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Georgios Tsolaridis (ETH Zurich)19/06/2017, 15:00High Power ElectronicsOral
Various modern applications like fusion reactors for plasma generation, beam deflecting equipment in accelerators, equipment for magnetic resonance imaging (MRI) and test equipment for future HVDC breakers, require highly dynamic, high power pulsed current sources. Such current sources must provide a high current gradient combined with an ultra-low ripple and a stable operation under...
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Gennady Shvetsov (RAS)19/06/2017, 15:15High Power ElectronicsOral
The standard solid propellant fueled pulsed MHD generators with an electric power of 10–600 MW developed in the 1970-80s provided reliable autonomous power supply of various consumers. The time required for such MHD generators with self-excitation to reach the rated operating conditions is about one second. Recently new scientific, engineering, and technological results have been obtained that...
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Dr Mikhail Slepchenkov (Tri-Alpha Energy Inc.)19/06/2017, 15:30High Power ElectronicsOral
High voltage modulators (HVM) have been used widely for broadcast, medical, industrial and research applications. The most common modulation techniques for HVM are Pulsed Step Modulation, Coarse Step Modulation, PWM and their hybrid modifications.
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All these methods require a presence of PI-controller with additional Feedforward loop in control system to estimate a modulation index or duty... -
Dr Christopher Yeckel (Stangenes Industries)19/06/2017, 15:45High Power ElectronicsOral
Two parallel Marx generators drive the primary of a pulse transformer with the transformer secondary driving a Klystron as part of a novel system developed by Stangenes Industries. A parallel Marx topology is used to reduce the current contribution of each Marx to an acceptable level so as to not require an export-controlled switch. This allows the system freedom of commercial convenience....
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Mr liqing tong (Fudan University)19/06/2017, 16:15High Power ElectronicsOral
Nowadays, it is important to improve the power efficiency with the growing variety of environmental, biological, medical, and especially for homogeneous dielectric barrier discharges (DBD) industry application using a repetitive high-voltage solid-state Marx generator. However, most solid-state pulse generators are action at hard switching on or off, such as a huge current for the DBD load,...
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Mr Zhen Li (Tsinghua University)19/06/2017, 16:30High Power ElectronicsOral
In an Inductive Pulse Power Supply (IPPS), when the inductors are charged and discharged, they face different capacitive loads, i.e. the frequencies of charging and discharging are different. According to our experiences, inductors’ inductances and resistances may change with frequencies. If constant inductance and resistance for one inductor are used in simulation, errors may occur. So it is...
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Dr Bruno Cassany (CEA (FR))19/06/2017, 16:45High Power ElectronicsOral
In the framework of a collaboration, CEA and CERN are working on an air insulated solid state pulse modulator to drive LEETCHI electron gun, source of future high current, long pulse RF accelerator. The requirements are pulses in the range of 140kV (1% flat top), 10A, 150μs width, at a repetition rate up to 50Hz and a reproducibility pulse-to-pulse better than 10-3. The proposed modulator is...
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Dr Xavier Bonnin (CERN)19/06/2017, 17:00High Power ElectronicsOral
In the framework of the CLIC project at CERN, the team in charge of the study of the klystron modulators faces new challenges to achieve high precision and repeatable pulses. This challenge consists in generating precise and repeatable pulses of 140µs at 50Hz. The pulsed power is 30MW at a voltage of 180kV.
This paper presents the study and the evaluation of a new hybrid bouncer circuit. It...
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