-------------------------------------------------------------------------- Astra- A space charge tracking algorithm Version 1.0 DESY, Hamburg 2002 11.10.2003 11:46 Parameter file is: gun_02.in GTF gun Initialize element settings: -------------------------------------------------------------------------- Cavity: Reading cavity field data from : gtfrfgun.dat field smoothing is applied Cavity Frequency f = 2.856 GHz maximum gradient 120.1 MV/m at 0.000 m estimated average gradient 34.62 MV/m nominal phase -2.380 deg -------------------------------------------------------------------------- Solenoid: Reading solenoid field data from: lcls_sol.dat field smoothing is applied maximum Bz field 0.2723 T at 0.1890 m -------------------------------------------------------------------------- 200006 particles from file Mod_50.ini Cathode located at: z = 0.000 m Particles taken into account N = 200006 total charge Q = -0.3333 nC horizontal beam position x = 3.6932E-05 mm vertical beam position y = 2.8970E-05 mm longitudinal beam position z = 0.000 m horizontal beam size sig x = 0.6000 mm vertical beam size sig y = 0.6000 mm longitudinal beam size sig z = 0.000 mm total emission time t = 3.4948E-03 ns rms emission time sig t = 9.6339E-04 ns average kinetic energy E = 7.1995E-07 MeV energy spread dE = 7.2043E-04 keV transverse beam emittance eps x = 0.7121 pi mrad mm correlated divergence cor x = -0.3265 mrad transverse beam emittance eps y = 0.7123 pi mrad mm correlated divergence cor y = 0.4535 mrad longitudinal beam emittance eps z = 0.000 pi keV mm correlated energy spread cor z = 0.000 keV WARNING: Bz is not zero at the cathode, estimated emittance contribution: eps x = 2.0990E-14 pi mrad mm eps y = 2.0990E-14 pi mrad mm -------------------------------------------------------------------------- Start auto phasing: 9 unstable trajectories out of 50 Cavity phasing completed: Cavity number Energy gain [MeV] at Phase [deg] 1 5.674 214.40 -------------------------------------------------------------------------- on axis tracking of the reference particle: initial position z = 0.000 m x = 0.000 mm y = 0.000 mm initial momentum p = 0.000 MeV/c global phase shift phi = 0.000 deg time step for integration dt = 5.000 ps -------------------------------------------------------------------------- Online element settings: -------------------------------------------------------------------------- particle reaches position z = 1.400 m time of flight is t = 4.705 ns final momentum p = 6.161 MeV/c final phase (cavity 1) phi_end = 248.3 deg -------------------------------------------------------------------------- off axis tracking of the reference particle: initial position z = 0.000 m x = 0.6000 mm y = 0.6000 mm final position x = 0.5294 mm y = -1.555 mm divergence px/pz = 0.5216 mrad py/pz = -2.520 mrad -------------------------------------------------------------------------- tracking of 200006 particles : tracking will stop at z = 1.400 m space charge forces are INCLUDED mirror charges at the cathode are taken into account working ... Calculation exceeds max number of time steps Program stops Interrupt final checkpoint at z = 1.5649E-05 m total number of iteration steps: 100000 ********************************************************************** Particles taken into account N = 174697 total charge Q = -0.2912 nC horizontal beam position x = -4.3488E-05 mm vertical beam position y = 1.7261E-04 mm longitudinal beam position z = 9.9860E-11 m horizontal beam size sig x = 0.5996 mm vertical beam size sig y = 0.5995 mm longitudinal beam size sig z = 3.7423E-09 mm average kinetic energy E = -7.1592E-04 MeV energy spread dE = 19.12 keV transverse beam emittance eps x = 0.7107 pi mrad mm correlated divergence cor x = 2.1711E+13 mrad transverse beam emittance eps y = 0.7108 pi mrad mm correlated divergence cor y = 5.7622E+13 mrad longitudinal beam emittance eps z = 0.000 pi keV mm correlated energy spread cor z = 19.12 keV Particle Statistics: Total number of particles = 200006 Electrons (total) = 200006 particles at the cathode = 25309 active particles = 174697 passive particles (lost out of bunch) = 0 probe particles = 6 backward travelling particles = 0 particles lost with zrmax = 0 Tracking ended with 1 warning(s) ********************************************************************** emittance information saved to file : gun_02.Xemit.001 emittance information saved to file : gun_02.Yemit.001 emittance information saved to file : gun_02.Zemit.001 ref. part. information saved to file : gun_02.ref.001 Phase-space distributions logged in : gun_02.Log.001 ********************************************************************** finished simulation 12.10.2003 11:22 execution time: 84948.5 seconds Goodbye. -------------------------------------------------------------------------- Fortran Pause - Enter command or to continue.