Technical Report of ISSP Ser. A: Number 2979

Abstract

Using the computer code of MAGNA, a product of Century Research Center in Japan, the Three dimensional (3D) analysis of Direct Current (DC) steering magnet was conducted. Both the horizontal and the vertical field have sufficient uniformity. As the fast steerings are expected to operate in a frequency range up to 100 Hz, the effect of eddy current induced on the vacuum chamber firstly was examined by the Two Dimensional (2D) analysis and found to be difficult to control the horizontal orbit by the fast feedback. By the 3D analysis, satisfactory results have not yet been obtained, because of computer power and inaccurate long search coil data.

セントラル･リサーチ･センター社製品のMAGNAの計算機コードを用いて直流操作磁石の3次元解析を行った。垂直･水平磁場とも十分な一様性を得た。速い操作は100Hzまでの周波数範囲の動作を期待するので最初2次元解析法で真空チャンバに誘起する渦電流効果を吟味し、速いフィードバックで水平方向軌道の制御は難しいことを見出した。計算機の能力とサーチコイルの不正確なデータの問題で3次元解析ではまだ満足な結果を得ていない。