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Title: Recent progress in plasma modelling at INFN-LNS

At Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud (INFN-LNS), the development of intense ion and proton sources has been supported by a great deal of work on the modelling of microwave generated plasmas for many years. First, a stationary version of the particle-in-cell code was developed for plasma modelling starting from an iterative strategy adopted for the space charge dominated beam transport simulations. Electromagnetic properties of the plasma and full-waves simulations are now affordable for non-homogenous and non-isotropic magnetized plasma via “cold” approximation. The effects of Coulomb collisions on plasma particles dynamics was implemented with the Langevin formalism, instead of simply applying the Spitzer 90° collisions through a Monte Carlo technique. A wide database of different cross sections related to reactions occurring in a hydrogen plasma was implemented. The next step consists of merging such a variety of approaches for retrieving an “as-a-whole” picture of plasma dynamics in ion sources. The preliminary results will be summarized in the paper for a microwave discharge ion source designed for intense and high quality proton beams production, proton source for European Spallation Source project. Even if the realization of a predictive software including the complete processes involved in plasma formationmore » is still rather far, a better comprehension of the source behavior is possible and so the simulations may support the optimization phase.« less
Authors:
; ; ; ;  [1] ;  [1] ;  [2] ;  [3]
  1. INFN-Laboratori Nazionali del Sud, Via S. Sofia 62, 95125 Catania (Italy)
  2. (Italy)
  3. INFN-Laboratori Nazionali di Legnaro, Viale dell’Università 2, 35020 Legnaro, Padova (Italy)
Publication Date:
OSTI Identifier:
22482858
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 87; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; APPROXIMATIONS; BEAM TRANSPORT; COLLISIONS; DESIGN; HIGH-FREQUENCY DISCHARGES; ITERATIVE METHODS; MICROWAVE RADIATION; MONTE CARLO METHOD; OPTIMIZATION; PLASMA; PROTON BEAMS; PROTON SOURCES; SIMULATION; SPACE CHARGE; SPALLATION