old_contents: #!/usr/bin/env python3
  
  import math as _math
  import numpy as _np
  import pyaccel as _pyaccel
  import mathphys as _mp
  from . import optics_mode_M0 as _optics_mode_M0
  
  _default_optics_mode = _optics_mode_M0
  _energy = 0.15e9 #[eV]
  _emittance = 170.3329758677203e-09 #[m rad]
  _energy_spread = 0.005
  _single_bunch_charge = 1e-9 #[Coulomb]
  _multi_bunch_charge  = 3e-9 #[Coulomb]
  _pulse_duration_interval = [150e-9,300e-9] #[seconds]
  _frequency = 3e9 #[Hz]
  
  def create_lattice(**kwargs):
      marker = _pyaccel.elements.marker
      linac = marker('linac')
      elist = [linac]
      the_line = _pyaccel.lattice.build(elist)
  
      return the_line
  
new_contents: #!/usr/bin/env python3
  
  import math as _math
  import numpy as _np
  import pyaccel as _pyaccel
  import mathphys as _mp
  from . import optics_mode_M0 as _optics_mode_M0
  
  _default_optics_mode = _optics_mode_M0
  _energy = 0.15e9 #[eV]
  _emittance = 170.3329758677203e-09 #[m rad]
  _energy_spread = 0.005
  _single_bunch_charge = 1e-9 #[Coulomb]
  _multi_bunch_charge  = 3e-9 #[Coulomb]
  _pulse_duration_interval = 150e-9 #[seconds]
  _frequency = 3e9 #[Hz]
  
  def create_lattice(**kwargs):
      marker = _pyaccel.elements.marker
      linac = marker('linac')
      elist = [linac]
      the_line = _pyaccel.lattice.build(elist)
  
      return the_line
  
subject: Change Linac pulse duration interval to 150 ns