抄録
In the first part of the present paper the structure of the accelerating tube and some important techniques in its construction such as conductive coating of the inner surface and the assemblage of electron gun are described in some detail. In the second part, some problems connected with the auxiliary circuits for the betatron such as electron-injection circuit, orbit expanding circuit and monitoring circuit are discussed. Lastly, the controlling system and the operation of the betatron are described.