Conveners
Poster - Charged Particle Beams and Accelerators and High Energy Density Plasmas and Applications
- Alexander Velikovich (Plasma Physics Division, Naval Research Laboratory)
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Ms Ellen Robertson (Virginia Tech)27/06/2019, 16:003.1 Plasma, Ion and Electron SourcesPoster
Governments and corporations around the world have billions of dollars of assets in Low Earth Orbit (LEO). It is, therefore, valuable to analyze the environment, including the thermal ions, in LEO. These thermal ions are critically important to establishing the “ground” potential for all elements of the spacecraft electrical system. Before instruments are launched to make such measurements,...
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Ben Ulmen (Sandia National Laboratories)27/06/2019, 16:003.1 Plasma, Ion and Electron SourcesPoster
X-ray and particle beam source designs at the Saturn accelerator would greatly benefit from a better understanding of the power flow in the center vacuum section. The Chicago particle-in-cell (PIC) code has been used to create a model of the insulator stack-MITL-diode system to attempt to match simulations to experimental B-dot current data. The stack voltage waveforms for the different MITL...
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Dr Andrey Kazakov (Tomsk State University of Control Systems and Radioelectronics)27/06/2019, 16:003.1 Plasma, Ion and Electron SourcesPoster
The pulsed low-energy (up to 15 keV) forevacuum plasma-cathode electron sources, operating at pressures 3-30 Pa, provide direct processing of dielectric materials (ceramics and polymers) due to compensation of negative charge on the dielectric surface by beam-produced plasma and by non-self-maintained discharge between charged surface of the dielectric and a grounded vacuum chamber. In...
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Dr Denis Zolotukhin (The George Washington University)27/06/2019, 16:003.1 Plasma, Ion and Electron SourcesPoster
A plasma source of a ribbon electron beam for electron beam generating with a cross section of 10*250 mm in the fore-vacuum region of pressure was created. The cathode was a rectangular cavity with an extended slit. To increase the uniformity of the electron beam current distribution, a multi-aperture extraction system was used. A part of the anode, facing the extractor, contained 60 holes...
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Dr Juan Caneses (Oak Ridge National Laboratory)27/06/2019, 16:003.1 Plasma, Ion and Electron SourcesPoster
The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a linear plasma device located at Oak Ridge National Laboratory which serves as a test-stand to develop the plasma source concept for the Materials Plasma Exposure eXperiment (MPEX). Recent experiments have demonstrated the heating of electrons via Electron Bernstein Waves (EBW) in this linear configuration using 28 GHz...
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Palak Jain (University of Padova and Consorzio RFX)27/06/2019, 16:003.1 Plasma, Ion and Electron SourcesPoster
SPIDER is the full-size prototype of ITER Neutral Beam Injector ion source, in operation since June 2018 as a project of the ITER Neutral Beam Test Facility located at Padova, Italy. It consists of an inductively coupled plasma source and an extraction system to accelerate the produced negative ions up to 100 keV energy. The plasma source is composed of 8 drivers, operated in low hydrogen gas...
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Varun . (CSIR- CEERI, Pilani, India and AcSIR, Ghaziabad, India)27/06/2019, 16:003.1 Plasma, Ion and Electron SourcesPoster
Pseudospark discharge has attracted significant attention for the generation of high density, energetic and high brightness electron beams with fast current rise for the growing applications on extreme ultraviolet and X-ray radiation source, microwave and THz radiation generation, surface modification, etc. [1-2]. In this work, the investigation has been carried out for the generation and...
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Adam Croteau (Boise State)27/06/2019, 16:003.1 Plasma, Ion and Electron SourcesPoster
Cold atmospheric pressure (CAP) plasma has been shown to kill bacteria and destroy biofilms through reactive etch and sputter activity and could be used on industrial surfaces in the food processing industry where microbial contaminants are a source of food-borne illness. Our group has developed a parallel plate plasma source using embedded electrodes. Results have demonstrated that our...
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Dr Chang-Seung Ha (Korea Electrotechnology Research Institute)27/06/2019, 16:003.1 Plasma, Ion and Electron SourcesPoster
Atmospheric-pressure plasma sources have been intensively studied because of their various industrial applications. Especially atmospheric pressure plasma has a strong potential for biomedical and surface treatment applications. In this paper, we report properties of the energy-controlled atmospheric pressure plasma. The independent control of the voltage and the discharge current is suggested...
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Tim Ziemba27/06/2019, 16:003.1 Plasma, Ion and Electron SourcesPoster
Eagle Harbor Technologies (EHT), Inc. is developing radio-frequency (RF) solid-state switching power supplies without the need for a 50-ohm matching network. The ability to remove the 50-ohm matching network from RF plasma generation systems significantly simplifies the design while allowing for a faster response time to changing plasma conditions. This system takes advantage of EHT’s...
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Mr Enbo Yang (University of Missouri)27/06/2019, 16:003.1 Plasma, Ion and Electron SourcesPoster
A portable X-ray generator for plant root imaging is being developed. The generator mainly includes a Cockcroft-Walton DC high voltage generator, which provides a high voltage DC bias to an x-ray diode, and a metallic target to convert the electron beam into X-rays. A backscatter imaging technique is used, where X-rays are projected onto the plant target (the roots buried in soil), and Compton...
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Emil Petkov (Naval Research Laboratory)27/06/2019, 16:003.1 Plasma, Ion and Electron SourcesPoster
The study of electron beam generation in a dense plasma focus (DPF) can yield insight into the physical mechanisms that lead to the formation of electron beams in pinched plasmas. A detailed understanding of these mechanisms may enable the production of a high-intensity x-ray source for various applications. Plasma polarization spectroscopy (PPS) is a novel diagnostic tool that will be...
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Dr Raymond Allen (NRL)27/06/2019, 16:003.1 Plasma, Ion and Electron SourcesPoster
Several experiments have shown that the anode initiates breakdown of vacuum gaps in cases where the anode and cathode field enhancements are approximately equal.1 The previous understanding was that only explosive emission at the cathode initiates breakdown between metal electrodes in vacuum with nanosecond pulses. Past experiments have shown clear evidence of particles from the anode...
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Dr Jacques Gardelle (CEA)27/06/2019, 16:003.2 Intense Electron and Ion BeamsPoster
Effects of the electron beam parameters on hydrodynamic response of aluminum: measurements and simulations.
J. Gardelle, B. Bicrel, B. Cassany, A. Galtié, D. Hébert and N. Szalek.
CEA/CESTA, 15 avenue des Sablières, CS 60001, 33116, Le Barp, France
The study of the dynamical response of material under shocks produced by electrons requires a good knowledge of these when they interact with...
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Dr Bruno Cassany (CEA)27/06/2019, 16:003.2 Intense Electron and Ion BeamsPoster
PROPAGATION OF ELECTRON BEAMS IN GAS CELLS
B. Cassany, D. Hebert, J. Gardelle, P. Modin, N. Szalek,
CEA/CESTA, CS 60001, 33116 Le Barp, FranceK. Bell, C. H. Moore, B. Medina, M. Bettencourt
Sandia National Laboratories
Albuquerque, NM 87185 USAIn this work, we present the first results of joint Sandia National Laboratories (SNL) and CESTA experiments where electron beams are produced...
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claude fourment (CEA-CESTA, Le Barp, F-33116 France)27/06/2019, 16:003.2 Intense Electron and Ion BeamsPoster
In the framework of X-Ray Flash Radiography, we investigate the propagation of an intense (2 kA), pulsed (60 ns) relativistic (4 MeV) electron beam (REB) through a cold plasma. The REB electrons interact with the plasma through binary collisions and collective response, whose importance depends on the ratio of plasma over beam density. Under some conditions, the collective response induces...
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Yang Zhou (Michigan State University)27/06/2019, 16:003.2 Intense Electron and Ion BeamsPoster
Photoemission is one of the fundamental processes to produce electron beams and is important to particle accelerators, electron microscopy, and vacuum electronics [1]. Recently, an analytical model for photoelectron emission from metal surface illuminated by a laser field was developed, by solving the time-dependent Schrödinger equation exactly [2, 3]. The model includes the effects of dc...
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Mr Nathan Joseph (Sandia National Laboratories)27/06/2019, 16:003.2 Intense Electron and Ion BeamsEither
The Saturn accelerator was commissioned in 1987 as a 5.4 MJ, 2.7 MV flash x-ray machine that delivers 750 kJ at 2.1 MV to a three-ring Bremsstrahlung (BREMS) diode with a peak power of 25 TW and FWHM pulse width of 40 ns. In December of 2017 and June of 2018 experiments were conducted using varying numbers of Saturn pulsed power modules connected to one of the three Saturn parallel BREMS...
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Brandon Medina (Sandia National Labs)27/06/2019, 16:002.5 Codes and ModelingPoster
As part of a continued validation effort for Sandia’s new plasma code, EMPIRE, we have modeled and are simulating the RKA beam experiment. Specifically, we have improved previous simulations of the RKA diode by using input parameters that more closely match the experiment and implementing Space Charge Limited (SCL) emission from the cathode velvet into EMPIRE. Moreover, we have begun...
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Yao Du (North Carolina State University)27/06/2019, 16:002.5 Codes and ModelingPoster
Ion energy distribution function (IEDF) plays a significant role in numerous plasma enhanced manufacturing processes in the semiconductor industry. To measure the IEDF, retarding field energy analyzers (RFEA) have been widely used. To extend the capability of measuring higher ion energies and minimize impact on manufacturing processes, a traditional RFEA was redesigned and embedded in the...
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Zhixing Gao (China Institute of atomic energy)27/06/2019, 16:004.1 Fusion (Inertial, Magnetic and Alternate Concepts)Poster
Improvement of Heaven-I high power excimer laser facility for ICF study
Zhixing Gao, Jing .Li, Zhao Wang, Fengming Hu, Baoxian Tian, Ze Lu
China Institute of Atomic Energy, Beijing 102413, ChinaThe recent works on Heaven-I KrF laser facility was introduced to improve the performance of E-beam pumped laser for ICF study. The technique of EFISI had been used to improve the...
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Mrs Jing Li (China Institute of atomic energy)27/06/2019, 16:004.1 Fusion (Inertial, Magnetic and Alternate Concepts)Poster
Auto-collimation and monitoring of KrF laser beam in the E-beam pumped high power excimer laser facility
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Jing li, Fengming Hu, Zhixing Gao, Zhao wang, Baoxian,Tian
(China Institute of Atomic Energy, Beijing, 102413)
Abstract:
The characters of the laser beam, such as the aiming precision and irradiation intensity on target, are important for the laser-matter interaction study. To ensure the... -
Smruti Ranjan Mohanty (Centre of Plasma Physics- Institute for Plasma Research, Sonapu)27/06/2019, 16:004.1 Fusion (Inertial, Magnetic and Alternate Concepts)Either
Portable and cheap neutron sources are in demand for various applications such as cancer therapy, fusion material study, explosive materials etc. Among various neutron sources, inertial electrostatic confinement fusion (IECF) is an extremely simple device that produces neutron yield typically ~ $10^{8}$ DD n/s. IECF is basically a fusion concept where the lighter fuel ions (deuterium, tritium)...
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Dr Sunggug Kim (NFRI (Natinal Fusion Research Institute))27/06/2019, 16:004.1 Fusion (Inertial, Magnetic and Alternate Concepts)Poster
Electron cyclotron heating (ECH) is used as one of the most important auxiliary heating method for plasma heating in modern fusion research. In addition to plasma heating, EC system is used for plasma current drive and control of plasma instabilities such as NTM (Neoclassical Tearing Modes). ECH (Electron Cyclotron Heating) system for KSTAR (Korea Superconducting Tokamak Advanced Research) is...
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Matthew Myers (U.S. Naval Research Laboratory)27/06/2019, 16:004.1 Fusion (Inertial, Magnetic and Alternate Concepts)Poster
The U.S. Naval Research Laboratory has converted the repetitively pulsed Electra krypton fluoride (KrF) laser system to an electron-beam (e-beam) pumped argon fluoride (ArF) laser. Operating at 193 nm, ArF has the potential of being the most efficient excimer laser and is a good candidate for an inertial confinement fusion (ICF) driver. The shorter ultraviolet wavelength increases energy...
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Christine Roark27/06/2019, 16:004.1 Fusion (Inertial, Magnetic and Alternate Concepts)Poster
The Dense Plasma Focus (DPF) is a compact coaxial pulsed plasma source of radiation, especially neutrons. Researchers have known for some time that a DPF will produce more neutrons than one would expect from a purely thermal fluid prediction [S. Lee and S. H. Saw, Appl. Phys. Lett. 92, 021503 (2008)], and therefore the most accurate DPF simulations take into account kinetic effects [A....
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R. Williams (Florida A. & M. University)27/06/2019, 16:004.1 Fusion (Inertial, Magnetic and Alternate Concepts)Poster
The Spheromak Turbulence Physics Experiment (STPX), a new large diameter (1.5 m) gun injected spheromak confinement system, has been constructed recently at FAMU for use originally in studying equilibrium, reconnection, turbulence, dust transport, and astrophysical phenomena, and for diagnostic probe development. We present details on its design, construction, operation, performance...
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Dr Jason Cassibry (University of Alabama in Huntsville)27/06/2019, 16:004.1 Fusion (Inertial, Magnetic and Alternate Concepts)Poster
The Pulsed Fission-Fusion Engine (PuFF) propulsion concept combines utilizes targets of fission and fusion fuel layers compressed and heated by a pulsed z-pinch driver. Fusion may provide the neutron seed to ignite the fission fuel, which in turn provides fission fragment heating to sustain the fusion reactions. The propulsion system utilizes a z-pinch to compress PUFF targets. Thermal...
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Mr Ian Allfrey (TAE Technologies, Inc.)27/06/2019, 16:004.1 Fusion (Inertial, Magnetic and Alternate Concepts)Poster
To achieve the goal of fusion TAE Technologies developed the C-2W experiment, an advanced beam-driven field-reversed configuration (FRC), which is the world’s largest compact toroid device. It is a linear system which consists of two theta-pinch formed FRCs, translated and merged in a confinement vessel. Each of C-2W’s Formation sections consists of two sets of magnets. First, a rotating...
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Varun . (CSIR- CEERI, Pilani, India and AcSIR, Ghaziabad, India)27/06/2019, 16:004.3 Radiation Physics & X-ray LasersPoster
Extreme ultraviolet (EUV)/soft X-ray radiations are highly important in the growing areas of surface modification of polymers for biocompatibility improvements, radiography of small objects for potential biological applications, etc. [1-2]. In this work, theoretical and plasma simulation studies have been presented for the generation of EUV/soft X-ray radiations from the pseudospark discharge...
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Dr Sergey Efimov (Physics Department, Technion )27/06/2019, 16:004.4 High Energy Density MatterPoster
Experimental observation of aluminum (Al) combustion realized in microsecond timescale under-damped underwater electrical explosion of Al wire is presented. Experiments were carried out using pulse power generator with peak current ~220 kA and rise time of ~1.6 µs. Using time-resolved spectroscopy, absorption bands of AlO oxide was obtained in the case of Al wire explosion with diameter <0.6...
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Toru Sasaki (Nagaoka University of Technology)27/06/2019, 16:004.4 High Energy Density MatterPoster
We have demonstrated a thin liquid-metal load for repeatable applications using pulsed-power discharge. To understand the liquid-metal behavior, we measured the liquid-metal diameter as a function of hydrodynamical normalized number. We found that the length and diameter of liquid-metal can use the hybrid X-pinch system. To demonstrate the thin liquid-metal load, we used a pulsed-power system...
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Franklin Fierro (Los Alamos National Laboratory)27/06/2019, 16:004.4 High Energy Density MatterPoster
Target machining using datum point tooling for
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Precision High Energy-Density Liner Implosion Experiment (PHELIX) magnetic implosion system
Franklin Fierro, Patrick M. Donovan, John C. Lamar, Jeff Griego, Randall B. Randolph, Christopher L. Rousculp
Los Alamos National Laboratory
Los Alamos NM, 87545
Cylindrical driven shock experiments examining damaged surface hydrodynamics and... -
Ahmed Elshafiey (Cornell University)27/06/2019, 16:004.4 High Energy Density MatterPoster
We are planning detailed spectroscopic studies of the X-ray bursts produced by hybrid X-pinches using ~20 ps time resolution X-ray streak cameras. The purpose is to investigate whether radiative collapse occurs in the micropinches that produce the X-ray bursts. In order to do that, we want 1 strong X-ray burst from the hybrid X-pinch at a time that is reproducible within ± 1 ns. As a first...
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M. Gilmore (University of New Mexico)27/06/2019, 16:004.4 High Energy Density MatterPoster
The electrothermal instability (ETI) is a Joule heating-driven instability that can initiate in the solid state in solid liner-driven fusion. In the solid state, the ETI generates azimuthally correlated (striated) temperature and density perturbations. These striations may seed the magneto Rayleigh-Taylor (MRT) instability, which has been shown to limit stagnation pressure and fusion yield....
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Shingo Kusano (Nagaoka university of technology)27/06/2019, 16:004.4 High Energy Density MatterPoster
Physical properties of a guiding cone for fast ignition in an inertial confinement fusion system are one of the key issues to understand the behavior of laser-generated fast electrons. The guiding cone will be changed from a solid state to a region of warm dense matter (WDM) irradiated by an intense-laser. The conversion efficiency, which is defined by the ratio of the energy of fast electrons...
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Mr Vasily Pozdnyakov (Institute of Product and Process Innovation, Leuphana University of Lueneburg, Germany)27/06/2019, 16:004.5 Laser Produced PlasmasPoster
Laser shock peening (LSP) is a widely known technique, which is used in industry to improve the properties and performance of metallic components. Laser induced compressive residual stresses (RS) allow to enhance the fatigue life of aircraft structures [1]. Due to deeper depth and higher magnitude of RS in the target material, this technique is a potential substitute of the conventional...
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Varun Tangri (Research Support Instruments)27/06/2019, 16:004.6 Fast Z PinchesPoster
Till recently, measurements of the magnetic field in gas-puff z-pinch implosions were limited to low density and temperatures typically found at very early times and outside the pinch radius ( $r\ge9$ mm and $t\le-90$ ns). However, recent, more accurate measurements at higher densities and temperatures at various R and Z-locations on the generator at the Weizmann Institute of Science (WIS)...
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Mr Zhenyu Wei (Xi'an Jiaotong University)27/06/2019, 16:004.6 Fast Z PinchesPoster
Fast linear transformer drivers (FLTDs) are a rapidly developing field of pulsed-power technology in recent years, which is used to output high-power, high-current pulses. However, an FLTD on terawatt level usually contains more than thousands of switches. As a result, the fault of self-discharge of switches is common in FLTDs. This brings a. important problem that when self-discharge occurs,...
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Mr Yihan Lu (Xi'an Jiaotong University)27/06/2019, 16:004.6 Fast Z PinchesPoster
Experiments of two-wire Z-pinches are carried out, in which an adjustable current prepulse is introduced to preheat the wires before the main current start. Experimental results show that the time delay (Tdelay) between the prepulse and the main pulse has a fatal effect on the ablation behavior and the dynamic of implosion.
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The two-wire load is heated to a core-corona state by the prepulse... -
Dr Thomas Awe (Sandia National Laboratories)27/06/2019, 16:004.6 Fast Z PinchesPoster
The electrothermal instability (ETI) is driven by Joule heating and arises from the dependence of resistivity on temperature. When a metal is Joule heated through the boiling point, ETI may drive azimuthally correlated surface density variations or “strata” which provide the dominant seed for subsequent growth of the magneto Rayleigh-Taylor (MRT) instability. Simulations of z-pinch...
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Robert Masti, Dr Bhuvana Srinivasan (Virginia Tech)27/06/2019, 16:004.6 Fast Z PinchesPoster
Recent results from experiments of magnetically-driven pulsed power solid
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liners have exhibited electrothermal instability (ETI) growth early during
the phase transitions of the conductor. Understanding the development of
these instabilities and potential stabilization mechanisms could play a sig-
nificant role in the success of fusion concepts such as MagLIF (Magnetized
Liner Inertial... -
Thomas Schmidt (University of New Mexico), Dr M. Gilmore (University of New Mexico)27/06/2019, 16:004.6 Fast Z PinchesPoster
Millimeter-wave radiometer and coherent Thomson scattering diagnostics are being developed in order to characterize radiated power and turbulent density fluctuations in pinch plasmas in the COBRA accelerator at Cornell University. The purpose of these measurements will be to study the overall power balance in COBRA plasmas under various conditions. An initial radiometer channel will operate in...
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Seth Kreher (University of Nevada, Reno)27/06/2019, 16:004.6 Fast Z PinchesPoster
The magnetic field diffusion into a conductor driven by intense pulsed power is of interest for current-driven instabilities such as the electrothermal instability (ETI). ETI is thought to develop on the surface of a conductor due to uneven ohmic heating and variation in resistivity that follows the spatial distribution of the current density as impacted by surface roughness and inclusions....
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Dr Vasily Geyko (Lawrence Livermore National Laboratory)27/06/2019, 16:004.6 Fast Z PinchesPoster
Z-pinch is known to be unstable due to MHD kink ($m=1$) and sausage ($m=0$) modes [1]. Recent experiments demonstrated that these modes can be stabilized by a radially sheared axial flow [2]. Typical MHD models are usually unable to adequately describe evolution of short wave length modes as they ignore finite ion gyroradius $\rho_i$ effects. Gyrokinetic simulations of the $m=0$ mode performed...
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R. H. Dwyer (University of New Mexico)27/06/2019, 16:004.6 Fast Z PinchesPoster
The PBEX (Plasma Bubble Expansion eXperiment), being conducted on the University of New Mexico’s HelCat (Helicon-Cathode) basic plasma science device, utilizes a coaxial plasma gun to launch plasma jets and bubbles (spheromaks) into lower density magnetized plasmas. The goal of these experiments is to study the dynamics of magnetic relaxation processes in the presence of background plasma. ...
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Dr Niansheng Qi (Cornell University)27/06/2019, 16:004.6 Fast Z PinchesPoster
The Zeeman splitting of visible spectral lines is measured to infer the magnetic field and current profiles in gas puff z-pinches. In high current (>1MA) z-pinches, the plasmas are highly ionized and most of the emitted photos are in XUV or x-ray region. It is difficult to apply the Zeeman splitting spectroscopy there because there are not many detectable visible lines. We have identified...
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G.S. Jaar (Florida A&M University)27/06/2019, 16:004.6 Fast Z PinchesPoster
Emission spectra from a microsecond x-pinch were studied in the soft x-ray region which give information about the radiating hot spot plasma. The spectra were collected using a flat crystal spectrometer from aluminum and molybdenum in a 2x25 µm wire x-pinch configuration. We present results that show aluminum reaching the hydrogen-like state and molybdenum reaching the neon-like charge state,...
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Joseph Engelbrecht (NRL)27/06/2019, 16:004.6 Fast Z PinchesPoster
The 650 kA Hawk pulsed power generator at NRL has been configured as a fast (1.2 μs), high inductance (607 nH) driver for a dynamic dense plasma focus load. The current pulse is initiated in a deuterium plasma that is injected radially by three Marshall guns. This plasma is accelerated through a coaxial region, and pinches onto neutral deuterium injected axially by a gas-puff valve. Promising...
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Akash Shah27/06/2019, 16:004.6 Fast Z PinchesPoster
The Z-machine housed at Sandia National Laboratories is instrumental in plasma physics research across a range of applications. University-scale z-pinch experiments, such as gas-puff z-pinches, can inform the high-value experiments conducted at Sandia. A gas puff z-pinch requires gas to be puffed into the region between two electrodes, which is then pulsed with a high voltage [1]. The gas is...
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Dr Kobi Cohen (Rafael Advanced Defense Systems LTD.)27/06/2019, 16:004.6 Fast Z PinchesPoster
Diagnostics of pulse-power systems is a challenging experimental task. The high electric and magnetic fields that are usually involved in their operation can interfere the measurement, and moreover, can damage sensitive electronic data acquisition systems. Optical fibers, being almost immune to electric noise pick-up, are thus favorable as gauges or transmission lines in noisy systems.
In...
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Jakub Cikhardt (Czech Technical University in Prague)27/06/2019, 16:004.6 Fast Z PinchesPoster
In order to study the mechanisms of deuteron acceleration and neutron production, deuterium gas-puff z-pinch experiments are performed at the terawatt-class GIT-12 generator. In these experiments, during the stagnation of z-pinch implosion at a time of about 700 ns, the generator current achieves approximately 3 MA. After a relatively stable implosion, the disruption of the z-pinch by...
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Joseph Strehlow27/06/2019, 16:004.2 Particle Acceleration with Laser and BeamsPoster
A super-intense laser pulse, incident on a thin foil target, can create plasma structures with accelerating fields on the order of TV/m, accelerating ions to multi-MeV energies. The 10$^{20}$ W/cm$^{2}$, linearly polarized Texas Petawatt Laser (TPW) facility was employed to accelerate high energy titanium ions from ultrathin (60 to 200 nm) planar titanium foil targets. A clear optimum target...
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Bruce Cohen (Lawrence Livermore National Laboratory)27/06/2019, 16:002.5 Codes and ModelingPoster
We are developing the Topanga code for predicting E3 electromagnetic pulse building on our experience with hybrid plasma simulation. The E3 component has a long pulse, lasting tens to hundreds of seconds. It is caused by the nuclear detonation's temporary distortion of the Earth's magnetic field. The E3 component has similarities to a geomagnetic storm caused by a solar flare. Like a...
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Michael Mallon (University of the Bundeswehr Munich), Marina Kühn-Kauffeldt (Universität der Bundeswehr München)27/06/2019, 16:001.2 Computational Plasma Physics;Poster
The use of stark broadening in plasma diagnostics is a common tool to derive information about electron density and temperature distributions. In contrast, only limited theoretical work is available, which can be used to interpret experimentally acquired spectra. Current ab initio models do not give a sufficient explanation on the driving effect of radiation interaction with the plasma...
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Mladen M. Kekez (High-Energy Frequency Tesla Inc.)27/06/2019, 16:008.4 Pulsed Power for LasersPoster
This paper describes three sets of experiments regarding the generation and propagation of nitrogen emission at 337.1 nm. 8 stage PFN (Pules forming network) Marx generator was used in the first set of experiments. The generator of 50 Ω internal impedance produces a “square” shaped voltage waveform across 50 Ω resistor. When the generator is applied to the experimental setup, the glow-like...
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