Ionisation Efficiency in Conical Hot Cavities

• Authors: M. Turek
• Languages of publication: EN

Abstracts

EN

Surface ionisation in a new type of hot cavity characterised by the shape of a truncated cone is considered in the paper. Influence of the hot cavity shape and its temperature on the ionisation efficiency of stable and long-lived nuclides is under investigation and the supremacy of elongated conical cavities is proven. The role of the extraction opening size is studied and its optimal diameter ( ≈ 1 mm) is found for the considered cavity shapes. It is shown that the extraction voltages of 1-2 kV are large enough to obtain high efficiencies and saturation of the current-voltage curves is observed above these values. Changes of ionisation effciency with the ioniser temperature are investigated - increase of ion yield with T is observed. It was proven that cold spots inside the ioniser cavity (near the extraction opening - in the considered case) can degrade ion source performance by several tens percent.

Keywords

EN

07.77.Ka; 07.05.Tp; 34.35.+a

Discipline

• 07.05.Tp: Computer modeling and simulation
• 07.77.Ka: Charged-particle beam sources and detectors(see also 29.40.-n Radiation detectors in nuclear physics)
• 34.35.+a: Interactions of atoms and molecules with surfaces(see also 79.77.+g Coulomb explosion)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 132
• Issue: 2
• Pages: 259-263

Dates

published

2017-08

Contributors

author

M. Turek

• Institute of Physics, Maria Curie Skłodowska University in Lublin, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

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Identifiers

DOI

10.12693/APhysPolA.132.259