Języki publikacji
Abstrakty
Since the installation of PF-DENA at AEOI about one year ago, we performed quantitative studies of variation of X-ray radiations from a new Filippov-type plasma focus device: Dena (90 kJ, 25 kV, 288 ěF). The operating gas was neon at a constant low pressure of 1 torr and different pressures of krypton admixture (up to 0.3 torr), with the discharge voltage up to 18 kV. For a charging voltage of 17 kV with 41 kJ stored energy and spark gap pressure of 1.2×10-2 torr, the maximum soft and little hard X-ray (SXR-HXR) emission is found for the neon, resulting in a total SXR yield of 2 V/shot measured by silicon semiconductor diode detectors. Concerning the effect of krypton admixture, a maximum intensity of SXR radiation has been observed at low krypton pressure that is about 1 V/shot. At higher pressure, the quantity of the SXR emission decreases down to zero. However, the maximum intensity of the HXR radiation yield in the same pressure range was found to be 2.5 V/shot. By increasing the pressure of krypton up to 0.3 torr, the results show that the krypton admixture gas generally causes, a decrease of the SXR radiation yield down to zero, whereas, the HXR emission yield carries a maximum value at the optimum pressure of krypton that is about 0.1 torr. Nevertheless, the pressure increments of krypton admixture lead to decreasing in the discharge voltage for the maximum X-ray production.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
123--125
Opis fizyczny
Bibliogr. 5 poz., rys.
Twórcy
autor
- Nuclear Fusion Research Center, Atomic Energy Organization of Iran, End of North Kargar Ave., P.O. Box 14155-1339, Tehran, Iran
- Department of Physics, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran, Tel.: 9821/ 800 40 15, Fax: 9821/ 802 35 47
autor
- Nuclear Fusion Research Center, Atomic Energy Organization of Iran, End of North Kargar Ave., P.O. Box 14155-1339, Tehran, Iran
autor
- Nuclear Fusion Research Center, Atomic Energy Organization of Iran, End of North Kargar Ave., P.O. Box 14155-1339, Tehran, Iran
- Department of Physics, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran, Tel.: 9821/ 800 40 15, Fax: 9821/ 802 35 47
Bibliografia
- 1.Babazadeh AR, Habibi H, Nasiry A et al. (2001) X-ray and neutron emission studies in a new Filippov type plasma focus. In: 14th IAEA Technical Committee Meeting on Research using small fusion device, June 25–27, Sao Paulo
- 2.Filippov NV, Filippova TI, Karakin MA et al. (1996) Filippov type plasma focus as intense source of hard X-rays. IEEE Trans Plasma Sci 24;4:1215–1223
- 3.Kaczmarczyk J, Paduch M, Ryc L, Tomaszewski K (1999) Fast detection head for soft X-ray diagnostics of plasma focus. J Tech Phys 40;1:391–394
- 4.Mahe Liu, Xianping Feng, Springham SV, Sing Lee (1998) Soft Xray yield measurement in a small plasma focus operated in neon. IEEE Trans Plasma Sci 26;2:135–140
- 5.Scholz M, Sadowski M, Szydlowski A (1999) Studies of the X-ray emission from high-current discharges performed in PF-1000 facility at different operational conditions. J Tech Phys 40;1:113–116
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ6-0006-0045