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2006•Unpublished venueRequires access

DEVELOPMENT OF AN ION SOURCE VIA LASER ABLATION PLASMA

F. Belloni, D. Doria, A. Lorusso, V. Nassisi, L. Torrisi

Open publisher page 1 citations

Abstract

Experimental results on the development of a laser ion source (LIS) are reported. A focused UV laser beam (0.1 – 1 GW/cm^2 power density) was used to produce a plasma plume from a Cu target. Several aspects were investigated: ion angular distribution, energy distribution, ion extraction and charge loss due to ion recombination. Diagnostics on free expanding plasma and extracted ions was carried out mainly by time-of-flight measurements, performed by means of Faraday cup and electrostatic spectrometer. At 18 kV acceleration voltage, the ion beam current resulted modulated on ion mass-to-charge ratio and its maximum value was 220 μA. A Cu +1 ion bunch of 4.2 nC charge was measured.

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What this paper is about

Experimental results on the development of a laser ion source (LIS) are reported. A focused UV laser beam (0.1 – 1 GW/cm^2 power density) was used to produce a plasma plume from a Cu target. Several aspects were investigated: ion angular distribution, energy distribution, ion extraction and charge loss due to ion recombination. Diagnostics on free expanding plasma and extracted ions was carried out mainly by time-of-flight measurements, performed by means of Faraday cup and electrostatic spectrometer. At 18 kV acceleration voltage, the ion beam current resulted modulated on ion mass-to-charge ratio and its maximum value was 220 μA. A Cu +1 ion bunch of 4.2 nC charge was measured.

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Available abstract

Experimental results on the development of a laser ion source (LIS) are reported. A focused UV laser beam (0.1 – 1 GW/cm^2 power density) was used to produce a plasma plume from a Cu target. Several aspects were investigated: ion angular distribution, energy distribution, ion extraction and charge loss due to ion recombination. Diagnostics on free expanding plasma and extracted ions was carried out mainly by time-of-flight measurements, performed by means of Faraday cup and electrostatic spectrometer. At 18 kV acceleration voltage, the ion beam current resulted modulated on ion mass-to-charge ratio and its maximum value was 220 μA. A Cu +1 ion bunch of 4.2 nC charge was measured.

Key concepts: Faraday cup, Ion, Ion beam deposition, Ion gun, Atomic physics, Ion source, Plasma, Ion beam

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