Design of 83.2 MHz RF cavity for SKKUCY-10 cyclotron

Lee, Jong‐Chul; Ghergherehchi, Mitra; Shin, Seungwook; Kim, Huisu; Ha, Donghyup; Namgoong, Ho; Song, Ho Seung; Chai, Jong‐Seo

doi:10.1016/j.nima.2019.05.072

Cited by 8 publications

(5 citation statements)

References 15 publications

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“…The calculation of the capacitance of dee, C, is the same as mentioned in (6). The dissipated power in the RF dee components with resistance of R will be as (9).…”

Section: The Second Method: Using a Relationship Between The Electric...mentioning

confidence: 99%

“…According to (2), the total lost power is calculated from the summation of the dissipated power in the dee component as expressed in (9) and the reflected power. The reflected power is determined by measurement of return loss quantity (S11) using a network analyzer.…”

Section: The Second Method: Using a Relationship Between The Electric...mentioning

confidence: 99%

“…An RF system in a cyclotron consists of three main components, i.e., a RF dee cavity component, a RF generator component, and a low-level control unit [7]- [9]. The first component serves to accelerate particles or ions in the cyclotron tank and the second component is outside the cyclotron vacuum tank serves as an RF resource fed to the first component.…”

Section: Introductionmentioning

confidence: 99%

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Calculation methods of RF power requirement on an RF dee cavity of cyclotron

Silakhuddin

Darmawan

Dwiatmaja

et al. 2023

IJPEDS

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A calculation of the radio frequency radiofrequency (RF) power required to operate the RF dee cavity of cyclotron which of the two dee is in phase has been carried. In this calculation, the object is the RF dee cavity of the DECY-13 cyclotron which operates with an RF frequency of 77.77 MHz and a peak RF dee voltage of 40 kV. The power requirement was determined by calculating the dissipated power in the RF dee that was calculated by two methods. The first method using a relationship between the quality factor and lost power has resulted in the power requirement of 20.55 kW. The second method using a relationship between the electrical current and the lost power has resulted in the power requirement of 19.74 kW. The two results do not seem to have any significant difference. By these calculations, it can be determined the predicted power requirement for operating the RF dee of DECY-13 cyclotron was around 20 kW.

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“…The calculation of the capacitance of dee, C, is the same as mentioned in (6). The dissipated power in the RF dee components with resistance of R will be as (9).…”

Section: The Second Method: Using a Relationship Between The Electric...mentioning

confidence: 99%

Section: The Second Method: Using a Relationship Between The Electric...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Calculation methods of RF power requirement on an RF dee cavity of cyclotron

Silakhuddin

Darmawan

Dwiatmaja

et al. 2023

IJPEDS

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“…The design of the RF cavity depends on various parameters such as the resonant frequency, Dee number, extraction radius, and number of accelerated harmonics. The RF cavity of a classical cyclotron uses a quarter-wavelength resonant cavity [22,23].…”

Section: Design Of the Rf Cavitymentioning

confidence: 99%

Research and Design of the RF Cavity for an 11 MeV Superconducting Cyclotron

Wu,

He,

Wan

et al. 2024

Applied Sciences

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In contrast to the room temperature cyclotron, the superconducting cyclotron’s high operational magnetic field and small extraction radius lead to a magnet design with a reduced radius. This limits the space available for the RF cavity in the 11 MeV superconducting cyclotron, necessitating a more compact RF cavity design. By using the transmission line theory, the complex structure of the quarter-wavelength coaxial cavity can be represented as a microwave circuit. Through relevant theoretical analytical formulas, equivalent circuit parameters can be derived. The resonant frequency of the RF cavity is then determined using the equivalent circuit method. The optimization of the RF cavity structure was achieved by creating a numerical model and conducting finite element numerical calculations on the high-frequency resonant system. The comparative results between the equivalent circuit and numerical calculations indicate that the frequency error remains within 0.1%, validating the compact RF cavity design. A multiple linear regression analysis facilitates the prediction of resonance frequency across various parameter variables. By analyzing the fitting formula, RF cavity machining error requirements are established, ensuring a prediction error within 1%, thus meeting engineering design criteria.

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“…Moreover, the electromagnetic field results presented in this work will be provided to a novel 3D particle dynamics code. RF modeling and simulations of this kind of cavities are present in literature [11][12][13][14][15][16][17]. In this work, the electromagnetic simulations have been carried out through two commercial simulation softwares, COMSOL Multyphysics 5.4 [18] and CST Microwave Studio 2020 [19], using both the "eigenmode" and "driven" solvers.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Simulations and Measurements of the K-800 Superconducting Cyclotron RF Cavity at INFN-LNS

et al. 2021

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In this paper, a complete three-dimensional (3D) RF model of the cyclotron coaxial resonator—including the coaxial sliding shorts, the “Liner” vacuum chamber, the coupler, the trimmer, and the high RF voltage “Dee” structures—has been developed. An eigenmode analysis was used to simulate the tuning of the resonator in the operating frequency range of 15–48 MHz obtained by two movable sliding shorts and a trimmer. A driven analysis has been performed in order to compute the |S11| parameter (or impedance matching) of the cavity excited by a movable coaxial power coupler. The numerical simulations have been performed using the different peculiarities of two commercial tools, COMSOL Multiphysics and CST microwave studio. Experimental validation of the developed model is presented. The evidence of an unwanted electric field component, orthogonal to the accelerating field, was discovered and a mitigation is also proposed. The impact of the proposed modification was evaluated by using a 3D beam dynamics code under development in the framework of the Superconducting Cyclotron upgrade ongoing at INFN-LNS.

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Design of 83.2 MHz RF cavity for SKKUCY-10 cyclotron

Cited by 8 publications

References 15 publications

Calculation methods of RF power requirement on an RF dee cavity of cyclotron

Calculation methods of RF power requirement on an RF dee cavity of cyclotron

Research and Design of the RF Cavity for an 11 MeV Superconducting Cyclotron

Electromagnetic Simulations and Measurements of the K-800 Superconducting Cyclotron RF Cavity at INFN-LNS

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