Data for: "Group velocity control in the LWFA using a pre-pulse"
================================================================

This dataset contains the data presented in the attached paper.
Data were produced using the open-source FBPIC code (https://github.com/fbpic/fbpic) version 0.19.1.

The dataset is organised as follows:

time_evolution/
    DBL_main-pulse_a0.txt
    DBL_main-pulse_centroid_ne.txt
    DBL_main-pulse_centroid_z.txt
    DBL_main-pulse_lambda.txt
    DBL_main-pulse_t.txt
    DBL_main-pulse_waist.txt
    DBL_main-pulse_z-back-of-bubble.txt
    DBL_main-pulse_z-dephasing-point.txt
    SGL_main-pulse_a0.txt
    SGL_main-pulse_centroid_ne.txt
    SGL_main-pulse_centroid_z.txt
    SGL_main-pulse_lambda.txt
    SGL_main-pulse_t.txt
    SGL_main-pulse_waist.txt
    SGL_main-pulse_z-back-of-bubble.txt
    SGL_main-pulse_z-dephasing-point.txt
    time.txt

snapshot/
    DBL_main-pulse_position.txt
    DBL_main-pulse_rms-intensity.txt
    PP_pre-pulse_density-profile.txt
    PP_pre-pulse_position.txt
    PP_pre-pulse_rms-intensity.txt


Figures 1 and 3 use the time evolution data, where:
---------------
  * "SGL_main-pulse" indicates data for the main pulse from the single pulse simulation (SGL)
  * "DBL_main-pulse" indicates data for the main pulse from the double pulse simulation (DBL)

  * time.txt                     contains the data timesteps

The following should be plotted against time.txt:
  * ..._a0.txt                   contains the value of a0
  * ..._lambda.txt               contains the wavelength
  * ..._waist.txt                contains the waist
  * ..._centroid_z.txt           contains the position of the laser centroid
  * ..._centroid_ne.txt          contains the density at the position of the laser centroid

The following should be plotted against a restricted subset of the time given in ..._t.txt:
  * ..._z-back-of-bubble.txt     contains the position of the back of the bubble (determined from Ez)
  * ..._z-dephasing-point.txt    contains the position of the back of the bubble (determined from Ez)


Figure 2 uses the snapshot data, which is a snapshot of the density and (RMS) intensity fields after 3mm propagation.
--------
  * "PP_pre-pulse" indicates data for the pre-pulse from the pre-ulse only simulation
  * "DBL_main-pulse" indicates data for the main pulse from the double pulse simulation

  * ..._position.txt             contains position within the simulation domain
  * ..._rms-intensity.txt        contains the RMS intensity
  * ..._density_profile.txt      contains the density profile (interval [0,1])

Further support is available by contacting Prof. Dino Jaroszynski: dino@phys.strath.ac.uk