Charge exchange recombination spectroscopy for α particles colliding with hydrogen atoms

Liu, X. J.; Liu, L.; Wang, J. G.; Qu, Y. Z.; Xiao, B. J.
October 2011
Physics of Plasmas;Oct2011, Vol. 18 Issue 10, p103301
Academic Journal
The intensities of charge exchange recombination spectroscopy (CXRS) of α particles colliding with the hydrogen atoms in the neutral beam injection (NBI) are calculated by solving the rate equations including electron collision processes in the quasi-static state approximation. The effects of electron collision processes on the CXRS signals for He+(n=4→3) at λ=468.6nm in various plasma conditions are discussed, and it is found that these effects can increase the CXRS signals by 50% for electron density ne≥1015cm-3. However, their importance decreases with the increasing of NBI energy. For the short pulse of NBI, the influences of electron collision processes can be neglected for ne≤1014cm-3. Furthermore, the spectra of He+(n→n') are present for the plasma conditions of HT-7 tokamak.


Related Articles

  • Comparison of toroidal rotation velocities of different impurity ions in the DIII-D tokamak. Baylor, L. R.; Burrell, K. H.; Groebner, R. J.; Houlberg, W. A.; Ernst, D. P.; Murakami, M.; Wade, M. R. // Physics of Plasmas;Jun2004, Vol. 11 Issue 6, p3100 

    Measurements of the relative toroidal rotation velocities of low Z impurity ions have been made in DIII-D tokamak [J. L. Luxon and L. G. Davis, Fusion Technol. 8, 441 (1985)] plasmas that have a strong core pressure gradient and reduced anomalous transport. They show that the differences in...

  • Dusty Plasma Modeling of the Fusion Reactor Sheath Including Collisional-Radiative Effects. Dezairi, Aouatif; Saifaoui, Dennoun; Katsonis, Konstantinos; Samir, Mhamed; Eddahby, Mohamed; Berenguer, Chloé // AIP Conference Proceedings;9/7/2008, Vol. 1041 Issue 1, p251 

    The structure and the behavior of the sheath in Tokamak collisional plasmas has been studied. The sheath is modeled taking into account the presence of the dust2 and the effects of the charged particle collisions and radiative processes. The latter may allow for optical diagnostics of the plasma.

  • Electron-impact detachment from S-. Fritioff, K.; Sandstr�m, J.; Hanstorp, D.; Hellberg, F.; Ehlerding, A.; Larsson, M.; Collins, G. F.; Pegg, D. J.; Danared, H.; K�llberg, A. // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Nov2003, Vol. 27 Issue 1, p23 

    Absolute cross sections for single and double electron-impact detachment of the S- ion have been investigated over collision energy ranges of 0-60 eV and 0-30 eV, respectively. The experiment was performed at the ion storage ring, CRYRING. The threshold energies were measured to be 6.6 eV for...

  • Losses and nonlinear steady-state particle distribution functions for fully ionized tokamak-plasmas in the collisional transport regimes. Sonnino, G. // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Mar2011, Vol. 62 Issue 1, p81 

    Fully ionized L-mode tokamak plasmas in the fully collisional (Pfirsch-Schlüter) and in the low-collisional (banana) nonlinear transport regimes are analyzed. We derive the expressions for particles and heat losses together with the steady-state particle distribution functions in the several...

  • Loss cone boundary measurement using diagnostic neutral beam and neutral particle analyzer in a compact helical system. Matsushita, H.; Ida, K.; Okamura, S.; Isobe, M.; Akiyama, R.; Yoshimura, Y. // Review of Scientific Instruments;Oct2004 Part I & II, Vol. 75 Issue 10, p3607 

    A horizontally scannable diagnostic neutral beam (DNB) has been installed on the compact helical system (CHS) in order to study the confinement of energetic ions with different pitch angles by varying the injection angle. The DNB has been designed to provide energetic ions as a test particle...

  • Neutral beam probe spectroscopy for the measurement of local plasma density fluctuations. Komori, A.; Yamagiwa, K.; Mitarai, O.; Yamaoka, H.; Kadota, K.; Fujita, J. // Review of Scientific Instruments;Feb1986, Vol. 57 Issue 2, p151 

    A neutral Li beam probing combined with a spectroscopic technique to measure local electron-density fluctuations is experimentally demonstrated in an ECR test plasma. The density fluctuations of up to 180 kHz are excited and controlled by applying periodic bursts of sinusoidal waves to a grid....

  • Experimental comparison between plasma and gas neutralization of high-energy negative ion beams. Hanada, M.; Kashiwagi, M.; Inoue, T.; Watanabe, K.; Imai, T. // Review of Scientific Instruments;May2004, Vol. 75 Issue 5, p1813 

    A plasma neutralization efficiency of high-energy negative ion beams was measured in a practical neutralizer with substantial dimensions and compared with a gas neutralization efficiency for fusion application. Hydrogen negative ion beams of 200 keV, 4 mA were neutralized with hydrogen and argon...

  • Neutral beam diagnostics for the HT-7 tokamak. Hu, L. Q.; Wan, B. N.; Hu, C. D.; Liu, B. H.; Wu, Z. W.; Huang, J.; Rowan, William L.; Huang, H.; Gentle, K. // Review of Scientific Instruments;Oct2004 Part I & II, Vol. 75 Issue 10, p3496 

    A diagnostic neutral beam will be added to the diagnostic set so that charge-exchange recombination spectroscopy (CXRS) can be used to acquire ion temperature and rotation, and to study the role of the ion thermal transport, the radial electric field, and turbulence in the high performance HT-7...

  • Kinetic study of the secondary plasma created in the ITER neutraliser. Dure, F.; Lifschitz, A.; Bretagne, J.; Maynard, G.; Katsonis, K.; Simonin, A.; Minea, T. // AIP Conference Proceedings;3/12/2009, Vol. 1097 Issue 1, p374 

    The properties of the secondary plasma created inside the ITER Neutral Beam Injector (NBI) neutraliser, through the interaction of the high energetic hydrogen beam with the molecular hydrogen gas, have been analysed. Starting from the results of our OBI-2 PIC Monte-Carlo numerical code, detailed...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics