Articles you may be interested inSingle crystal diamond detector measurements of deuterium-deuterium and deuterium-tritium neutrons in Joint European Torus fusion plasmas Rev. Sci. Instrum. 85, 043506 (2014); 10.1063/1.4870584Probing high areal-density cryogenic deuterium-tritium implosions using downscattered neutron spectra measured by the magnetic recoil spectrometera) Phys. Plasmas 17, 056311 (2010); 10.1063/1.3304475 Line integration effects on ion temperatures in tokamak plasmas measured with neutron emission spectroscopya) Rev. Sci. Instrum. 79, 10E511 (2008); 10.1063/1.2988820 Neutron emission study of DT plasmas heated with tritium neutral beams Rev. Sci. Instrum. 72, 832 (2001); 10.1063/1.1320999Neutron spectrometry of radio-frequency heated deuterium-tritium plasmas Rev.The diagnostic information from fusion neutron energy spectra under anisotropic plasma conditions is investigated analytically and numerically. The ion anisotropy is parametrized by a Maxwellian velocity distribution with different temperatures along (T ʈ ) and across (T Ќ ) the magnetic field. The (T ʈ ,T Ќ ) dependence of selected spectral moments ͑peak shift, width, and kurtosis͒ is studied for different viewing angles.

Spectrometry of the neutron emission has been used to probe the nonthermal features of the fuel ion velocity distributions in tokamak plasmas, especially, those arising from auxiliary heating. The first time resolved measurements are reported from the use of the new magnetic proton recoil (MPR) spectrometer in observations of deuterium–tritium plasmas at JET with strong ion cyclotron resonance heating. Results from preliminary analysis data are presented and compared with simulated neutron emission spectra based on the assumptions of a thermal plasma (a single Maxwellian ion distribution) or anisotropic Maxwellians with parallel and perpendicular temperatures, beside their relative amplitudes. The diagnostic results attained are also used to assess the diagnostic capabilities and the potential for use of MPR based diagnostics on burning plasma tokamaks.

We investigate the effect of depth heterogeneity in the abdomen by multidistance timedomain diffuse optical spectroscopy on 4 volunteers finding a higher water content in shallower regions, possibly due to fat heterogeneity and/or dermis contributions.