We present a new planar Ni compound refractive lens for high energy X-rays (116 keV). The\nlens is composed of identical plano-concave elements with longitudinal parabolic grooves manufactured\nby a punch technique. In order to increase the lens transmission, the thickness of\nthe single lens at the parabolic groove vertex was reduced to less than 5 �¼m and the radius\nof curvature was reduced to about 20 �¼m. The small radius of curvature allowed us to reduce\nthe number of single elements needed to get the focal length of 3 m to 54 single lenses. The\ngain parameter has been significantly improved compared to the previous lenses due to higher\ntransmission, but the focused beam size and its gain are not as good as expected, mostly due\nto the aberrations caused by the lens shape imperfections.
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