Study on ion current density of different species in laser produced plasma in a solenoid magnet

0585966 - ÚJF 2025 RIV GB eng C - Conference Paper (international conference)
Kanesue, T. - Ikeda, S. - Okamura, M. - Cannavó, Antonino - Ceccio, Giovanni - Grove, L. - Friedland, A.
Study on ion current density of different species in laser produced plasma in a solenoid magnet.
journal of physics: conference series. Vol. 2743. Bristol: IoP Publishing, 2024, č. článku 012099. ISSN 1742-6588.
[International Conference on Ion Sources /17./. Victoria (CA), 17.09.2023-22.09.2023]
Institutional support: RVO:61389005
Keywords : laser ion source * laser-produced plasma * magnetic field
OECD category: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
https://doi.org/10.1088/1742-6596/2743/1/012099

A solenoid magnetic field along the expanding laser-produced plasma is an essential technique of the laser ion source. The solenoid field can increase ion beam current at beam extraction point by a factor of 2 to over 100 by confining moving laser produced plasma in transverse direction. This technique is used everywhere from development lab to operational machine for user operation. However, the motion of ions in laser produced plasma is not fully understood. In this study, we experimentally investigated the motion of ions in a solenoid magnet (inner diameter 102 mm, coil length 1980 mm) for Al, Fe, and Ta targets. Using the following three conditions: full solenoid bore, a φ51 mm collimator on the solenoid axis, and a thin-wall φ51 mm tube at the bottom of the solenoid, we found that extracting ions at off-axis position (20∼30 mm from the solenoid axis in this study) can enhance ion intensity by a factor of three or more. We continue to investigate ion motion in a solenoid field to develop better laser ion source design.
Permanent Link: https://hdl.handle.net/11104/0353593