Preliminary measurements of the edge magnetic field pitch from 2-D Doppler backscattering in MAST and NSTX-U [PDF]
, 2016 The Synthetic Aperture Microwave Imaging (SAMI) system is a novel diagnostic consisting of an array of 8 independently-phased antennas. At any one time, SAMI operates at one of 16 frequencies in the range 10-34.5GHz.
Brunner, Jakob +4 more
core +1 more source
THz backward-wave oscillators for plasma diagnostic in nuclear fusion [PDF]
, 2016 Understanding of the anomalous transport attributed to short-scale length microturbulence through collective scattering diagnostics is key to the development of nuclear fusion energy.
Barchfeld, Robert +14 more
core +1 more source
A megawatt-level 28 GHz heating system for the National Spherical Torus Experiment Upgrade
EPJ Web of Conferences, 2015 The National Spherical Torus Experiment Upgrade (NSTX-U) will operate at axial toroidal fields of ≤ 1 T and plasma currents, Ip ≤ 2 MA. The development of non-inductive (NI) plasmas is a major long-term research goal for NSTX-U.
Taylor G. +14 more
doaj +1 more source
Nuclear Materials and Energy, 2017 An innovative PFC diagnostic, the Materials Analysis Particle Probe (MAPP) was used to study the chemistry of Plasma Facing Components (PFCs) in the National Spherical Tokamak Experiment Upgrade (NSTX-U). NSTX-U used boronization as conditioning strategy
F. Bedoya +5 more
doaj +1 more source
Excitation of toroidally localized harmonics of global Alfvén eigenmodes
Nuclear Fusion, 2023 The spherical tokamak NSTX and the upgraded, higher toroidal field, NSTX-U, routinely create plasmas with large un-thermalized populations of super-Alfvénic fast ions.
E.D. Fredrickson
doaj +1 more source
Relativistic R-matrix calculations for the electron-impact excitation of neutral molybdenum [PDF]
, 2017 A recent PISCES-B Mod experiment has revealed up to a factor of five discrepancy between measurement and the two existing theoretical models providing important diagnostics for Mo I.
Ballance, Connor +5 more
core +1 more source
Conference Report on the 7th International Symposium on Liquid metals Applications for fusion (ISLA-7) [PDF]
, 2023 Supported by the world magnetic fusion research community, a series of International Symposia on Liquid metals Applications for fusion (ISLA) have been held biannually since 2010.
126544 +11 more
core +1 more source
NSTX-U In-Vessel Control Coils' Design Concept
IEEE Transactions on Plasma Science, 2018 A successful conceptual design was completed to develop in-vessel control coils [non-axisymmetric control coils (NCCs)]. The NCCs are a series of saddle coils that are intended to satisfy a number of physics criteria including magnetic breaking, error field control, fast resistive wall mode (RWM) control, and edge-localized-mode stabilization ...
González Teodoro, Jorge Rafael +2 more
openaire +2 more sources
Design of the Synthetic Aperture Microwave Imager Upgrade for measurement of the edge current density on MAST-U [PDF]
EPJ Web of Conferences, 2019 The Synthetic Aperture Microwave Imager (SAMI) has demonstrated the feasibility of 2D Doppler backscattering for measurement of the edge magnetic pitch angle on MAST and NSTX-U.
Allen J.O., Vincent C. H., Vann R. G. L.
doaj +1 more source
The role of rectified currents in far-field RF sheaths and in SOL losses of HHFW power on NSTX
Nuclear Materials and Energy, 2017 Radio-frequency (RF) rectification is an important sheath phenomenon for wave heating of plasma in fusion devices and is proposed to be the mechanism responsible for converting high-harmonic fast-wave (HHFW) power in the National Spherical Torus ...
R.J. Perkins +8 more
doaj +1 more source