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Title: Design of radio frequency system for the riken separated sector cyclotron

Abstract

The radio-frequency (RF) system of the RIKEN SSC (K=540) is required to work in a frequency range of 20 to 45 MHz and to generate the maximum acceleration voltage 250 kV. A new movable box type variable frequency resonator is designed for that purpose. This resonator is a compact half wave length coaxial type ((2.1 m(H) x 3.5 m(W) x 1.6 m(D)). The delta shaped dee whose radial length is 2.7 m is supported in median plane by vertical stems from the both sides. The resonant frequency is varied by moving the boxes surrounding the stems. The performance of this resonator is studied on a one-fourth scale model. The maximum power loss is estimated to be 250 kW for the required dee voltages and the radially increasing voltage distributions are obtained. The RF power is fed into the resonator through a 50 ..cap omega.. coaxial feeder line ( about 1.8 m length) which is coupled with the resonator in good impedance matching by means of a variable capacitive coupler. The final amplifier is of grounded grid configuration; load resistance matching is made by a variable capacitor inserted in series at its output port. The final amplifier and its components aremore » studied on full sized models. The result shows the movable box type resonator and power amplifier satisfy the design aim.« less

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
The Institute of Physical and Chemical Research, Wako-Shi Saitama
OSTI Identifier:
6117457
Report Number(s):
CONF-850504-
Journal ID: CODEN: IETNA; TRN: 86-009469
Resource Type:
Conference
Journal Name:
IEEE Trans. Nucl. Sci.; (United States)
Additional Journal Information:
Journal Volume: NS-32:5; Conference: Particle accelerator conference, Vancouver, Canada, 13 May 1985
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; RF SYSTEMS; DESIGN; SUPERCONDUCTING SUPER COLLIDER; MHZ RANGE 01-100; POWER AMPLIFIERS; RADIATION SOURCES; RESONATORS; SCALE MODELS; AMPLIFIERS; ELECTRONIC EQUIPMENT; EQUIPMENT; FREQUENCY RANGE; MHZ RANGE; STORAGE RINGS; STRUCTURAL MODELS; 430303* - Particle Accelerators- Experimental Facilities & Equipment

Citation Formats

Fujisawa, T, Chiba, Y, Kohara, S, Kumata, Y, Ogiwara, K, Oikawa, Y, Takeshita, I, and Yokoyama, I. Design of radio frequency system for the riken separated sector cyclotron. United States: N. p., 1985. Web.
Fujisawa, T, Chiba, Y, Kohara, S, Kumata, Y, Ogiwara, K, Oikawa, Y, Takeshita, I, & Yokoyama, I. Design of radio frequency system for the riken separated sector cyclotron. United States.
Fujisawa, T, Chiba, Y, Kohara, S, Kumata, Y, Ogiwara, K, Oikawa, Y, Takeshita, I, and Yokoyama, I. Tue . "Design of radio frequency system for the riken separated sector cyclotron". United States.
@article{osti_6117457,
title = {Design of radio frequency system for the riken separated sector cyclotron},
author = {Fujisawa, T and Chiba, Y and Kohara, S and Kumata, Y and Ogiwara, K and Oikawa, Y and Takeshita, I and Yokoyama, I},
abstractNote = {The radio-frequency (RF) system of the RIKEN SSC (K=540) is required to work in a frequency range of 20 to 45 MHz and to generate the maximum acceleration voltage 250 kV. A new movable box type variable frequency resonator is designed for that purpose. This resonator is a compact half wave length coaxial type ((2.1 m(H) x 3.5 m(W) x 1.6 m(D)). The delta shaped dee whose radial length is 2.7 m is supported in median plane by vertical stems from the both sides. The resonant frequency is varied by moving the boxes surrounding the stems. The performance of this resonator is studied on a one-fourth scale model. The maximum power loss is estimated to be 250 kW for the required dee voltages and the radially increasing voltage distributions are obtained. The RF power is fed into the resonator through a 50 ..cap omega.. coaxial feeder line ( about 1.8 m length) which is coupled with the resonator in good impedance matching by means of a variable capacitive coupler. The final amplifier is of grounded grid configuration; load resistance matching is made by a variable capacitor inserted in series at its output port. The final amplifier and its components are studied on full sized models. The result shows the movable box type resonator and power amplifier satisfy the design aim.},
doi = {},
journal = {IEEE Trans. Nucl. Sci.; (United States)},
number = ,
volume = NS-32:5,
place = {United States},
year = {1985},
month = {10}
}

Conference:
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