A5103144302- Laser-Plasma Interactions and Diagnostics
- Magnetic confinement fusion research
- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Laser-Matter Interactions and Applications
- Laser-induced spectroscopy and plasma
- Particle accelerators and beam dynamics
- Fluorine in Organic Chemistry
- Astrophysics and Cosmic Phenomena
- Advanced X-ray Imaging Techniques
- High-pressure geophysics and materials
- Particle Accelerators and Free-Electron Lasers
- Atomic and Molecular Physics
- Fusion materials and technologies
- Plasma Diagnostics and Applications
- Astro and Planetary Science
- Nuclear Physics and Applications
- Geomagnetism and Paleomagnetism Studies
- Chemical Synthesis and Reactions
- Laser Design and Applications
- Ion-surface interactions and analysis
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Superconducting Materials and Applications
- Fuel Cells and Related Materials
Tri Alpha Energy (United States)
2016-2025
Shibaura Institute of Technology
2012-2025
University of California, Irvine
2015-2024
RIKEN
2014-2024
École Polytechnique
2023
University of California System
2021
UC Irvine Health
2019
UniNettuno University
2018
European Organization for Nuclear Research
2016
Centre de Développement des Technologies Avancées
2016
A data sample of 1040 days from the Kamiokande II detector, consisting subsamples 450 at electron-energy threshold Ee≥9.3 MeV and 590 Ee≥7.5 MeV, yields a clear directional correlation solar-neutrino-induced electron events with respect to Sun measurement differential distribution. These provide unequivocal evidence for production B8 by fusion in Sun. The measured flux solar neutrinos two relative prediction standard model is 0.46±0.05(stat)±0.06(syst). total tested short-term time...
A method to generate ultrahigh intense electromagnetic fields is suggested, based on the laser pulse compression, carrier frequency upshift, and focusing by a counterpropagating breaking plasma wave, relativistic flying parabolic mirror. This allows us achieve quantum electrodynamics critical field (Schwinger limit) with present-day systems.
Ion acceleration and direct ion heating in magnetic reconnection were experimentally observed during counterhelicity merging of two plasma toroids. Plasma ions are accelerated up to the order Alfv\'en speed through contraction reconnected field lines with three components. The significant (from 10 200 eV) is attributed conversion energy into thermal energy, agreement magnetohydrodynamic macroparticle simulations.
Conventional field-reversed configurations (FRCs), high-beta, prolate compact toroids embedded in poloidal magnetic fields, face notable stability and confinement concerns. These can be ameliorated by various control techniques, such as introducing a significant fast ion population. Indeed, adding neutral beam injection into the FRC over past half-decade has contributed to striking improvements stability. Further, addition of electrically biased plasma guns at ends, end plugs, advanced...
Proton-boron (p11B) fusion is an attractive potential energy source but technically challenging to implement. Developing techniques realize its requires first developing the experimental capability produce p11B in magnetically-confined, thermonuclear plasma environment. Here we report clear measurements supported by simulation of with high-energy neutral beams and boron powder injection a high-temperature (the Large Helical Device) that have resulted diagnostically significant levels alpha...
Plasma density oscillations (Langmuir waves) in the wake of an intense ( ${I}_{\mathrm{peak}}\ensuremath{\sim}3\ifmmode\times\else\texttimes\fi{}{10}^{17}\mathrm{W}/{\mathrm{cm}}^{2}$) laser pulse (100 fs) are measured with ultrafast time resolution using a longitudinal interferometric technique. Phase shifts consistent large amplitude $\ensuremath{\delta}{n}_{e}/{n}_{e}\ensuremath{\sim}1$) waves at electron plasma frequency were observed fully tunnel-ionized He plasma, corresponding to...
Nonlinear interaction of electromagnetic waves and acoustic modes in an electron-positron plasma is investigated. The electrons positrons quite plastic so that the imposition (em) causes depression other structural imprints on it through either nonresonant or resonant interaction. Our theory shows can lead to coalescence photons collapse cavity higher (\ensuremath{\ge}2) dimensions. interaction, which group velocity em equal phase waves, analyzed a set basic equations system derived via...
view Abstract Citations (144) References (72) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Two-dimensional magnetohydrodynamic model of emerging magnetic flux in the solar atmosphere Shibata, K. ; Tajima, T. Steinolfson, R. S. Matsumoto, The nonlinear undular mode buoyancy instability an isolated horizontal embedded a two-temperature layered (solar corona-chromosphere/photosphere) is investigated using two-dimensional code. results show that sheet with...
An analysis of the Mikheyev-Smirnov-Wolfenstein effect using 1040 days Kamiokande-II data is reported, which provides constraints on neutrino-oscillation parameters. The measured recoil-electron energy spectrum alone leads to conclusion that adiabatic region, 7.2\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}4}$${\mathrm{sin}}^{2}$2\ensuremath{\theta}6.3\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}3}$,...
view Abstract Citations (165) References (62) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Magnetic Viscosity by Localized Shear Flow Instability in Magnetized Accretion Disks Matsumoto, R. ; Tajima, T. Differentially rotating disks are subject to the axisymmetric instability for perfectly conducting plasma presence of poloidal magnetic fields (Balbus & Hawley 1991). For nonaxisymmetric perturbations, we find localized unstable eigenmodes whose...
IL-17A is secreted from Th17 cells, a discovery leading to revision of the mechanism underlying role Th1/Th2 in immune response. Strong evidence suggests that responses associated with inflammation are involved pathogenesis endometriosis. In present study, we first demonstrated presence cells peritoneal fluid endometriotic women by flow cytometric analysis and IL-17A-positive tissues immunohistochemistry. To investigate development endometriosis, then studied effect on IL-8 production,...
In a plasma wake wave generated by high power laser, modulations of the electron density take shape paraboloidal dense shells, moving almost at speed light. A counterpropagating laser pulse is partially reflected from acting as relativistic flying mirrors, producing time-compressed frequency-multiplied due to double Doppler effect. The reflection accompanied its frequency multiplication (with factor 50 114) was detected in our experiment.
Searches for possible day-night and semiannual variations of the $^{8}\mathrm{B}$ solar neutrino flux are reported based on 1040 days Kamiokande-II data. Within statistical error, no such short-time were observed. The limit difference sets a constraint neutrino-oscillation parameters. A region defined by ${\mathrm{sin}}^{2}$2\ensuremath{\theta}>0.02...
Laser light reflection by a relativistically moving electron density modulation (flying mirror) in wake wave generated plasma high intensity laser pulse is investigated experimentally. A counterpropagating reflected and upshifted frequency with multiplication factor of 37--66, corresponding to the extreme ultraviolet wavelength. The demonstrated flying mirror reflectivity (from $3\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$...
Optical parametric chirped-pulse amplification (OPCPA) operation with low gain by seeding high-energy, clean pulses is shown to significantly improve the contrast better than 10(-10) 10(-11) in a high-intensity Ti:sapphire laser system that based on amplification. In addition high-contrast broadband, high-energy output from final amplifier achieved flat-topped spatial profile of filling factor near 77%. This result pump beam homogenization diffractive optical elements. Final pulse energies...
We observed the increase of conversion efficiency from laser energy to Kalpha x-ray (eta(K)) produced by a 60 fs frequency doubled high-contrast pulse focused on Cu foil, compared case fundamental pulse. eta(K) shows strong dependence nonlinearly modified rising edge It reaches maximum for 100 negatively The hot electron efficient heating leads enhancement eta(K). This demonstrates that lasers are an effective tool optimizing eta(K), via increasing electrons vacuum heating.
TAE Technologies' research is devoted to producing high temperature, stable, long-lived field-reversed configuration (FRC) plasmas by neutral-beam injection (NBI) and edge biasing/control. The newly constructed C-2W experimental device (also called 'Norman') the world's largest compact-toroid (CT) device, which has several key upgrades from preceding C-2U such as higher input power longer pulse duration of NBI system well installation inner divertors with upgraded electrode biasing systems....
TAE Technologies, Inc. (TAE) is pursuing an alternative approach to magnetically confined fusion, which relies on field-reversed configuration (FRC) plasmas composed of mostly energetic and well-confined particles by means a state-of-the-art tunable energy neutral-beam (NB) injector system. TAE's current experimental device, C-2W (also called 'Norman'), the world's largest compact-toroid device has made significant progress in FRC performance, producing record breaking, high temperature...
Organic dyes showing absorbance and fluorescence in the near infrared short‐wave regions are attractive for a variety of applications. Redox‐coupled reversible switching or implies enhanced functionality such dyes, especially where large changes photophysical properties across redox process can be realized. Here, we report synthesis two new pyrazinacenes containing four five fused pyrazine units, appended with electron‐donor triphenylamine groups, redox‐coupled their properties. In reduced...