CERN Accelerating science

Article
Title	Design Studies on a High-Power Wide-Band RF Combiner for Consolidation of the Driver Amplifier of the J-PARC RCS
Author(s)	Okita, Hidefumi (KEK, Tsukuba ; J-PARC) ; Hara, Keigo (KEK, Tsukuba ; J-PARC) ; Hasegawa, Katsushi (KEK, Tsukuba ; J-PARC) ; Nomura, Masahiro (KEK, Tsukuba ; J-PARC) ; Ohmori, Chihiro (KEK, Tsukuba ; J-PARC) ; Paoluzzi, Mauro (CERN) ; Shimada, Taihei (KEK, Tsukuba ; J-PARC) ; Sugiyama, Yasuyuki (KEK, Tsukuba ; J-PARC) ; Tamura, Fumihiko (KEK, Tsukuba ; J-PARC) ; Yamamoto, Masanobu (KEK, Tsukuba ; J-PARC) ; Yoshii, Masahito (KEK, Tsukuba ; J-PARC)
Publication	2022
Number of pages	3
In:	JACoW IPAC 2022 (2022) 1333-1335
In:	13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1333-1335
DOI	10.18429/JACoW-IPAC2022-TUPOTK051
Subject category	Accelerators and Storage Rings
Abstract	A power upgrade of the existing 8 kW solid-state driver amplifier is required for the acceleration of high intensity proton beams in the J-PARC 3 GeV rapid cycling synchrotron (RCS). The development of a 25 kW amplifier with gallium nitride (GaN) HEMTs and based on 6.4 kW modules is ongoing. The combiner is a key component to achieve such a high output power over the wide bandwidth required for multi-harmonic rf operation. This paper presents a preliminary design of the combiner. The circuit simulation setup and results, including the realistic magnetic core characteristics and frequency response of the cables are reported.
Copyright/License	CC-BY-3.0

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