Экспериментальное исследование образования страт при электрическом взрыве фольги в вакууме
| Parent link: | Известия вузов. Физика: научный журнал/ Национальный исследовательский Томский государственный университет (ТГУ).— , 1957- Т. 58, № 9-2.— 2015.— [С. 113-117] |
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| Summary: | Заглавие с экрана Рассматривается формирование страт, образующихся в процессе электрического взрыва металлических фольг при плотности тока ~ 10 8 А/см 2. Процесс стратификации регистрировался при помощи мягкого рентгеновского излучения, сформированного в «горячей точке» Х-пинча. Эксперименты проводились с Al- и Cu-фольгами длиной 20 мм, шириной 1 мм и толщиной 6 мкм. Анализ экспериментальных результатов показывает, что наиболее вероятной причиной стратификации является тепловая неустойчивость, которая развивается из-за увеличения сопротивления металлической фольги с ростом температуры. The formation of the strata during fast explosion of metal foils at current densities of ~ 10 8 A/cm 2 has been studied experimentally. To observe the strata the soft X-ray radiation generated by an X-pinch were used. The experiment on studying the process of stratification during the foil explosion (FE) was carried out in a setup consisting of three generators. The first generator WEG-2 [1] was operated to initiate FEs, while two other generators-radiographs XPG-1 and XPG-2, were used for diagnostics. The generator WEG-2 represents RLC-contour, with capacity 250 nF, which was charged to voltage of 20 kV, and the current rate of 16 A/ns. The test foil was fastened in a special holder with its contacts to the electrodes soldered. The radiographs XPG-1 and XPG-2 [2] have the capacitance of 1mcF, the charge voltage of 43 kV, the current of 300 kA, and the current rise time of 180 ns. Four crossed molybdenum wires with diameter of 25 µm were used as a load. The delay between the operation of the WEG-2 and XPG generators was set with the use of DPG trigger pulse generator; the operation jitter was 20 ns for the all generators. The delay between the operations was regulated in the range of 0.1 up to 1.3µs. Fine foils of aluminum and cooper were used as conductors. The length of foil was 2 cm, the foil width was 1mm, and the foil thickness was 6 µm. In our experiments the shunting discharge develops at the metal explosion in the vacuum. Analysis of the experimental results suggests that the most probable reason for the stratification is the thermal instability. Режим доступа: по договору с организацией-держателем ресурса |
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2015
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| Online Access: | http://elibrary.ru/item.asp?id=24993867 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=645846 |