X. Chen

ORCID: 0000-0003-0557-1489
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About
Contact & Profiles
Research Areas
  • Nuclear Physics and Applications
  • Magnetic confinement fusion research
  • Cold Fusion and Nuclear Reactions
  • Particle accelerators and beam dynamics
  • Paranormal Experiences and Beliefs
  • Historical, Religious, and Philosophical Studies
  • Medical Imaging Techniques and Applications
  • Radioactive Decay and Measurement Techniques
  • Radiation Detection and Scintillator Technologies
  • Laser-Plasma Interactions and Diagnostics
  • Fusion materials and technologies
  • Plasma Diagnostics and Applications

Massachusetts Institute of Technology
1987-2022

Plasma Technology (United States)
1987-2021

Fusion Academy
1987-2021

Fusion (United States)
1989-2021

Abstract The mission of the low aspect ratio spherical tokamak NSTX-U is to advance physics basis and technical solutions required for optimizing configuration next-step steady-state fusion devices. will ultimately operate at up 2 MA plasma current 1 T toroidal field on axis 5 s, has available 15 MW neutral beam injection power different tangency radii 6 high harmonic fast wave heating. With these capabilities develop understanding control tools ramp-up sustain performance fully...

10.1088/1741-4326/ac5448 article EN Nuclear Fusion 2022-02-11

Measurements of the hot-electron (T=450 keV, n=2\ifmmode\times\else\texttimes\fi{}${10}^{11}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$) equilibrium in Constance B minimum-B magnetic mirror show that pressure profile is peaked off axis and shaped like seam on a baseball. This curve drift surface deeply trapped electrons location strongest microwave heating. The configuration stable decays quiescently collisional time scale (1--2 s) after power turned off. According to 1D pressure-weighted F...

10.1103/physrevlett.58.1853 article EN Physical Review Letters 1987-05-04

A new pseudolocal tomography algorithm is developed for soft X-ray(SXR) imaging measurements of the turbulent electron temperature fluctuations (δ Te) in tokamaks and stellarators. The overcomes constraints limited viewing ports on vessel wall (viewing angle) number lines sight (LOS). This accomplished by increasing LOS locally a region interest. Numerical modeling demonstrates that wavenumber spectrum turbulence can be reliably reconstructed, with an acceptable angles suitable low SNR...

10.1063/5.0043819 article EN cc-by Review of Scientific Instruments 2021-05-01
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