Ion energy spread and current measurements of the rf-driven multicusp ion source

Autor: D. Wutte, L. Sun, Jasmina Vujic, M. D. Williams, D. S. Pickard, Y. Lee, L. T. Perkins, Ka-Ngo Leung, W.B. Kunkel, R. A. Gough

Publikováno v: Review of Scientific Instruments. 68:1398-1402

Axial energy spread and useful beam current of positive ion beams have been carried out using a radio frequency (rf)-driven multicusp ion source. Operating the source with a 13.56 MHz induction discharge, the axial energy spread is found to be approx

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::32768e8dccd98ea0afab755088810ee6
https://doi.org/10.1063/1.1147948

A compact filament-driven multicusp ion source

Autor: D. Wutte, M. D. Williams, Ka-Ngo Leung, R.A. Gough, D. S. Pickard, Jasmina Vujic, L. Sun, W.B. Kunkel, Y. Lee, L. T. Perkins

Publikováno v: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 119:543-548

A compact filament-driven multicusp ion source has been studied using both hydrogen and helium. Three aspects of the source have been investigated: hydrogen ion species, axial energy spread and extractable current. An atomic ion fraction (H+) of appr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::39a0334811f9e3b9abf2d11ce34e518a
https://doi.org/10.1016/s0168-583x(96)00623-4

Multicusp sources for ion beam projection lithography

Autor: D. Wutte, Jasmina Vujic, Y. Lee, N. Zahir, Ka-Ngo Leung, M. D. Williams, W.B. Kunkel, R. A. Gough

Publikováno v: Review of Scientific Instruments. 69:877-879

Multicusp ion sources are capable of producing positive and negative ions with good beam quality and low energy spread. The ion energy spread of multicusp sources has been measured by three different techniques. The axial ion energy spread has been r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2c9850bf10338da199f04f15b7a237f9
https://doi.org/10.1063/1.1148469

The CCVV high-current megavolt-range DC accelerator

Autor: O. A. Anderson, W.B. Kunkel, C.A. Matuk, J.W. Kwan, L.L. Reginato, P. Purgalis, G. J. de Vries, L. Soroka, Russell Wells, M. C. Vella, W. S. Cooper

Publikováno v: Proceedings of the 1989 IEEE Particle Accelerator Conference, . 'Accelerator Science and Technology.

The authors describe a constant-current variable-voltage (CCVV) accelerator, intended to operate in the megaelectronvolt energy range but tunable down to a few percent of magnetoelectronvolt without loss of beam current. They present experimental res

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b1d0f63149a9faed3eaf7b06db7d6786
https://doi.org/10.1109/pac.1989.73369

Quantum yield measurements of photocathodes illuminated by pulsed ultraviolet laser radiation

Autor: J.M. Watson, W.B. Kunkel, C.Y. Li, P. Chen, A.T. Young, K.N. Leung

Publikováno v: Young, A.T.; Chen, P.; Kunkel, W.B.; Leung, K.N.; Li, C.Y.; & Watson, J.M.(1991). Quantum Yield Measurements of Photocathodes Illuminated by Pulsed Ultraviolet Laser Radiation. Lawrence Berkeley National Laboratory: Lawrence Berkeley National Laboratory. Retrieved from: http://www.escholarship.org/uc/item/3n00t3bs

The electron quantum yields from polycrystalline lanthanum hexaboride and barium irradiated by near ultraviolet laser excitation have been determined. These measurements show that the quantum yields from these materials are dependent on the processin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7806200edc18e748f97411bb510bf1dc
https://doi.org/10.1109/pac.1991.164847