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Mr Yi Zhao (Xi'an Jiaotong university )06/06/2018, 13:30Poster Presentation
As the key equipment of power plants and substations, Transformers carry heavy responsibility of power transmission, distribution and transformation of voltage levels. Recent years, with the construction of UHV projects, the highest voltage level in China has increased to more than 1000kV and has formed several UHV networks, enhancing the reliability and efficiency of power supply. However,...
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06/06/2018, 13:30Poster Presentation
In the framework of the LHC Injector Upgrade (LIU) project, the Proton Synchrotron Booster (PSB) at CERN will be upgraded to receive 160 MeV H– beam from the new linear accelerator LINAC4. During the injection process the two electrons of the H– ions are removed with a stripping foil and the resulting protons are injected into the ring on a machine orbit locally bumped with four...
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06/06/2018, 13:30Poster Presentation
Recent experiments at Sandia National Laboratories have been focused on understanding the physics of power flow in the magnetically insulated transmission lines (MITLs) at the Z Pulsed Power Facility. One outstanding question is determining time-dependent current loss for both ions and electrons in the Z inner MITLs. To answer this question, we have developed a novel velocimetry based...
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06/06/2018, 13:30Poster Presentation
Utilization of nanosecond pulsed electric fields (nsPEFs) has been widely studied as a novel approach to induce cellular stress for biological and medical applications. Endoplasmic reticulum (ER) stress has become to be considered as a cause of diseases as diabetes mellitus, Parkinson's disease, and so on. The objective of this study is to activate the ER stress response, which is a built-in...
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06/06/2018, 13:30Poster Presentation
The high stability flat-top pulsed magnetic field has both high field strength and high field stability simultaneously. That is necessary for some high precision scientific experiment, for example, nuclear magnetic resonance (NMR) and heat specific measurement, whose resolution of experimental data is closely related to both field strength and field stability.
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In this paper, an innovative method... -
Dr Jose Rossi (National Institute for Space Research)06/06/2018, 13:30Poster Presentation
Nonlinear transmission lines (NLTLs) have been studied for application in aerospace radars, telecommunication, and medical devices. The radiofrequency (RF) pulses generated by the NLTLs can be radiated by antennas connected at the output of the lines. There have been relatively few articles that show experimental results regarding the transmission and receiving of RF signal generated by NLTLs...
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06/06/2018, 13:30Poster Presentation
For surface modification in industry, a dielectric barrier discharge (DBD) under atmospheric pressure with air as carrier gas is feasible and cost efficient, see [1]. However, a stable and reproducible plasma is required for industrial applications. To fulfil the industry specifications, the plasma ignition shall be analysed under the following aspects: pulse form, edge steepness, pulse width,...
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06/06/2018, 13:30Repetitive Pulsed Power Systems, Repetitive Pulsed Magnetics, Accelerators, Beams, High Power Microwaves, and High Power Pulsed AntennasPoster Presentation
The Virtual Cathode Oscillator (Vircator) is one of the methods to generate high power microwaves. Simplicity not needing external magnetic fields, and high-power capabilities are some of the advantages of Vircators. However, low efficiency is a serious problem. In the Vircator driven by ETIGO-IV generator, it is known that electron beam, 40% is lost at the mesh anode with transmittance of...
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06/06/2018, 13:30Poster Presentation
The Antiproton Decelerator (AD) at CERN uses a magnetic horn as a focusing lens to capture particles generated by shooting a proton beam into a target. It is powered by a capacitor bank discharge circuit generating current pulses with an amplitude of 400kA and a duration of 30µs. As part of the ongoing consolidation of the magnetic horn, a test-bench installation was built with an increased...
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06/06/2018, 13:30Poster Presentation
The transport of electron beams through moderate pressure gases is a challenging problem that involves beam evolution due to self fields and plasma generation through complex chemical pathways. The modeling of such experiments is made even more difficult due to low repetition rate, shot to shot variation, and large geometries. This work reports on the development and characterization of a...
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06/06/2018, 13:30Poster Presentation
There is a significant effort to measure current losses on the Z machine at different points along the magnetically-insulated transmission line (MITL). The convolute region is one of the key locations where models, measurements, and simulations say much of this current loss occurs. Positive ions comprise one component of this current loss in addition to electrons and negative ions crossing the...
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Andrew Fierro (Sandia National Laboratories)06/06/2018, 13:30Poster Presentation
In a high power vacuum insulated transmission line, a critical current must be reached such that magnetic insulation is obtained. Before this magnetic insulation, the threshold for vacuum field emission is reached leading to emission of electrons from the cathode. Additionally, the large conduction currents lead to Joule heating of the electrodes and subsequent sublimation of any impurities...
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06/06/2018, 13:30Poster Presentation
This paper presents the design and characterization of a compact, battery-powered, high-voltage impulse generator intended to produce nanosecond pulses for UWB applications. This system was developed in-house at the Army Research Laboratory and it consists of a +14.8-V to -30-kV charger and a -30-kV to +240-kV Marx generator circuit. The output of the 240-kV, 10-J Marx generator is used to...
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Hiromi Sato (Yamagata University)06/06/2018, 13:30Poster Presentation
A cancer treatment by an ultra-short pulse high electric field is one of new biological applications. This work focuses on the development of a high power nanosecond pulsed electromagnetic wave generator for the cancer treatment, and effect on a cancer cell by the developed device. We have developed a burst pulse generator that outputs the multiple pulses continuously by a NLTL (Nonlinear...
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06/06/2018, 13:30Poster Presentation
The LHC Injector Upgrade project aims at increasing the performance of the LHC injectors and includes the replacement of Linac2 by Linac4 as injector to the Proton Synchrotron Booster (PSB). In order to distribute the 160 MeV beam from Linac4 to the four rings of the PSB, a new distributor system has been built. The required five pulse generators have a pulse length ranging from 20 µs to 620...
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Mr Yuki Utsumi (Tokushima University)06/06/2018, 13:30Poster Presentation
Ozone has been used for several applications as sterilization and deodorization because of the strong oxidizing power with low environmental load. The efficient and high-concentrated ozone-generation technology has been required. Ozone generation using nanosecond pulsed power has a feature of high efficiency but not high concentration. We have adopted a thin reactor in the ozone generation to...
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06/06/2018, 13:30Poster Presentation
Cancer cell populations contain proliferating, quiescent, and dead cells that drive tumor growth and cancer metastasis based on the surrounding microenvironment [1]. Many existing cancer treatments are highly cytotoxic and predominantly target the proliferating cells, which drive cancer development [2]. This begs the question about whether electric pulses (EPs), which are under investigation...
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06/06/2018, 13:30Poster Presentation
Virtual cathode oscillator is a class of high power microwave source. The virtual cathode oscillator uses oscillation of virtual cathode formed behind the anode to generate high power microwave. In spite of its low efficiencies, the virtual cathode oscillator has been studied widely because of its simple structure and its availability of high voltage. To increase the efficiencies, various type...
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06/06/2018, 13:30Poster Presentation
We describe the experimental demonstration of a linear actuator and cylindrical motor which utilizes the controlled turn-less motor (CTM) principle discussed elsewhere in this conference. The technology combines low voltage high current inverters with turn-less electro mechanics and high power density batteries and micro channel coolers resulting in extremely high force density and power...
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06/06/2018, 13:30Poster Presentation
The gas temperature within a pin-to-pin air gap discharge created by nanosecond-pulsed high-frequency voltage pulses was studied via emission spectroscopy of the N2(C-B) state. The temperature evolution was studied over a burst series of 10 pulses with the frequency varying from 1 kHz to 250 kHz. Emission from each individual discharge was studied to determine the temperature associated with...
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Daniil Frolov (Fermilab)06/06/2018, 13:30Poster Presentation
Two pulsed power systems have been upgraded for the g-2 experiment at Fermilab. The Pbar Lithium Lens supply previously ran with a half sine pulsed current of 75 kA peak, 400 us duration and a repetition rate of 0.45 pps. For the g-2 experiment, the peak current was reduced to 25 kA, but the repetition rate was increased to an average of 12 pps. Furthermore, the pulses come in a burst of 8...
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06/06/2018, 13:30Repetitive Pulsed Power Systems, Repetitive Pulsed Magnetics, Accelerators, Beams, High Power Microwaves, and High Power Pulsed AntennasPoster Presentation
During the last two decades, HPM (High Power Microwaves) effects on systems such as electronic devices and sometimes biological samples have been studied in CEA/Gramat. These studies led to actual designs of several HPM generators, each corresponding to a specific technology or experimental area. This paper presents two high-sized electromagnetic simulators named Hyperion and MELUSINE.
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The... -
Mr Henry Gaus06/06/2018, 13:30Poster Presentation
This paper describes a high-speed imaging setup for capturing exploding detonators with short exposure time cameras. With three, commercially available, high intensity, pulsed xenon light sources (> 107 candela intensity) satisfactory image quality was achieved for a minimum exposure time. Beyond that the combined flash lamp output was too dim at desired shorter exposure times. As such, an...
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Yajun Zhao (Chongqing University)06/06/2018, 13:30Poster Presentation
Ablation outcome assessment is critical for confocal therapy. Irreversible electroporation (IRE) is a new emerging tumor treatment in recent years. The variation of the impedance has been proved the ability to reflect the treatment outcome of IRE. However, nowadays the impedance is mostly measured by the treatment electrodes which are used to apply pulses. The information obtained by that is...
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Dr Lauro Paulo Silva Neto (Federal University of São Paulo)06/06/2018, 13:30Poster Presentation
Nowadays Nonlinear Transmission Lines-NLTL have been studied for RF generation to be applied in different systems of communications such as satellite, military and biomedical applications. NLTL is built by using a network composed by inductors and capacitors, where at least one of these components need to have a nonlinear behavior. One limiting factor for applications is in the peak power...
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Renee Van Ginhoven (AFRL)06/06/2018, 13:30Poster Presentation
To understand effects of processing and surface chemistry on nanodielectric material properties, we study interaction of molecular species used in synthesis, functionalization, and suspension of BaTiO3 particles in solution. We investigate interaction of water with BaTiO3 using density functional theory (DFT) applied to slab configurations. Slabs meant to represent the environment of a...
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Dr Xupeng Chen (SLAC National Accelerator Lab)06/06/2018, 13:30Poster Presentation
Linac Coherent Light Source (LCLS) at SLAC has started to run since April, 2009 and is driven by eighty-four klystrons. Each klystron is powered by a line-type modulator with a high power thyratron as a switch. The thyratron life time has become an important concern since its invention. SLAC has accumulated thyratron life data in past long time operation. In this report, we will review the...
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06/06/2018, 13:30Poster Presentation
Surface flashover of insulators in vacuum has been investigated for decades, the most widely accepted mechanism for the process is secondary electron emission avalanche (SEEA) and the gases generated from surface discharge play a crucial role. In this paper, the flashover was excited by a microsecond single pulsed generator with a rise time of 500 ns and a full width at half maximum of 8 μs....
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06/06/2018, 13:30Poster Presentation
Electric pulses can effectively treat advanced, inoperable, chemo- and radiation-resistance cancers. This technique, known as electroporation, involves the application of high intensity, short duration (nanosecond (ns)) pulses. Depending upon the energy applied, which is a function of the magnitude, length, and number of pulses, one can potentially induce no membrane change, temporary...
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06/06/2018, 13:30Poster Presentation
Eagle Harbor Technologies, Inc. (EHT) is developing a low-cost, fully solid-state architecture for the pulsed RF heating systems and diagnostics at fusion science experiments. EHT has constructed and tested a high voltage inductive adder to drive gyromagnetic and diode-based nonlinear transmission lines (NLTLs). The inductive adder is capable of 35 kV output with a 10-ns rise-time into 50 Ohm...
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Christopher Wagner (Goethe University)06/06/2018, 13:30Poster Presentation
At the Frankfurt Neutron Source (FRANZ), it is intended to generate a neutron beam with energies up to 300 keV by a pulsed proton beam with the Li7(p,n) reaction. To prebunch the proton beam for FRANZ, a 6 kV chopper with a repetition rate of 256 kHz and a pulse width of 100 ns has been designed and build. The current pulse generator bases on transformers and therefore forms a clipped and...
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David Woog (CERN)06/06/2018, 13:30Poster Presentation
Several prototype inductive adders (IAs), for use with kicker systems, each with very different specifications, are under construction at CERN. Historically pulse generators for kicker systems use thyratrons and either a Pulse Forming Network (PFN) or a Pulse Forming Line (PFL). The IA has several advantages compared to these conventional pulse generators, including: the use of semiconducting...
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06/06/2018, 13:30Poster Presentation
The advanced beam-driven C2-W field-reversed configuration experiment [1] utilizes two, merging compact toroid’s, formed and accelerated by two theta-pinch formation systems. Two new pulse power systems (Bias and MR), configured in parallel were designed and built to drive current in 34 (17 pairs) formation coils. The total stored energy in 38 Bias power units is about 1.4 MJ and provide the...
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06/06/2018, 13:30Poster Presentation
Diversified Technologies, Inc. has developed a PEF (Pulsed Electric Field) system for processing fruits and vegetables by softening their tissue at the cellular level. This process, which applies short (microsecond scale), high voltage pulses to the product in a water bath / slurry, makes slicing, dicing, peeling, drying, and juicing easier, and saves substantial energy in these downstream...
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Dr Jose Rossi (National Institute for Space Research), Lauro Paulo Silva Neto (Federal University of São Paulo)06/06/2018, 13:30Poster Presentation
Nonlinear transmission lines (NLTLs) have been used with great success to generate high power radio frequency (RF). Generally, their operation consists of a lumped line based on the nonlinear behavior of the LC section components, capacitors or inductors, as a function of the applied voltage or current, respectively. However, considering high power signals, the employment of ceramic...
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06/06/2018, 13:30Poster Presentation
RF measurements, using previously published techniques, were made to determine the transverse impedance of a pillbox. The pillbox had near realistic physical dimensions of a cell being designed for a conceptual next generation multi-pulse linear accelerator. Details of the measurement techniques as well as comparison to analytical and simulated results will be presented.
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06/06/2018, 13:30Poster Presentation
UHVDC transmission system with hierarchical connection mode is a new trend. In this mode, the inverter station adopts the way of layered access to 1000 kV and 500 kV AC power grid, which can realize the optimization of UHVDC power transmission, improve the voltage support ability of the receiving end AC system and guide the reasonable distribution of power flow.
Insulation coordination is a...
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Daniil Frolov (Fermilab)06/06/2018, 13:30Poster Presentation
A fast travelling wave kicker operating with 80 MHz repetition rates is required for the new PIP-II accelerator at Fermilab. We present a technique to drive simultaneously four series-connected enhancement mode GaN-on-silicon power transistors by means of microwave photonics techniques. These four transistors are arranged into a high voltage and high repetition rate switch. Using multiple...
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06/06/2018, 13:30Poster Presentation
Spatially dispersive nonlinear transmission lines (NLTLs) have attracted interest as frequency tunable, wide-band, high power microwave (HPM) sources. The characteristics of these sources need to be further evaluated and understood to optimize their design. This paper presents the experimental performance of a spatially dispersive NLTL composed of Nickel-Zinc (NiZn) ferrites possessing a range...
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06/06/2018, 13:30Poster Presentation
In the framework of collaborations between the SIAME Laboratory of Pau University and the French Alternatives Energies and Atomic Energy Commission (CEA) on Marcoule Center, we are working on the improvement of an electrostatic precipitator (ESP) for gas cleaning.
The background of the present work was established during the past ten years. Several successive studies allowed improving...
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06/06/2018, 13:30Poster Presentation
Antibiotic resistance mechanisms render current antibiotics ineffective, necessitating higher concentrations of existing drugs, the development of new drugs, or the discovery of a method or mechanism to counter them [1]. Combining nanosecond electric pulses with tobramycin and rifampicin enhanced the cytotoxic effect for gram negative Escherichia coli, gram positive Staphylococcus aureus,...
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06/06/2018, 13:30Poster Presentation
Recently, improvements of drainage water treatment technology has been required. The streamer discharges generated by nanosecond pulsed power was applied to treat surfactant solution as a persistent chemical. Radicals with a high redox potential, such as especially hydroxyl radical, is expected for degradative treatment of the persistent chemical. The effects on production of hydroxyl radical...
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Dr Yeong-Jer Chen (NSWCDD)Repetitive Pulsed Power Systems, Repetitive Pulsed Magnetics, Accelerators, Beams, High Power Microwaves, and High Power Pulsed AntennasPoster Presentation
A low impedance modulator made up of ceramic-loaded parallel-plate transmission line sections in a Marx configuration has been developed as a test bed for high power microwave sources. The generator has configurable impedance between 15 and 25 ohms, pulse-width between 50 and 200 ns, and can operate at repetition rates up to 100 Hz with a 200 kW high voltage power supply. The energy stored in...
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