Title of article
Model cavity of an alternating-phase-focused IH-DTL
Author/Authors
Iwata، نويسنده , , Y. and Fujimoto، نويسنده , , T. and Miyahara، نويسنده , , N. and Fujisawa، نويسنده , , T. and Ogawa، نويسنده , , H. and Yamada، نويسنده , , S. and Murakami، نويسنده , , T. and Mitsumoto، نويسنده , , T. and Tsutsui، نويسنده , , H.، نويسنده ,
Pages
8
From page
256
To page
263
Abstract
A compact injector for medical accelerators was designed. The injector consists of a compact Electron-Cyclotron-Resonance Ion Source (ECRIS) and two linacs, which are a Radio-Frequency-Quadrupole (RFQ) linac and an Interdigital H-mode Drift-Tube-Linac (IH-DTL) having the same operating frequency of 200 MHz. For beam focusing of the IH-DTL, the method of Alternating-Phase-Focusing (APF) was applied. Before constructing the compact injector, a model cavity of the IH-DTL was manufactured, and measurements of the electric-field distributions were performed. The gap-voltage distributions, obtained by integrating the measured electric field, were compared with those calculated using a three-dimensional field solver. The accuracy of the calculated field distributions is discussed. Finally, fine adjustments of the gap voltages using inductive tuners are described.
Keywords
Medical accelerator , Heavy ion linac , Alternating-Phase-Focusing (APF) , Interdigital H-mode (IH)
Journal title
Astroparticle Physics
Record number
2029540
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