LINAC2012 - List of Authors (Tanaka, H.)

Paper	Title	Page
TUPB099	Input Coupler of the J-PARC DTL	690
	F. Naito, K. Nanmo, H. Tanaka KEK, Ibaraki, Japan K. Hirano, T. Ito JAEA/J-PARC, Tokai-mura, Japan
	Each tank of J-PARC DTL has two input couplers. The coupler has a movable coupling　loop with an capacitive element which increase the coupling with the tank. The loop position is the outside of the tank, where is the atmosphere. The tank vacuum is kept by the ceramic window on the wall for the coupler port. The ceramic is made of Aluminum oxide of 99.7 % purity. RF properties and the mechanical structure of the coupler were designed adequately in order to achieve the desired performance. We will report the design of the coupler in detail and the experiences for the practical operation of the DTL.

Paper

Title

Page

Input Coupler of the J-PARC DTL

690

F. Naito, K. Nanmo, H. Tanaka
KEK, Ibaraki, Japan
K. Hirano, T. Ito
JAEA/J-PARC, Tokai-mura, Japan

Each tank of J-PARC DTL has two input couplers. The coupler has a movable coupling　loop with an capacitive element which increase the coupling with the tank. The loop position is the outside of the tank, where is the atmosphere. The tank vacuum is kept by the ceramic window on the wall for the coupler port. The ceramic is made of Aluminum oxide of 99.7 % purity. RF properties and the mechanical structure of the coupler were designed adequately in order to achieve the desired performance. We will report the design of the coupler in detail and the experiences for the practical operation of the DTL.