Spectroscopy of the Ag-wire explosion in a closely-coupled solid capillary

Routinely functioning capillary discharge-based soft X-ray lasers are pumped exclusively according to electron-collisional excitation pumping scheme on Ne-like ions. Scaling down their wavelength has been unsuccessful because it needs homogeneously pre-filled capillary with metal-vapourions like Ag (lasing wavelength of Ni-like Ag ion is 14.0 nm), Cd(13.2nm), In (12.6 nm), Sn(12.0nm) what is difficult. Vapour injection has not yet been successful and exploding wire in free space is not stable. Therefore, one of possible solutions was to explode a wire in a capillary. However, in this case, similarly as at vapour injection, a conducting layer on the capillary walls is formed that from time to time has to be removed. Therefore, a wire explosion in a liquid or in a single-use closely-coupled solid-state capillary has been suggested. Such capillary can be easily prepared by casting a geopolymer around the wire. The aperture of the capillary is the same as the wire diameter.The first experiments with Ag wire in a geopolymer have been performed. Spectra in visible, EUV ranges and electrical characteristics will be presented.