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37 lines
1.8 KiB
ReStructuredText
.. _io_track:
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=================
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Track File Format
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=================
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The current revision of the particle track file format is 3.0.
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**/**
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:Attributes: - **filetype** (*char[]*) -- String indicating the type of file.
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- **version** (*int[2]*) -- Major and minor version of the track
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file format.
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:Datasets:
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- **track_<b>_<g>_<p>** (Compound type) -- Particle track information
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for source particle in batch *b*, generation *g*, and particle
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number *p*. particle. The compound type has fields ``r``, ``u``,
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``E``, ``time``, ``wgt``, ``cell_id``, ``cell_instance``, and
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``material_id``, which represent the position (each coordinate in
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[cm]), direction, energy in [eV], time in [s], weight, cell ID,
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cell instance, and material ID, respectively. When the particle is
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present in a cell with no material assigned, the material ID is
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given as -1. Note that this array contains information for one or
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more primary/secondary particles originating. The starting index
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for each primary/secondary particle is given by the ``offsets``
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attribute.
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:Attributes: - **n_particles** (*int*) -- Number of
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primary/secondary particles for the source history.
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- **offsets** (*int[]*) Offset (starting index) into
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the array for each primary/secondary particle. The
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last offset should match the total size of the
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array.
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- **particles** (*int[]*) -- Particle type for each
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primary/secondary particle (0=neutron, 1=photon,
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2=electron, 3=positron).
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