561 to 570 of 570 Results
M. Gatu Johnson, C.J. Forrest, D.B. Sayre, A. Bacher, J.-L. Bourgade, C.R. Brune, J.A. Caggiano, D.T. Casey, J.A. Frenje, V.Yu. Glebov, G.M. Hale, R. Hatarik, H.W. Herrmann, R. Janezic, Y.H. Kim, J.P. Knauer, O. Landoas, D.P. McNabb, M.W. Paris, R.D. Petrasso, J.E. Pino, S. Quaglioni, B. Rosse, J. Sanchez, T.C. Sangster, H. Sio, W. Shmayda, C. Stoeckl, I. Thompson, A.B. Zylstra, 2018, "Experimental evidence of a variant neutron spectrum from the T(T,2n)alpha reaction at center-of-mass energies in the range of 16-50 keV", https://doi.org/10.7910/DVN/9I3YZU, Harvard Dataverse, V1, UNF:6:lkk8I70jSK8juzp9CSl3mg== [fileUNF]
Full calculations of six-nucleon reactions with a three-body final state have been elusive and a long-standing issue. We present neutron spectra from the T(t,2n)alpha (TT) reaction measured in inertial confinement fusion experiments at the OMEGA laser facility at ion temperatures from 4 to 18 keV, corresponding to center-of-mass energies (Ec.m.) fr... |
B. Lahmann, L. M. Milanese, W. Han, M. Gatu Johnson, F. H. Séguin, J. A. Frenje, R. D. Petrasso, K. D. Hahn, B. Jones, 2018, "Application of the coincidence counting technique to DD neutron spectrometry data at the NIF, OMEGA, and Z", https://doi.org/10.7910/DVN/5W2OZV, Harvard Dataverse, V1, UNF:6:GghVRm86H6gtT3VyDriNoQ== [fileUNF]
A compact neutron spectrometer, based on a CH foil for the production of recoil protons and CR-39 detection, is being developed for the measurements of the DD-neutron spectrum at the NIF, OMEGA, and Z facilities. As a CR-39 detector will be used in the spectrometer, the principal sources of background are neutron-induced tracks and intrinsic tracks... |
Ian H. Hutchinson, David M. Malaspina, 2018, "Prediction and Observation of Electron Instabilities and Phase Space Holes Concentrated in the Lunar Plasma Wake", https://doi.org/10.7910/DVN/T1RFIH, Harvard Dataverse, V1
Recent theory and numerical simulation predicts that the wake of the solar wind flow past the moon should be the site of electrostatic instabilities that give rise to electron holes. These play an important role in the eventual merging of the wake with the background solar wind. Analysis of measurements from the ARTEMIS satellites, orbiting the moo... |
E. M. Davis, J. C. Rost, M. Porkolab, A. Marinoni, M. A. Van Zeeland, 2018, "A combined phase contrast imaging and heterodyne interferometer system for multiscale fluctuation measurements", https://doi.org/10.7910/DVN/WPOMLK, Harvard Dataverse, V1
A novel combined diagnostic capable of measuring multiscale density fluctuations that extend from magnetohydrodynamic (MHD) to the lower range of electron temperature gradient (ETG) turbulence has been designed, installed, and operated at DIII-D. The combined diagnostic was constructed by adding a heterodyne interferometer to the pre-existing phase... |
D. Brunner, A.Q. Kuang, B. LaBombard, J.L. Terry, 2018, "The dependence of divertor power sharing on magnetic flux balance in near double-null configurations on Alcator C-Mod", https://doi.org/10.7910/DVN/O7X1HW, Harvard Dataverse, V1
Management of power exhaust will be a crucial task for tokamak fusion reactors. Reactor concepts are often proposed with double-null divertors, i.e. having two magnetic separatrices in an up-down symmetric configuration. This arrangement is potentially advantageous since the majority of the tokamak exhaust power tends to flow to the outer pair of d... |
I. Cziegler, A. E. Hubbard, J.W. Hughes, J. L. Terry, G. R. Tynan, 2018, "Turbulence Nonlinearities Shed Light on Geometric Asymmetry in Tokamak Confinement Transitions", https://doi.org/10.7910/DVN/WT1XGR, Harvard Dataverse, V1
A comprehensive study of fully frequency-resolved nonlinear kinetic energy transfer has been performed for the first time in a diverted tokamak, providing new insight into the parametric dependences of edge turbulence transitions. Measurements using gas puff imaging in the turbulent L-mode state illuminate the source of the long known but as yet un... |
A.Q. Kuang, D. Brunner, B. LaBombard, R. Leccacorvi, R. Vieira, 2018, "Design and operation of a high-heat flux, flush-mounted ‘rail’ Langmuir probe array on Alcator C-Mod.", https://doi.org/10.7910/DVN/ASKYOZ, Harvard Dataverse, V1
A poloidal array of toroidally-extended, flush-mounted ‘rail’ Langmuir probes was recently installed on Alcator C-Mod's vertical target plate divertor. The aim was to investigate if a Langmuir probe array could be designed to survive reactor-level heat fluxes and have the ability to make measurements that could be reliably interpreted under reactor... |
Joshua Stillerman, Thomas Fredian, Martin Greenwald, John Wright, 2018, "A general purpose tool-set for representing data relationships: Converting data into knowledge", https://doi.org/10.7910/DVN/SHYWLB, Harvard Dataverse, V1
Rich metadata is required to find and understand the recorded measurements from modern experiments with their immense and complex data stores. Systems to store and manage these metadata have improved over time, but in most cases are ad-hoc collections of data relationships, often represented in domain or site specific application code. We are devel... |
May 3, 2018
M. Greenwald, D. Whyte, P. Bonoli, Z. Hartwig, J. Irby, B. LaBombard, E. Marmar, J. Minervini, M. Takayasu, J. Terry, R. Vieira, A. White, S. Wukitch, D. Brunner, R. Mumgaard, B. Sorbom, 2018, "The High-Field Path to Practical Fusion Energy", https://doi.org/10.7910/DVN/OYYBNU, Harvard Dataverse, V1
This white paper outlines a vision and describes a coherent roadmap to achieve practical fusion energy in less time and at less expense than the current pathway. The key technologies that enable this path are high-field, high-temperature superconducting magnets, a molten salt liquid blanket, high-field-side lower hybrid current drive and a long-leg... |
Jun 6, 2016
Steven D. Scott; Robert T. Mumgaard, 2016, "Tokamak-independent Software Analysis Suite for Multi-Spectral Line-Polarization MSE diagnostics", https://doi.org/10.7910/DVN/WGIWLW, Harvard Dataverse, V1
A tokamak-independent analysis suite has been developed to process data from Motional Stark Effect (MSE) diagnostics. The software supports multi-spectral line-polarization MSE diagnostics which simultaneously measure emission at the MSE sigma and pi lines as well as at two `background' wavelengths that are displaced from the MSE spectrum by a few... |
