François, M., authorRocca, Jorge J., authorDhez, P., authorIdir, M., authorAeitoun, Ph., authorLe Pape, S., authorAmerican Physical Society, publisher2007-01-032007-01-032002Le Pape, S., et al., Electromagnetic-Field Distribution Measurements in the Soft X-Ray Range: Full Characterization of a Soft X-Ray Laser Beam, Physcial Review Letters 88, no. 18 (May 6, 2002): 183901-1-183901-4.http://hdl.handle.net/10217/67414We report direct measurement of the electromagnetic-field spatial distribution in a neonlike Ar capillary discharge-driven soft x-ray laser beam. The wave front was fully characterized in a single shot using a Shack-Hartmann diffractive optics sensor. The wave front was observed to be dependent on the discharge pressure and capillary length, as a result of beam refraction variations in the capillary plasma. The results predict ~70% of the laser beam energy can be focused into an area 4 times the size of the diffraction-limited spot, reaching intensities of ~4 × 1013 W/cm2.born digitalarticleseng©2002 American Physical Society.Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.Text