A Phase Space and Its Use in Monte Carlo Simulations of Radiation Beams

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Phase space in Monte Carlo simulations of radiation beams refers to a data file containing detailed information about numerous particles, including their position, direction, and energy as they pass through a reference surface in electron accelerators. The discussion explores the relationship between this concept and classical mechanics, questioning whether the term is used consistently across different fields or if it constitutes jargon specific to medical physics. The author concludes that the phase space file can be viewed as analogous to a point in the phase space of a multi-particle system. This highlights the potential for cross-disciplinary terminology while acknowledging the nuances in its application. Overall, the conversation emphasizes the importance of clarity in scientific language.
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In the field of medical physics, specifically in monte carlo simulation of radiation beams produced by electron accelerators, people call ‘phase space’ to a file that contains the data of a large number of particles when they traverse a reference surface in the machine (usually a plane), i.e position, direction, energy, etc of each particle when traversing that plane. I am trying to see the similarity with the concept of phase space in classical mechanics but I cannot see a clear equivalence. Is it used with this meaning in other fields too, or is it just a very specific jargon? Is it an abuse of language?
 
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I answer myself. Now I see that such a file represents something similar to a point of the phase space of a system composed by many particles.
 

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