In collisions between fast heavy ions and atoms,the strong Coulomb field of one of collision partners can cause inner-shell multiple-ionization of the second one[1].The high-resolution measurements of emitted X-rays in the collision are one of the most effective methods to study the multivacancy configurations in atoms or ions as well as the dynamics of the multiple ionization process.The energy shifts of X-rays from states with different vacancy configuration could be large[2].For example,the energy of the argon K hypersatellite and satellite line is between 2.9 and 3.8 keV,and the energy shift causing by per L hole is close to 20 eV[3].In order to simultaneous detection of the emitted X-rays over a wide energy range,thus avoiding the problem of changing the angle of crystal and position of the CCD in one collision system,a wide-angle and high-efficiency X-ray spectrometer based on flat HOPG(Highly Oriented Pyrolytic Graphite)crystal was developed.Due to X-ray from multi-ionized atoms.
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