EXPERIMENTAL INVESTIGATION OF X RAYS FROM PUMP TARGET

In order to explore new pumping mechanism of x -ray lasers, we have studied the x rays radiated by the pump target. The experiments were successively performed at "Xing guang" and " Shen guang" facilities. The results obtained at " Shen guang" are emphatically introduced in this paper. The targets used are made of Na/F or Cu. The x -ray spectra from Na/ F or Cu (wavelength is respectively within 1.1- l.5nm and 1.1- 1.3nm) are given. The curves of the x -ray relative intensity versus laser intensity and thickness of the target are showed. The x-ray relative intensity in front of the target is compared with that in back of the target. Meanwhile, the spatial distribution of the x rays from the line pumping source is obtained in the experiment.