Investigation of the homogeneity of a high-power ion beam formed by a diode with a closed electron drift; Instruments and Experimental Techniques; Vol. 59, iss. 5

Investigation of the homogeneity of a high-power ion beam formed by a diode with a closed electron drift; Instruments and Experimental Techniques; Vol. 59, iss. 5

Detalles Bibliográficos
Parent link:Instruments and Experimental Techniques
Vol. 59, iss. 5.— 2016.— [P. 678-687]
Autor Principal: Pushkarev A. I. Aleksandr Ivanovich
Autor Corporativo: Национальный исследовательский Томский политехнический университет (ТПУ) Институт физики высоких технологий (ИФВТ) Кафедра сильноточной электроники (СЭ)
Outros autores: Xiao Yu
Summary:Title screen
The results of an investigation of the energy-density distribution over the cross section of a pulsed ion beam formed with a passive-anode diode in the mode of magnetic insulation and a closed electron drift in the anode–cathode gap are presented. Diodes of two types are studied: with external magnetic insulation (Br diode) on the BIPPAB-450 accelerator (400 kV, 80 ns) and self-magnetic insulation of electrons (spiral diode) on the TEMP-4M accelerator (250 kV, 120 ns). In the investigated diodes, various processes are used to form anode plasma: a breakdown over the surface of a dielectric coating on the anode and ionization of the anode surface with accelerated electrons (Br diode), as well as explosive emission of electrons (spiral diode). To analyze the ion-beam energy density, thermal-imaging diagnostics is used with a spatial resolution of 1–2 mm. The energy-density is calculated from the one-dimensional Child–Langmuir relationship. It is shown that a continuous plasma layer is efficiently formed on the working anode surface for all the investigated diodes. The anode-plasma concentration is rather high, and the beam-energy density is limited by the space charge of ions, but not by the plasma concentration. It is found that, when the magnetic field in the Br-diode anode–cathode gap decreases or the electron current in the spiral diode increases, the energy density of the high-power ion beam rises significantly, but the beam homogeneity decreases.
Режим доступа: по договору с организацией-держателем ресурса
Idioma:inglés
Publicado: 2016
Subjects:
электронный ресурс
труды учёных ТПУ
ионные пучки
диоды
исследования
Acceso en liña:http://dx.doi.org/10.1134/S0020441216040229
Formato: Electrónico Capítulo de libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=653300

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