An investigation of the emittance of escaping fast electron beams from planar and nanowire targets - E. Hume; P. Köster; F. Baffigi; F. Brandi; D. Calestani; G. Cristoforetti; L. Fulgentini; L. Labate; A. Marasciulli; S. Morris; D. Palla; M. Salvadori; et al. (High Power Laser Science and Engineering)