ベータトロンの電子線取出し方法
1966 年 35 巻 4 号 p. 245-250
詳細
1966 年 35 巻 4 号 p. 245-250
It has been said that the X-ray output of a betatron is decreased by1/2_??_1/3 placing a peeler of ferro-magnetic material in the donut. The reason is that it disturbs the magnetic field on the electronic orbit, and many electrons strike it and get lost before they are accelerated. But, by placing a peeler very close to the outside wall of the donut, much more X-rays than before are obtained. The peeler used here is a pipe of Fe-Co alloy, which is easily supported. For producing electron beams, the electronic orbit is expanded outward and at thesame time shifted toward the peeler, so that the most of electrons clear the electron gun and enter the opening of the peeler. Dose-rate of 24 MeV electron beams is about 1000 r/min at 1m from the center line of the magnet, which is excitedby 60c/s A. C.
