Spatial coherence measurement of a high average power table-top soft X-ray laser Yanwei Liu, M. Seminario, F.G. Tomasel, C. Chang, J.J. Rocca et D.T. Attwood J. Phys. IV France, 11 PR2 (2001) Pr2-123-Pr2-126 DOI: 10.1051/jp4:2001224