X-ray Spectroscopy of Highly Charged Ne-like Ions

X-ray spectra from Ne-like Xe, Cs and Pa have been observed with the Tokyo electron beam ion trap and a flat crystal spectrometer. For several n = 3 to 2 transitions in Ne-like Ba and Cs, wavelengths have been determined with an accuracy of about 200 ppm. The experimental wavelengths are compared with previous theoretical and experimental results. X-ray transitions in Ne-like Ba have also been used to measure the spatial distribution of X-ray radiation with a spherically bent crystal. The possibility to apply such techniques to diagnostics of an EBIT is discussed.