EFFECT OF PRESSURE AND VOLTAGE ON SPHERICAL PLASMA FOCUS DYNAMICS

Yıl 2020, Cilt: 8 Sayı: 2, 328 - 336, 31.08.2020

Yaşar Ay

https://doi.org/10.20290/estubtdb.713271

Öz

A spherical plasma focus device with two concentric electrodes is simulated using equal amount of deuterium and tritium mixture as a working gas. The developed model is used to investigate the effect of gas pressure and charging voltage on dynamics of current sheath in spherical plasma focus. While charging voltage is varied from 15 kV to 30 kV to see the effect of voltage, gas pressure is increased from 1 Torr to 20 Torr for gas pressure study. In this work, it is found that there is a strong correlation between current sheath dynamics and investigated parameters which are gas pressure and charging voltage.

Anahtar Kelimeler

current sheath, charging voltage, discharge current, gas pressure, plasma focus

Proje Numarası

119F039

BASINÇ VE VOLTAJIN KÜRESEL PLAZMA ODAK CİHAZI DİNAMİ ÜZERİNE ETKİSİ

Öz

Eşit miktarda döteryum ve trityum gazlarının karışımı kullanılarak eş merkezli elektrotlara sahip küresel plazma odak cihazı modellenmiştir. Gaz basıncının ve voltajın küresel plazma odak cihazındaki plazma tabakası üzerindeki etkilerini incelemek için, geliştirilen model kullanılmıştır. Voltajın etkisini gözlemlemek için, voltaj 15 kV ile 30 kV arasında değiştirilirken, benzer şekilde gaz basıncının etkisini görebilmek için de gaz basıncı 1 Torr'dan 20 Torr'a doğru arttırıldı. Bu çalışmada araştırılan parametreler olan gaz basıncı ve voltaj ile plazma tabakasının dinamiği arasında güçlü bir bağlantı olduğu bulunmuştur.

Anahtar Kelimeler

plazma tabakası, voltaj, deşarj akımı, gaz basıncı, plazma odak

Destekleyen Kurum

Türkiye Bilimsel ve Teknolojik Araştırma Kurumu

Proje Numarası

119F039

Kaynakça

• [1] Zakaullah M, Murtaza G, Qamar S, Ahmad I, Beg M. Neutron and x-ray emission studies in a low energy plasma focus. Physics Scripta 1996; 53(3): 360.
• [2] Zakaullah M, Ahmad I, Murtaza G, Beg M. Influence of magnetic probe presence on current sheath Dynamics in plasma focus operation. Fusion Engineering and Design 1997; 36(4): 437-446.
• [3] Lee S, Saw SH. Neutron scaling laws from numerical experiments. Journal of Fusion Energy 2008; 27(4): 292-295.
• [4] Serban A, Lee S. Experiments on speed-enhanced neutron yield from a small plasma focus. Journal of Plasma Physics 1998; 60(1): 3-15.
• [5] Pouzo J, Milanese M. Applications of the dense plasma focus to nuclear fusion and plasma astrophysics. IEEE Transactions on Plasma Science 2003; 31(6): 1237-1242.
• [6] Zaeem AA. Effect of the drive parameter on the differential fusion products in plasma focus devices. IEEE Transactions on Plasma Science 2010; 38(8): 2069-2073.
• [7] Singh A, Sing L, Saw SH. Effect of the variation of pressure on the Dynamics and neutron yield of plasma focus machines. IEEE Transactions on Plasma Science 2017; 45(8): 2286-2291.
• [8] Etaati GR, Amrollahi R, Habibi M, Mohammadi K, Baghdadi R, Roomi A. Study of the soft and hard x-ray emitted by APF plasma focus device in different pressures. Journal of Fusion Energy 2010; 29(5): 503-507.
• [9] Ng CM, Moo SP, Wong CS. Variation of the soft x-ray emission with gas pressure in a plasma focus. IEEE Transactions on Plasma Science 1998; 26(4): 1146-1153.
• [10] Roomi A, Saion E, Habibi M, Amrollahi R, Baghdadi R, Etaati GR, Mahmood W, Iqbal M. The effect of applied voltage and operating pressure on emitted x-ray from nitrogen (n2) gas in APF plasma focus device. Journal of Fusion Energy 2011; 30(5): 413-420.
• [11] Ay Y, Al-Halim MAA, Bourham MA. Simulation of the plasma sheath Dynamics in a spherical plasma focus. The European Physical Journal D 2015; 69(9).
• [12] Ay Y, Al-Halim MAA, Bourham MA. MHD simulation for neutron yield, radiations and beam-ion properties in the spherical plasma focus. Journal of Fusion Energy 2015; 35(2): 407-414.
• [13] Ay Y. A neutron source with 1014 DT neutron yield. International Journal of Modern Physics E 2020; 28(11): 1950097.
• [14] Ay Y. A Neutron Source With 1013 Neutron Yield and Ion Properties With Respect to Gas Pressure in a Spherical Plasma Focus, IEEE Transactions on Plasma Science 2020; 48(3): 700-705.
• [15] Ay Y. Effect of the cathode radius on plasma dynamics and radiation emissions in a spherical plasma focus device. Physics of Plasmas 2019; 26 (10): 102506.