Cyclotrons2019 - List of Keywords (coupling)

Paper	Title	Other Keywords	Page
MOP029	Design and Manufacture of 10 kW, 83.2 MHz 4-way Power Combiner for Solid State Amplifier	insertion, simulation, ISOL, target	97
	D.H. Ha, J.-S. Chai, Kh.M. Gad, M. Ghergherehchi, H.S. Kim, J.C. Lee, H. Namgoong SKKU, Suwon, Republic of Korea
	The purpose of this study is to improve the insertion loss of a 20 kW solid-state RF power amplifier and the power coupling efficiency by reducing reflected power. For this purpose, a power combiner, which is a core component of a solid-state RF power amplifier, was designed and fabricated. The 4-way power combiner employs the Wilkinson type, which has excellent power coupling efficiency and isolation, and operates at 83.2 MHz. This paper covers the design and cold test results.
	Poster MOP029 [1.396 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP029
About •	paper received ※ 15 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOP030	RF measurement of SKKUCY-10 RF Cavity for Impedance Matching	cavity, impedance, cyclotron, beam-loading	100
	J.C. Lee, J.-S. Chai, Kh.M. Gad, M. Ghergherehchi, D.H. Ha, H.S. Kim, H. Namgoong SKKU, Suwon, Republic of Korea
	Funding: Radiation Technology R&D program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning through the National Research Foundation of Korea The 10 MeV cyclotron was designed for next version in Sungkyunkwan University, after the SKKUCY-9 had developed for medical application for PET. The RF cavity, which generates the electric field in cyclotron, was designed based on a half-wavelength resonator and optimized to improve the unloaded quality factor (Q₀). The design specifications of RF cavity were resonance frequency 83.2 MHz, Q₀ 5830 and Dee voltage 40 kV with geometrical values resonator length 560 mm, Dee angle 35° and Stem radius 16 mm. The RF cavity of the SKKUCY-10 was fabricated and installed inside the electromagnet, and RF characteristics were measured with a network analyzer. The RF coupling coefficient and characteristic impedance for desired condition were selected at 1.08 and 52 ’, respectively. The RF coupling coefficient and characteristic impedance were measured 0.8-1.2, 52-49 ’ according to temperature as 15-21°C. The power coupler was checked for optimization of RF coupling coefficient and characteristic impedance, and the results show good agreement with simulated and measured data.
	Poster MOP030 [1.665 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP030
About •	paper received ※ 15 September 2019 paper accepted ※ 23 June 2020 issue date ※ 20 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOP029

Design and Manufacture of 10 kW, 83.2 MHz 4-way Power Combiner for Solid State Amplifier

insertion, simulation, ISOL, target

97

D.H. Ha, J.-S. Chai, Kh.M. Gad, M. Ghergherehchi, H.S. Kim, J.C. Lee, H. Namgoong
SKKU, Suwon, Republic of Korea

The purpose of this study is to improve the insertion loss of a 20 kW solid-state RF power amplifier and the power coupling efficiency by reducing reflected power. For this purpose, a power combiner, which is a core component of a solid-state RF power amplifier, was designed and fabricated. The 4-way power combiner employs the Wilkinson type, which has excellent power coupling efficiency and isolation, and operates at 83.2 MHz. This paper covers the design and cold test results.

Poster MOP029 [1.396 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP029

About •

paper received ※ 15 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOP030

RF measurement of SKKUCY-10 RF Cavity for Impedance Matching

cavity, impedance, cyclotron, beam-loading

100

J.C. Lee, J.-S. Chai, Kh.M. Gad, M. Ghergherehchi, D.H. Ha, H.S. Kim, H. Namgoong
SKKU, Suwon, Republic of Korea

Funding: Radiation Technology R&D program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning through the National Research Foundation of Korea
The 10 MeV cyclotron was designed for next version in Sungkyunkwan University, after the SKKUCY-9 had developed for medical application for PET. The RF cavity, which generates the electric field in cyclotron, was designed based on a half-wavelength resonator and optimized to improve the unloaded quality factor (Q₀). The design specifications of RF cavity were resonance frequency 83.2 MHz, Q₀ 5830 and Dee voltage 40 kV with geometrical values resonator length 560 mm, Dee angle 35° and Stem radius 16 mm. The RF cavity of the SKKUCY-10 was fabricated and installed inside the electromagnet, and RF characteristics were measured with a network analyzer. The RF coupling coefficient and characteristic impedance for desired condition were selected at 1.08 and 52 ’, respectively. The RF coupling coefficient and characteristic impedance were measured 0.8-1.2, 52-49 ’ according to temperature as 15-21°C. The power coupler was checked for optimization of RF coupling coefficient and characteristic impedance, and the results show good agreement with simulated and measured data.

Poster MOP030 [1.665 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP030

About •

paper received ※ 15 September 2019 paper accepted ※ 23 June 2020 issue date ※ 20 June 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)