Database for Inelastic Collisions of Lithium Atoms With Electrons, Protons, and Multiply Charged Ions

Improved chopping of a lithium beam for plasma edge diagnostic at ASDEX Upgrade

“…COMPASS 2 , DIII-D 3 , JET 4 and TEXTOR 5 . The method is based on excitation from collisions of injected lithium atoms and plasma particles 6 . The beam light emission depends highly on the plasma electron density.…”

The influence of electron collisions on non-LTE Li line formation in stellar atmospheres

“…The disadvantage, however, is that convergence with basis size can be slower resulting in the appearance of pseudo-resonances. Schweinzer et al (1999) have published data from extensive 45-state CCC calculations for transitions with n ≤ 3 and n ≤ 4, and include semi-empirical cross sections for n = 4, n = 4. The calculations show good agreement with experiments where available, and analytic fits to the cross section data are provided.…”

Deconvolution-based correction of alkali beam emission spectroscopy density profile measurements

“…The atomic transition and electron loss processes due to electron (e), proton (p) and impurity (I) collisions are described by the reduced rate coefficient matrixã ij [4,15,16,17]. Taking the effect of the impurities into account through one representative impurity characterized by charge q(x) and producing an effective ion charge Z ef f (x), the matrix is written asã ij = a e ij + (1 − qf )a p ij + f a I ij , where f = (Z ef f − 1)/(q(q − 1)).…”

“…The spontaneous atomic transition probabilities are taken from the NIST atomic spectra database [18], and the cross section data found in [15,16,17] for lithium and [4] for sodium are used. The collisional j → i de-excitation rate coefficients are derived from the corresponding i → j excitation rate coefficients using the principle of detailed balance, while impurity collision rate coefficients are calculated from the proton collisional cross sections using the scaling relations given in [4,15].…”

“…The collisional j → i de-excitation rate coefficients are derived from the corresponding i → j excitation rate coefficients using the principle of detailed balance, while impurity collision rate coefficients are calculated from the proton collisional cross sections using the scaling relations given in [4,15]. The proton impact target electron loss processes are considered instead of treating the ionization and charge exchange channels separately, which is the main difference of the atomic physics kernel from the Absolut [6] inverse problem solver regarding the atomic physics.…”