Demonstration of a hybrid collisional soft-x-ray laser

K. A. Janulewicz, J. J. Rocca, F. Bortolotto, M. P. Kalachnikov, V. N. Shlyaptsev, W. Sandner, and P. V. Nickles Max Born Institute, Max-Born-Strasse 2A, D-12489 Berlin, Germany Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, Colorado 80523 Department of Applied Science, UC Davis-Livermore, California 94550 ~Received 1 September 2000; published 6 February 2001!