Setting default value of `max_charge_groups` to 1000.

    config_.setDefault<double>("timestep_max", Units::get(0.5, "ns"));

    config_.setDefault<double>("integration_time", Units::get(25, "ns"));

    config_.setDefault<unsigned int>("charge_per_step", 10);

    config_.setDefault<unsigned int>("max_charge_groups", 10000);

    config_.setDefault<unsigned int>("max_charge_groups", 1000);

    config_.setDefault<double>("temperature", 293.15);

    // Models:

* `trapping_model`: Model for simulating charge carrier trapping from radiation-induced damage. Defaults to `none`, a list of available models can be found in the documentation. All models require explicitly setting a fluence parameter.

* `fluence`: 1MeV-neutron equivalent fluence the sensor has been exposed to.

* `charge_per_step` : Maximum number of charge carriers to propagate together. Divides the total number of deposited charge carriers at a specific point into sets of this number of charge carriers and a set with the remaining charge carriers. A value of 10 charges per step is used by default if this value is not specified.

* `max_charge_groups`: Maximum number of charge groups to propagate from a single deposit point. Temporarily increases the value of `charge_per_step` to reduce the number of propagated groups if the deposit is larger than the value `max_charge_groups`*`charge_per_step`, thus reducing the negative performance impact of unexpectedly large deposits. The default value is 10 000 charge groups. If it is set to 0, there is no upper limit on the number of charge groups propagated.

* `max_charge_groups`: Maximum number of charge groups to propagate from a single deposit point. Temporarily increases the value of `charge_per_step` to reduce the number of propagated groups if the deposit is larger than the value `max_charge_groups`*`charge_per_step`, thus reducing the negative performance impact of unexpectedly large deposits. The default value is 1000 charge groups. If it is set to 0, there is no upper limit on the number of charge groups propagated.

* `spatial_precision` : Spatial precision to aim for. The timestep of the Runge-Kutta propagation is adjusted to reach this spatial precision after calculating the uncertainty from the fifth-order error method. Defaults to 0.25nm.

* `timestep_start` : Timestep to initialize the Runge-Kutta integration with. Appropriate initialization of this parameter reduces the time to optimize the timestep to the *spatial_precision* parameter. Default value is 0.01ns.

* `timestep_min` : Minimum step in time to use for the Runge-Kutta integration regardless of the spatial precision. Defaults to 1ps.

    // Set default value for config variables

    config_.setDefault<int>("charge_per_step", 10);

    config_.setDefault<unsigned int>("max_charge_groups", 10000);

    config_.setDefault<unsigned int>("max_charge_groups", 1000);

    config_.setDefault<double>("integration_time", Units::get(25, "ns"));

    config_.setDefault<bool>("output_plots", false);

    config_.setDefault<bool>("diffuse_deposit", false);

* `temperature`: Temperature in the sensitive device, used to estimate the diffusion constant and therefore the width of the diffusion distribution.

* `recombination_model`: Charge carrier lifetime model to be used for the propagation. Defaults to `none`, a list of available models can be found in the documentation. This feature requires a doping concentration to be present for the detector.

* `charge_per_step`: Maximum number of electrons placed for which the randomized diffusion is calculated together, i.e. they are placed at the same position. Defaults to 10.

* `max_charge_groups`: Maximum number of charge groups to propagate from a single deposit point. Temporarily increases the value of `charge_per_step` to reduce the number of propagated groups if the deposit is larger than the value `max_charge_groups`*`charge_per_step`, thus reducing the negative performance impact of unexpectedly large deposits. The default value is 10 000 charge groups. If it is set to 0, there is no upper limit on the number of charge groups propagated.

* `max_charge_groups`: Maximum number of charge groups to propagate from a single deposit point. Temporarily increases the value of `charge_per_step` to reduce the number of propagated groups if the deposit is larger than the value `max_charge_groups`*`charge_per_step`, thus reducing the negative performance impact of unexpectedly large deposits. The default value is 1000 charge groups. If it is set to 0, there is no upper limit on the number of charge groups propagated.

* `propagate_holes`: If set to `true`, holes are propagated instead of electrons. Defaults to `false`. Only one carrier type can be selected since all charges are propagated towards the implants.

* `ignore_magnetic_field`: Enables the usage of this module with a magnetic field present, resulting in an unphysical propagation w/o Lorentz drift. Defaults to false.

* `integration_time` : Time within which charge carriers are propagated. If the total drift time exceeds, the respective carriers are ignored and do not contribute to the signal. Defaults to the LHC bunch crossing time of 25ns.

* `trapping_model`: Model for simulating charge carrier trapping from radiation-induced damage. Defaults to `none`, a list of available models can be found in the documentation. All models require explicitly setting a fluence parameter.

* `fluence`: 1MeV-neutron equivalent fluence the sensor has been exposed to.

* `charge_per_step`: Maximum number of charge carriers to propagate together. Divides the total number of deposited charge carriers at a specific point into sets of this number of charge carriers and a set with the remaining charge carriers. A value of 10 charges per step is used by default if this value is not specified.

* `max_charge_groups`: Maximum number of charge groups to propagate from a single deposit point. Temporarily increases the value of `charge_per_step` to reduce the number of propagated groups if the deposit is larger than the value `max_charge_groups`*`charge_per_step`, thus reducing the negative performance impact of unexpectedly large deposits. The default value is 10 000 charge groups. If it is set to 0, there is no upper limit on the number of charge groups propagated.

* `max_charge_groups`: Maximum number of charge groups to propagate from a single deposit point. Temporarily increases the value of `charge_per_step` to reduce the number of propagated groups if the deposit is larger than the value `max_charge_groups`*`charge_per_step`, thus reducing the negative performance impact of unexpectedly large deposits. The default value is 1000 charge groups. If it is set to 0, there is no upper limit on the number of charge groups propagated.

* `timestep`: Time step for the Runge-Kutta integration, representing the granularity with which the induced charge is calculated. Default value is 0.01ns.

* `integration_time`: Time within which charge carriers are propagated. After exceeding this time, no further propagation is performed for the respective carriers. Defaults to the LHC bunch crossing time of 25ns.

* `distance`: Maximum distance of pixels to be considered for current induction, calculated from the pixel the charge carrier under investigation is below. A distance of `1` for example means that the induced current for the closest pixel plus all neighbors is calculated. It should be noted that the time required for simulating a single event depends almost linearly on the number of pixels the induced charge is calculated for. Usually, a 3x3 grid (9 pixels, distance 1) should suffice since the weighting potential at a distance of more than one pixel pitch often is small enough to be neglected while the simulation time is almost tripled for `distance = 2` (5x5 grid, 25 pixels).