H. Adler et al., FABRY-PEROT SPECTROSCOPY OF A VISIBLE MAGNETIC DIPOLE TRANSITION IN BA34+, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 98(1-4), 1995, pp. 581-584
We are using Fabry-Perot interferometry to study visible lines from hi
ghly-charged ions created and trapped within an electron beam ion trap
(EBIT). The 3d(4) D-5(2)-D-5(3) titanium-like barium (Ba34+) line at
3932(2) Angstrom was recently measured in Ref. [1] (C.A. Morgan et al.
, Phys. Rev. Lett. 74 (1995) 1716) using a grating monochromator. We p
resent preliminary Fabry-Perot spectra of this line with significantly
improved resolution. The Doppler-broadened 1 Angstrom line width is c
onsistent with an expected ion temperature of less than 1 keV. We disc
uss the possibility of resolving Zeeman splittings, and of using these
visible lines as a diagnostic in high temperature, low density plasma
s, like those that exist in tokamaks and the EBIT itself.