Extraction of SiN− ions from source of negative ions by cesium sputtering

Wang, X.M.; Liu, J.R.; Shao, Lin; Ma, K.B.; Chen, H.; Yu, Xiangkun; Chu, W. K.

doi:10.1016/j.nimb.2005.07.146

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2015

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“…The negative ion current from SNICS is a function of target cone composition, suppressor voltage, cesium ion flux and ionizer power. The rate of cesium vapour flow influences the cesium positive ion current and cesium deposition on the target cone surface [11]. Therefore, the temperature of the cesium reservoir is usually controlled at the optimal level slightly below 180 °C.…”

Section: Methodsmentioning

confidence: 99%

Application of Li ion beam obtained by the cesium sputtering source for RBS analysis of optical layers

Gaspariūnas¹,

Kovalevskij²,

Birzul³

et al. 2015

Lith. J. Phys.

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High energy Li ions of multiple charge states (Li + , Li 2+ and Li 3+) were produced in a tandem accelerator from a source of negative ions by a cesium sputtering (SNICS) ion source. The negative ion current of Li ions up to 32 nA was obtained in the preacceleration stage after the inflection magnet and retractable aperture. The current of the high energy ion beam obtained after acceleration and used for RBS spectra measurements was up to 3 nA. The Li target cone production procedure and design are presented in this work. Initial experiments using Li RBS were performed and their results indicate enhanced analytical application capabilities of RBS for an optical coating analysis, compared to the conventional proton RBS.

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Section: Methodsmentioning

confidence: 99%