A general method to increase the efficiency of a particle accelerator with an external ion source system is to use a buncher. It generates a pulsed beam from the dc beam and the period of a pulsed beam is matched to RF frequency of cyclotron. A concept drawing of a beam buncher is designed according to the distance of buncher electrode gap and an electric field. Beam bunching is generated, when charged particles are accelerated and decelerated periodically with an electric field at an electrode gaps.In this paper, we designed the beam buncher for the KIRAMS-30 cyclotron. The KIRAMS-30 cyclotron which will be installed at advanced radiation technology institute (ARTI) until next February, is equipped with an external multicusp ion source. The buncher is installed into a beam injection line just before solenoid–quadrupole–quadrupole (SQQ) and injection system design was already fixed. The purpose of the beam buncher was to achieve high efficiency, easy-to-tune and low cost.
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