Initial operation of 3 MW dual output high voltage power supply with IC RF system

•Plasma Heating and current dive.•High Voltage Power Supply.•Pulse Step Modulation.•Multi-secondary transformer and switched power supply modules.•Tetrode and Diacrode based Radio Frequency Amplifier. Pulse Step Modulation (PSM) based High Voltage Power Supplies (HVPSs) are widely used in fusion res...

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Bibliographic Details
Published in:Fusion engineering and design 2018-01, Vol.126, p.59-66
Main Authors: Patel, Amit, Dhola, Hitesh, Upadhyay, Dishang, Mehta, Kush, Goswami, Niranjanpuri, Singh, N.P., Raval, Bhavin, Dave, Rasesh, Gajjar, Sandip, Gupta, Vikrant, Thakar, Aruna, Rajnish, Kumar, Soni, Dipal, Varma, Sriprakash, Singh, Raghuraj, Trivedi, Rajesh, Mukherjee, Aparajita, Baruah, Ujjwal
Format: Article
Language:English
Subjects:
Amplifiers
Cyclotrons
Electric potential
Electric power supplies
Fiber optics
High voltage power supply
High voltages
Modular structures
Multi-secondary transformer
Neutral beams
Optical fibers
Particle accelerators
Power supply
Pulse step modulation
Radio frequency
Radio frequency amplifier
Receivers & amplifiers
Sensors
Switched power supply module
Transmitters
Voltammetry
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Summary:•Plasma Heating and current dive.•High Voltage Power Supply.•Pulse Step Modulation.•Multi-secondary transformer and switched power supply modules.•Tetrode and Diacrode based Radio Frequency Amplifier. Pulse Step Modulation (PSM) based High Voltage Power Supplies (HVPSs) are widely used in fusion research and other applications viz. broadcast transmitters, particle accelerators and neutral beam injectors because of inherent advantages of modular structure, high accuracy and efficiency, low ripple and fast dynamics. Typical Ion Cyclotron Radio Frequency (IC RF) system composed of cascaded connection of Driver stage (130 kW RF output) and End stage (1500 kW RF Output) would need two power supplies. A novel concept of tapping two outputs from single PSM based HVPS is attempted for the first time. PSM based 3 MW HVPS is developed with dual output to feed anode voltage of Driver (up to 18 kV) and Final Stage (up to 27 kV). Controller for the HVPS is designed to suit requirements during local operation and remote operation. In Local operation mode, protection interlocks with in the HVPS are integrated while remote mode has additional interlocks from IC RF Amplifiers system. Field integration of the controller is achieved through fiber optical links to avoid Electro-Magnetic interferences. Present article discusses initial experience of dual output HVPS with IC RF amplifiers, pre-integration validation campaigns including qualification for energy limits. The paper also presents the performance of HVPS at full rated capacity of 2800 kW continuous duty to support 1.5 MW IC RF system.
ISSN:0920-3796
1873-7196
DOI:10.1016/j.fusengdes.2017.10.028