Gratings studies to compare FACET beams

Low Charge grating_period: 0.25 grating_width: 20 blaze_angle: 30 gamma: 45000 norm_emittance: 15 position: 1 fwhmx: 0.02 fwhmy: 0.02 charge: 5000000000 (312.5 pC) bunch_length_FWHM_ps: 0.067 shape: 1 asymmetry: 1 phi_step_size: 1 number_phi_step: 8
High Charge grating_period: 0.25 grating_width: 20 blaze_angle: 30 gamma: 45000 norm_emittance: 15 position: 1 fwhmx: 0.02 fwhmy: 0.02 charge: 20000000000 (1250 pC) bunch_length_FWHM_ps: 0.067 shape: 1 asymmetry: 1 phi_step_size: 1 number_phi_step: 8
Pencil beam, period=1.49 grating_period: 1.49 grating_width: 20 blaze_angle: 30 gamma: 45000 norm_emittance: 15 position: 1 fwhmx: 0.02 fwhmy: 0.02 charge: 5000000000 (312.5 pC) bunch_length_FWHM_ps: 1.67 shape: 1 asymmetry: 1 phi_step_size: 1 number_phi_step: 8