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Jul 8, 2024 | 
pubs.aip.org | Brian Haines |Samuel E. Wurzel |P. Rodriguez-Fernandez |J. Giuliani
Details of the initial conditions and plasma volume play an important role in evolution of the Z-pinch gas puff implosion.1 Some of the ways this can happen are (1) the initial density profile of the gas used at the time of initiation of discharge influences subsequent evolution, including instabilities; (2) the initial inductance and other circuit parameters influence the amount of power delivered to the plasma at any given time; and (3) the specific geometry of the chamber influences the...
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Jul 8, 2024 | 
pubs.aip.org | Aeronomic Research |Brian Haines |Samuel E. Wurzel |P. Rodriguez-Fernandez
For n 1 ≠ n 2, we have at z = 0 δ P 1 − e n 1 δ ϕ = δ P 2 − e n 2 δ ϕ ,(30)and hence δ P 1 − δ P 2 = e ( n 1 − n 2 ) δ ϕ . (31)Equations (27) and (31) show that δP is continuous at z = 0 for n1 = n2 and no electric field is generated—this result is consistent with the boundary condition for the pressure at the interface z = 0 in zero surface tension fluid. When n 1 ≠ n 2, the KHI generated electron velocity flows lead to the electron accumulation or depletion at the interface z = 0.
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Jul 3, 2024 | 
pubs.aip.org | P. Rodriguez-Fernandez |Brian Haines |Samuel E. Wurzel |M. Granetzny
Topics Laser induced fluorescence, Particle accelerators, Plasma waves, Plasmas Helicons are bounded whistler waves, typically at tens of megahertz for hundreds of Gauss of magnetic field, which are currently being considered for applications in space thrusters,1 fusion materials testing,2 and wakefield accelerators.3 Wakefield accelerators are capable of generating accelerating electric fields well in excess of 100 GV/m.4 The accelerating gradient in a plasma accelerator is limited by the...
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Jul 2, 2024 | 
pubs.aip.org | P. Rodriguez-Fernandez |Brian Haines |Samuel E. Wurzel
Topics Electronic transport, Electric fields, Radiowave and microwave technology, Plasma confinement, Plasma devices, Plasma dynamics, Plasma properties and parameters, Plasma sheaths, Plasma sources Inductively coupled or wave-coupled plasmas operating within diverging static magnetic fields, called magnetic nozzles, convert the enthalpy of electrons into the kinetic energy of ions.1 As plasmas can be accelerated without electrodes, these devices offer a prolonged lifetime, making them...
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Jul 2, 2024 | 
pubs.aip.org | Laser Microfusion |P. Rodriguez-Fernandez |Brian Haines |Samuel E. Wurzel
The simulation session scheme consisted of the following stages: Using the GEM_MP.exe code (see Appendix A) as input data information describing the Te(R,Z) and ne(R,Z) profiles (2D tables) and data describing diagnostic parameters (3D pixel positions and pinhole information about their sizes and the presence or absence of additional filters in the detector's viewing path), the number of quanta that reach each of the 33 462 pixels of the detector is calculated.
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Jul 1, 2024 | 
pubs.aip.org | Brian Haines |P. Rodriguez-Fernandez |S. Krüger |V. I. Berezhiani
A relativistically hot plasma, exposed to intense radiation, experiences a higher radiation pressure force compared to a cold plasma. The phenomenon known as the “Compton Rocket” was originally discovered by O'Dell.1 In O'Dell's work, the force acting on the plasma was derived using a phenomenological, test-particle approach. Energy-momentum conservation is employed to address particle–photon interaction, and the resulting force is integrated over the distribution function.
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Jun 21, 2024 | 
pubs.aip.org | Beijing Normal |Brian Haines |P. Rodriguez-Fernandez |S. Krüger
Research on plasma-based acceleration (PBA) has made great progress during the past few decades.1 Much of this effort has been motivated to build a considerably less expensive and more compact next generation linear collider (LC) or an x-ray free electron laser (XFEL). In PBA, an intense particle or laser beam is used to form a plasma wake that accelerates a second electron/positron beam that is properly loaded inside the wake.
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Jun 20, 2024 | 
pubs.aip.org | Max-Planck-Institut für Plasmaphysik |Brian Haines |P. Rodriguez-Fernandez
The simulation implements the same flux-tube model as Refs. 35 and 38, except that the magnetic shear is turned off. Magnetic shear is usually very important, especially in the pedestal. It also affects FLR stabilization and thus the wave number spectrum. However, the main focus of this work is to demonstrate how the enhanced confinement regimes can arise even in such systems with simplified physics and geometry.
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Jun 20, 2024 | 
pubs.aip.org | Brian Haines |P. Rodriguez-Fernandez |S. Krüger
Topics
Deuterium,
Heavy-ion collisions,
Plasmas
Understanding the interaction between magnetized ions and material surfaces is crucial in the design of magnetic fields facing target structures. The primary objective is to reduce wall material loss while simultaneously mitigating the production of impurities reintroduced into the plasma through ion sputtering.
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Jun 20, 2024 | 
pubs.aip.org | Brian Haines |P. Rodriguez-Fernandez |S. Krüger
Topics
Electrodynamics,
Rotational dynamics,
Superconducting magnets,
Ion cyclotron resonance spectroscopy,
Spectrometry,
Particle dynamics methods,
Cyclotron resonance,
Plasma dynamics,
Plasma gyrokinetics,
Plasma instabilities
Resonance phenomena involving charged particles are fundamental across diverse scientific disciplines spanning particle accelerators, spectrometry, and resonant antennas.
