Sean Dettrick
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View article: Wave coupling and propagation from a fast-wave antenna in the lower hybrid range of frequencies
Wave coupling and propagation from a fast-wave antenna in the lower hybrid range of frequencies Open
A set of experiments were conducted on the LArge Plasma Device (LAPD) at UCLA to test the operational principles of a traveling wave antenna of the comb-line type. This antenna was designed to launch helicon waves (fast waves in the lower …
View article: Fast ion stabilization of tilt in large radius FRCs
Fast ion stabilization of tilt in large radius FRCs Open
The field reversed configuration (FRC) has been a curious case in plasma physics research in that early MHD analysis suggested FRCs should be grossly unstable, while experimental results contradicted that prediction. Later, this theory was…
View article: Simulations of magnetic field reversal by neutral beam injection in a mirror-confined plasma
Simulations of magnetic field reversal by neutral beam injection in a mirror-confined plasma Open
In the Norm experiment at TAE Technologies, a reversed field configuration (FRC) is formed by reversing the magnetic field of a mirror configuration using neutral beam injection. An FRC is formed and sustained in a steady state by the diam…
View article: Magnetic control of a Field Reversed Configuration
Magnetic control of a Field Reversed Configuration Open
The Field Reversed Configuration (FRC) is a highly diamagnetic plasma confinement device used in nuclear fusion research. FRC’s exhibit an internal region of weak magnetic field with ideal conditions to reach the high temperature required …
View article: Generation of field-reversed configurations via neutral beam injection
Generation of field-reversed configurations via neutral beam injection Open
We report evidence of successful generation of field-reversed configuration plasmas by neutral beam injection. This is achieved by trapping the steady-state beams in an initial seed plasma, hence providing a direct source of toroidally dir…
View article: Advancing Fusion Research and Development at TAE Technologies Through INFUSE Program
Advancing Fusion Research and Development at TAE Technologies Through INFUSE Program Open
The U.S. Department of Energy’s Innovation Network for Fusion Energy (INFUSE) program serves as a crucial catalyst by fostering public-private partnership that accelerates technological innovation for fusion energy research and development…
View article: Enhanced plasma performance in C-2W advanced beam-driven field-reversed configuration experiments
Enhanced plasma performance in C-2W advanced beam-driven field-reversed configuration experiments Open
TAE Technologies’ fifth-generation fusion device, C-2W (also called ‘Norman’), is the world’s largest compact-toroid device and has made significant progress in field-reversed configuration (FRC) plasma performance. C-2W produces record br…
View article: Refueling of field-reversed configuration core via axial plasmoids injection
Refueling of field-reversed configuration core via axial plasmoids injection Open
This study successfully developed a refueling technique for a field-reversed configuration (FRC) via axial plasmoid injection and demonstrated it on the FAT-CM device at Nihon University. The target FRC is generated using the collisional-m…
View article: A gyrokinetic simulation model for 2D equilibrium potential in the scrape-off layer of a field-reversed configuration
A gyrokinetic simulation model for 2D equilibrium potential in the scrape-off layer of a field-reversed configuration Open
The equilibrium potential structure in the scrape-off layer (SOL) of the field-reversed configuration (FRC) can be affected by the penetration of edge biasing applied at the divertor ends. The primary focus of the paper is to establish a f…
View article: RF dispersion relations in FRC geometries and HHFW regime
RF dispersion relations in FRC geometries and HHFW regime Open
Field reversed configurations (FRC) are characterized by a magnetic field topology, which exhibits the inversion of the external magnetic field through plasma sustained current and the subsequent presence of a null field surface. A monoton…
View article: Plasma flow and instabilities in the magnetic mirror with ion recycling and neutral back-flow
Plasma flow and instabilities in the magnetic mirror with ion recycling and neutral back-flow Open
Magnetic mirror configurations are observed in natural settings and have various applications in laboratory plasmas, such as a magnetic expander of the open mirror fusion devices. The axial plasma flow in open mirror systems is significant…
View article: Effects of zonal flows on ion temperature gradient instability in the scrape-off layer of a field-reversed configuration
Effects of zonal flows on ion temperature gradient instability in the scrape-off layer of a field-reversed configuration Open
Gyrokinetic simulations of long wavelength ion temperature gradient (ITG) turbulence in the scrape-off layer (SOL) of a field-reversed configuration (FRC) find that zonal flows are nonlinearly generated and are the dominant mechanism for t…
View article: Evaluation of Translation Velocity Control by Auxiliary Coils for the Collisional Merging Formation of FRCs by 2-D Resistive MHD Simulation
Evaluation of Translation Velocity Control by Auxiliary Coils for the Collisional Merging Formation of FRCs by 2-D Resistive MHD Simulation Open
Previously, the collisional merging formation of FRCs has been developed to generate high performance FRCs. A drastic increase in the excluded flux and total temperature were observed in the FRCs generated with this technique; furthermore,…
View article: Overview of TAE technologies’ HHFW project on LAPD
Overview of TAE technologies’ HHFW project on LAPD Open
Simulation survey performed at TAE Technologies, has demonstrated that high harmonic fast wave (HHFW) heating is a promising scenario to heat core electrons of FRC plasma. To prepare the proposed experimental study of HHFW antenna-plasma c…
View article: Global simulation of ion temperature gradient instabilities in a field-reversed configuration
Global simulation of ion temperature gradient instabilities in a field-reversed configuration Open
We investigate the global properties of drift waves in the beam driven field-reversed configuration (FRC), the C2-U device, in which the central FRC and its scrape-off layer (SOL) plasma are connected with the formation sections and divert…
View article: First experimental measurements of a new fast ion driven micro-burst instability in a field-reversed configuration plasma
First experimental measurements of a new fast ion driven micro-burst instability in a field-reversed configuration plasma Open
In modern field-reversed configuration (FRC) experiments at TAE Technologies, classical FRC instabilities are suppressed by advanced neutral beam injection and edge biasing methods, leading to high plasma confinement and fast ion pressure …
View article: Collisional Merging Process of Field-Reversed Configuration Plasmas in the FAT-CM Device
Collisional Merging Process of Field-Reversed Configuration Plasmas in the FAT-CM Device Open
In order to investigate the collisional merging process of field-reversed configurations (FRCs), the FAT device has recently been upgraded to FAT-CM, consisting of two field-reversed theta-pinch (FRTP) formation sections and the confinemen…
View article: Equilibrium properties of hybrid field reversed configurations
Equilibrium properties of hybrid field reversed configurations Open
Field Reversed Configurations (FRCs) heated by neutral beam injection may include a large fast ion pressure that significantly modifies the equilibrium. A new analysis is required to characterize such hybrid FRCs, as the simple relations u…
View article: Simulations of High Harmonic Fast Wave Heating on the C-2U Advanced Beam-Driven Field-Reversed Configuration Device
Simulations of High Harmonic Fast Wave Heating on the C-2U Advanced Beam-Driven Field-Reversed Configuration Device Open
Numerous efforts have been made at Tri-Alpha Energy (TAE) to theoretically explore the physics of microwave electron heating in field-reversed configuration (FRC) plasmas. For the fixed 2D profiles of plasma density and temperature for bot…
View article: Suppressed ion-scale turbulence in a hot high-β plasma
Suppressed ion-scale turbulence in a hot high-β plasma Open
An economic magnetic fusion reactor favours a high ratio of plasma kinetic pressure to magnetic pressure in a well-confined, hot plasma with low thermal losses across the confining magnetic field. Field-reversed configuration (FRC) plasmas…
View article: Gyrokinetic particle simulation of a field reversed configuration
Gyrokinetic particle simulation of a field reversed configuration Open
Gyrokinetic particle simulation of the field-reversed configuration (FRC) has been developed using the gyrokinetic toroidal code (GTC). The magnetohydrodynamic equilibrium is mapped from cylindrical coordinates to Boozer coordinates for th…