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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS)
Idrus Abdul Kudus
National Research and Innovation Agency
Control & Systems Engineering Electrical & Electronics Engineering

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Calculation methods of RF power requirement on an RF dee cavity of cyclotron Silakhuddin Silakhuddin; Rian Suryo Darmawan; Agus Dwiatmaja; Ahsani Hafizhu Shali; Idrus Abdul Kudus; Taufik Taufik
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 14, No 3: September 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v14.i3.pp1553-1561

Abstract

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.
Analytical formulation of relationship between ionization current and extracted ion beam current in a Penning ion source Silakhuddin Silakhuddin; Idrus Abdul Kudus; Bambang Murdaka Eka Jati; Dwi Satya Palupi; Taufik Taufik; Emy Mulyani; Heranudin Heranudin
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 17, No 1: March 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v17.i1.pp629-639

Abstract

A study on the performance of the Penning-type internal ion source of the DECY-13 cyclotron has been conducted to evaluate the relationship between cathode current and extracted ion beam current, as well as the stability of the extracted beam. The DECY-13 cyclotron, developed at the Research Center of Accelerator Technology, BRIN, is designed to produce 13 MeV protons for radioisotope production. In the experiment, the cathode current was varied between 200-400 mA, while the magnetic field and extraction voltage at 1.25 T and 3 kV, respectively. The results indicate a clear power-law dependence between cathode current (Ic) and extracted beam current (Iext), expressed as Iext=343.8 Ic^1.42 . This relationship suggests that ionization efficiency increases sharply with cathode current. Stability tests at 400 mA cathode current showed that the extracted beam current remained stable at ~70 μA over 45 minutes, with only minor fluctuations. These findings demonstrate that cathode current is an effective parameter for controlling extracted beam current. The results contribute to a better understanding of ion source behavior in cyclotron systems and provide a foundation for further optimization of Penning ion sources for radioisotope production.
Co-Authors Agus Dwiatmaja Ahsani Hafizhu Shali Bambang Murdaka Eka Jati Dwi Satya Palupi Emy Mulyani Heranudin Heranudin Rian Suryo Darmawan Silakhuddin Silakhuddin Silakhuddin Silakhuddin Taufik Taufik