Cyclotrons2013 - List of Keywords (rf-amplifier)

Paper	Title	Other Keywords	Page
TUPPT004	The Development of Control System for 9 MeV Cyclotron	controls, cyclotron, vacuum, status	159
	Y.S. Lee, J.-S. Chai, S.Y. Jung, H.S. Kim, H.W. Kim, S.H. Kim, J.C. Lee, S.H. Lee, J.K. Park, S. Shin, H.S. Song, Y.H. Yeon SKKU, Suwon, Republic of Korea K.-H. Park PAL, Pohang, Kyungbuk, Republic of Korea
	The Sungkyunkwan University has developed the 9 MeV cyclotron for producing radio isotopes. In order to operate the cyclotron stably, all sub-systems in the cyclotron are controlled and monitored consistently. Therefore, each sub-system includes control devices, which is developed based on PLC, or DSP chip and the sub control modules interface with main control system in real time. As main control system, we choose the CompactRIO system from NI (National Instrument) to take into account the latency and robust control. The control system has high-performance processor running real-time OS, so that the system can control the cyclotron fast and exactly. In addition, the system can be remotely accessed over the network to monitor the status of cyclotron easily. The configuration of control system for 9 MeV cyclotron and performance test result will be described in this paper.

TUPPT028	Development of 20 kW RF Amplifier for Compact Cyclotron	impedance, vacuum, cyclotron, cathode	212
	S.H. Lee, J.-S. Chai, T.V. Cong, H.S. Kim, Y.S. Lee, H.S. Song, Y.H. Yeon SKKU, Suwon, Republic of Korea J.H. Kim KIRAMS, Seoul, Republic of Korea
	Funding: This work was supported by Nuclear R&D program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology. (2012-0925001) Compact cyclotron for PET RI production accelerates H⁻ ions using electric field. For accelerating ions in cyclotron, RF amplifier is developed to transmit RF power to RF resonating cavity. RF amplifier generates high-power RF signal up to 20 kW with narrow band frequency. The amplifier device was used of triode vacuum tube operated in cathode-driven. Impedance matching systems were composed of bridge-network system. Components of impedance matching system had rigid structure to endure high-power RF signal. Variable inductors of matching components have been used of short-bar movement system for changing reactance of characteristic impedance. The experiment results were measured by VSWR meter and network analyzer.

TUPPT030	Development of 1.5 kW RF Driver for Compact Cyclotron	cathode, impedance, vacuum, cyclotron	218
	H.S. Song, J.-S. Chai, T.V. Cong, S.Y. Jung, H.S. Kim, S.H. Lee, Y.S. Lee, S. Shin, Y.H. Yeon SKKU, Suwon, Republic of Korea J.H. Kim KIRAMS, Seoul, Republic of Korea
	1.5 kW RF driver is being designed and manufactured with the resonance frequency of 83.2 MHz. Triode (3CX1500A7) is used for RF power amplification, and ground grid amplifier (G.G. Amp.) type was adopted for this RF driver since the circuit design and realization is simple. Anode, and cathode voltage of RF driver is approximately 3500V, and 5V respectively. In this paper, impedance matching process of RF driver is described. Variable capacitor and variable inductor is utilized to implement the impedance matching for cathode and anode. In addition, RF power output characteristics compared with RF input is shown.

Paper

Title

Other Keywords

Page

TUPPT004

The Development of Control System for 9 MeV Cyclotron

controls, cyclotron, vacuum, status

159

Y.S. Lee, J.-S. Chai, S.Y. Jung, H.S. Kim, H.W. Kim, S.H. Kim, J.C. Lee, S.H. Lee, J.K. Park, S. Shin, H.S. Song, Y.H. Yeon
SKKU, Suwon, Republic of Korea
K.-H. Park
PAL, Pohang, Kyungbuk, Republic of Korea

The Sungkyunkwan University has developed the 9 MeV cyclotron for producing radio isotopes. In order to operate the cyclotron stably, all sub-systems in the cyclotron are controlled and monitored consistently. Therefore, each sub-system includes control devices, which is developed based on PLC, or DSP chip and the sub control modules interface with main control system in real time. As main control system, we choose the CompactRIO system from NI (National Instrument) to take into account the latency and robust control. The control system has high-performance processor running real-time OS, so that the system can control the cyclotron fast and exactly. In addition, the system can be remotely accessed over the network to monitor the status of cyclotron easily. The configuration of control system for 9 MeV cyclotron and performance test result will be described in this paper.

TUPPT028

Development of 20 kW RF Amplifier for Compact Cyclotron

impedance, vacuum, cyclotron, cathode

212

S.H. Lee, J.-S. Chai, T.V. Cong, H.S. Kim, Y.S. Lee, H.S. Song, Y.H. Yeon
SKKU, Suwon, Republic of Korea
J.H. Kim
KIRAMS, Seoul, Republic of Korea

Funding: This work was supported by Nuclear R&D program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology. (2012-0925001)
Compact cyclotron for PET RI production accelerates H⁻ ions using electric field. For accelerating ions in cyclotron, RF amplifier is developed to transmit RF power to RF resonating cavity. RF amplifier generates high-power RF signal up to 20 kW with narrow band frequency. The amplifier device was used of triode vacuum tube operated in cathode-driven. Impedance matching systems were composed of bridge-network system. Components of impedance matching system had rigid structure to endure high-power RF signal. Variable inductors of matching components have been used of short-bar movement system for changing reactance of characteristic impedance. The experiment results were measured by VSWR meter and network analyzer.

TUPPT030

Development of 1.5 kW RF Driver for Compact Cyclotron

cathode, impedance, vacuum, cyclotron

218

H.S. Song, J.-S. Chai, T.V. Cong, S.Y. Jung, H.S. Kim, S.H. Lee, Y.S. Lee, S. Shin, Y.H. Yeon
SKKU, Suwon, Republic of Korea
J.H. Kim
KIRAMS, Seoul, Republic of Korea

1.5 kW RF driver is being designed and manufactured with the resonance frequency of 83.2 MHz. Triode (3CX1500A7) is used for RF power amplification, and ground grid amplifier (G.G. Amp.) type was adopted for this RF driver since the circuit design and realization is simple. Anode, and cathode voltage of RF driver is approximately 3500V, and 5V respectively. In this paper, impedance matching process of RF driver is described. Variable capacitor and variable inductor is utilized to implement the impedance matching for cathode and anode. In addition, RF power output characteristics compared with RF input is shown.