Drive laser specifications: Parameter Nominal spec Tolerance Comment Energetic: wavelength 795 nm (10 nm bandwidth) +/- < 15 nm bandwidth may be reduced pulse energy > 25 mJ (1 nC production with 3X10-5 QE) < 1 % rms variation Spatial: fluence profile uniform (adjustable) < 10 % (ptp) may be Gaussian Temporal: rep rate 120 Hz power profile < 5 % (ptp) actually require uniform uv profile profile FWHM 10 psec < 2 % rms profile rise/fall times 0.5 psec may be larger Timing jitter 0 psec < 0.5 psec (improve with best effort)

UV specifications at photocathode: Parameter Nominal spec Tolerance Comment Energetic: wavelength 265 nm (3 nm bandwidth) +/- < 5 nm bandwidth may be reduced pulse energy > 0.20 mJ (for 1 nC production with 3x10-5 QE) < 2 % rms variation Spatial: fluence profile uniform (adjustable) < 20 % (ptp) spot radius 1.2 mm < 4 % (ptp) approximate profile centroid 0 mm < 10 % radius (rms); (< 0.12 mm for 1.2 mm radius)

UV specifications at photocathode con’t…: Parameter Nominal spec Tolerance Comment Temporal: rep rate 120 Hz power profile uniform (adjustable) <30% (ptp) for mod.> 1 THz <20% (ptp) for mod.< 1 THz profile FWHM 10 psec < 2 % rms profile rise/fall times 0.5 psec (10% - 90%) timing jitter wrt RF 0 psec < 0.5 psec (improve with best effort