Generation and diagnostics of pulsed intense ion beams with an energy density of 10 J/cm2

Generation and diagnostics of pulsed intense ion beams with an energy density of 10 J/cm2

Dettagli Bibliografici
Parent link:Review of Scientific Instruments
Vol. 86, iss. 7.— 2015.— [073305 , 7 p.]
Ente Autore: Национальный исследовательский Томский политехнический университет (ТПУ) Физико-технический институт (ФТИ) Кафедра прикладной физики (№ 12) (ПФ)
Altri autori: Isakova Yu. I. Yulia Ivanovna, Pushkarev A. I. Aleksandr Ivanovich, Khaylov I. P. Iljya Pavlovich, Zhong H. Haowen
Riassunto:Title screen
The paper presents the results of a study on transportation and focusing of a pulsed ion beam at gigawatt power level, generated by a diode with explosive-emission cathode. The experiments were carried out with the TEMP-4M accelerator operating in double-pulse mode: the first pulse is of negative polarity (500 ns, 100-150 kV), and this is followed by a second pulse of positive polarity (120 ns, 200-250 kV). To reduce the beam divergence, we modified the construction of the diode. The width of the anode was increased compared to that of the cathode. We studied different configurations of planar and focusing strip diodes. It was found that the divergence of the ion beam formed by a planar strip diode, after construction modification, does not exceed 3° (half-angle). Modification to the construction of a focusing diode made it possible to reduce thebeam divergence from 8° to 4°-5°, as well as to increase the energy density at the focus up to 10-12 J/cm2, and decrease the shot to shot variation in the energy density from 10%-15% to 5%-6%. When measuring the ion beam energy density above the ablation threshold of the target material (3.5-4 J/cm2), we used a metal mesh with 50% transparency to lower the energy density. The influence of the metal mesh on beam transport has been studied.
Режим доступа: по договору с организацией-держателем ресурса
Lingua:inglese
Pubblicazione: 2015
Soggetti:
электронный ресурс
труды учёных ТПУ
Accesso online:http://dx.doi.org/10.1063/1.4926564
Natura: Elettronico Capitolo di libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=644772

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