Experimental Evidence for Magnetic Field Effects on Dielectronic Recombination via High Rydberg States

Dielectronic recombination data for dynamic finite-density plasmas

“…dominate the dielectronic recombination process can be Starkmixed by weak electric fields (Burgess & Summers 1969), in particular the plasma microfield (Jacobs et al 1976), and so increase the partial rate coefficients by factors of 2, or 3, or more, over a wide range of n. Recently, the picture has been further complicated by the discovery that magnetic fields, when crossed with an electric field, strongly affect the electric field enhancement -by reducing it in most cases(see Robicheaux et al 1997;Bartsch et al 1999;Schippers et al 2000;Böhm et al 2001). While this suppression of the electric field enhancement is advantageous towards the use of field-free dielectronic recombination data, it is disadvantageous in terms of trying to compute field-dependent data for plasma modelling.…”

Dielectronic recombination data for dynamic finite-density plasmas

“…The effect of the plasma microfield on dielectronic recombination was studied by Jacobs et al (1976). Recent experimental (Bartsch et al 1997) and theoretical (Robicheaux & Pindzola 1997;Griffin et al 1997;Mitnik et al 1999) studies have shown the importance of the effects of crossed external electric and magnetic fields. However, as explained by Badnell et al (1993Badnell et al ( , 2003, field-free data is the most suitable starting point for plasma modelling.…”

Dielectronic recombination data for dynamic finite-density plasmas

“…The effects of external electric fields on dielectronic recombination are found to be quite significant by Griffin et al (1986) in their studies of Na-like ions P 4+ , S 5+ , Cl 6+ and by Griffin & Pindzola (1987) in their studies of Fe 15+ . Recent experimental (Bartsch et al 1997(Bartsch et al , 1999Böhm et al 2001Böhm et al , 2002Schippers et al 2000;Gwinner et al 2000), and theoretical studies (Robicheaux & Pindzola 1997;Robicheaux et al 1998;Griffin et al 1998;Mitnik et al 1999) have shown the importance of the effects of crossed external electric and magnetic fields. We expect that low charge Na-like ions will be more sensitive to the external fields, as is the case for Li-like ions (Badnell et al 1993).…”