1. Phoenixon Controls, Hwaseong, South Korea
2. Division of Electronics and Electrical Engineering, Dongguk University, Seoul, South Korea
3. School of Electronics Engineering and the School of Electronic and Electrical Engineering, Kyungpook National University, Daegu, South Korea
4. Department of Electrical, Electronics and Control Engineering, Kongju National University, Cheonan, South Korea
5. Accelerator Division, Pohang Accelerator Laboratory (PAL), Pohang, South Korea