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“School of Particles And Accelerator”

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Paper   IPM / Particles And Accelerator / 15782
School of Particles and Accelerator
  Title:   Simulation and optimization of a negative hydrogen Penning ion source
  Author(s): 
1.  M Rafieian Najaf Abadi
2.  M Mahjour-Shafiei
3.  Masoomeh Yarmohammadi Satri
  Status:   Published
  Journal: Phys. Plasmas
  No.:  123501
  Vol.:  25
  Year:  2018
  Supported by:  IPM
  Abstract:
The results of a Particle-In-Cell Monte-Carlo Collision simulation of a cold cathode Penning type ion source are presented. The source is designed to generate H− ions through the volume production process. Twenty-one important processes including electron and heavy particle collisions are introduced into the simulation. The main focus was the energy distribution of electrons which has a large effect on the H− production rate in the volume production. The dependence of the energy distribution of electrons on the axial magnetic field was investigated. The large sensitivity of the H− production rate to the energy distribution of electrons was measured. It was observed that for an anode with a 5 mm radius increasing the axial magnetic field in the range of 0.5–1.1 T results in the increase in the H− density almost by a factor of 14. In addition, it was found that the anode with a radius of 5 mm was the most efficient anode in H− production among the anodes with radii from 3 to 6 mm.

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