Functional methods applied to plasma theory problems 
Basic pathintegral method for the statistical analysis of stochastic processes 
The classical statistical analysis of simple random processes, can be formulated in terms of the Martin Siggia Rose functional and reformulated (Jensen) in terms of pathintegral. The Faynman diagrammatic expansion allows to calculate the generating functional and derive the irreducible correlations by functional derivatives. It is a classic approach, it has been used in a large number of problems and is efficient. 

Simple Langevin equations 
Examples of processes that can be directly analysed using pathintegral methods. It also include an application to the Levy process. 

Magnetic stochasticity 
Particle trajectories in stochastic magnetic fields 

Collisional particles in stochastic magnetic field 
Collisional diffusion in stochastic magnetic field. The reference case is a Tokamak. 
Diffusion with trapping 
There is a wide variety of methods that have been developed for this problem. We restrict here to our pathintegral applications. 

Diffusion with trapping in 2D fluid or plasmas 
The 2D process that is examined here is more general, but it was isnpired by the trapping of impurities in turbulent eddies in Tokamak 

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