Drive laser specifications Parameter Nominal spec wavelength 795

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

UV specifications at photocathode: Energetic: Spatial: Parameter Nominal spec Tolerance Comment wavelength 265 nm (3 nm bandwidth) +/- < 5 nm bandwidth may be reduced pulse energy > 0. 20 m. J < 2 % rms variation (for 1 n. C production with 3 x 10 -5 QE) fluence profile uniform (adjustable) < 20 % (ptp) spot radius 1. 2 mm < 4 % (ptp) profile centroid 0 mm < 10 % radius (rms); (< 0. 12 mm for 1. 2 mm radius) approximate

UV specifications at photocathode con’t…: Temporal: Parameter Nominal spec Tolerance 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 Comment