Experimental investigation of the x-ray laser focusability using Bragg-Fresnel reflective lens

摘要

Non-linear optics, plasma generation are feasible at an intensity close to 10~(13) Wcm~(-2), which is achievable with x-ray lasers only if we succeed to focus them on about 10 μm~2 spot. Focusing power of Bragg-Fresnel reflective lenses has been tested with 21.2 nm and 13.9 nm XRLs. Hartmann technic has been used in x-ray and has shown its great usefulness. Although we did not achieve a high intensity at the focal point due to technical problem, a plasma has been produced using an x-ray laser.