On the Apparatus for the Multiple Acceleration of Light Ions to High Speeds

Significant improvements of the apparatus for the multiple acceleration of light ions, now called the "cyclotron," have recently been made. The apparatus produces many microamperes of deuterons having energies up to 6.3 Mev and a few tenths of a microampere of 11 Mev doubly charged helium ions. The means of deflecting the high speed ions from the accelerating system has also been improved, with the result that the ions can now be withdrawn completely from the apparatus into the air through a thin window in the chamber wall. The present paper is devoted to a detailed description of the cyclotron, including its adjustment and operation, with a discussion of the questions involved.