Abstract
A computer aided operation system for start-up of cyclotron is being developed in order to support operators who, through their experiences and intuition, adjust dozens of components to maximize extracted beam current.
This paper describes a guidance method using real-time display of feasible setting regions of adjustment parameters. It is a function of the beam adjustment support system. The followings are the key points of this paper.
(1) It is proposed that a cyclotron can be modeled as a series of mapping of beam condition. In this model, the adjustment is consider to be a searching process for a mapping which maps the beam condition into the acceptance of cyclotron.
(2) The searching process is formulated as a nonlinear minimization problem. In order to solve this problem, a fast search algorithm composed of a line search method (golden section search) and an image processing method (border following) is developed. The solutions are the feasible setting regions.
(3) A human interface which displays feasible setting regions and a search history is realized for the beam adjustment support system. It enables that the operators and the computers cooperate the operation of beam adjustment.
