Abstract
The plasma current sheath (PCS) shape and trapping efficiency η are investigated experimentally. The experiments are carried out at the 2.2-kJ Egyptian Atomic Energy Authority Plasma Focus device, EAEA-PF1, of Mather-type geometry. Three versions of the inner electrode (IE) lengths, z0 = 9.5, 10.5, and 11.5 cm, are used. The investigations are performed with argon gas at a pressure ranging between P = 0.2 to 1.8 Torr. The PCS shape in term of its inclination angle of curvature θ and thickness λ are detected at an axial distance approaching the coaxial electrode muzzle and at three different radial distances through the annular space within the coaxial electrode assembly. Results on the trapping efficiency η are obtained from the magnetic force and PCS acceleration data under these discharge conditions. Diagnostic tools applied are a Rogowski coil and magnetic probes. Results on the PCS profile show that it has the best profile at an argon gas pressure of 0.8 Torr and IE length of 10.5 cm. The trapping efficiency η has the maximum value at gas pressures within the range of 0.6−1.8 Torr, where the maximum axial force is detected for most experimental data.
Similar content being viewed by others
REFERENCES
N. V. Filippov, T. I. Filippova, and V. P. Vinogradov, Nucl. Fusion 2, 577 (1962).
J. W. Mather, Phys. Fluids 8, 366 (1965).
V. Damideh, A. A. Zaeem, A. Heidarnia, A. Sadighzadeh, M. A. Tafreshi, F. Abbasi Davani, M. Moradshahi, M. Bakhshzad Mahmoudi, and R. Damideh, J. Fusion Energy 31, 47 (2012).
L. Soto, Plasma Phys. Controlled Fusion 47, A361 (2005).
P. Silva, J. Moreno, L. Soto, L. Birstein, R. Mayer, and W. Kies, Appl. Phys. Lett. 83, 16 (2003).
S. Lee, in Proceedings of the First International Conference on Nuclear and Renewable Energy Resources, Ankara, 2009, p. 9.
S. Lee, IEEE Trans. Plasma Sci. 19, 912 (1999).
F. M. Achamir and R. A. Behbahani, J. Plasma Fusion Res. Ser. 8, 1265 (2008).
M. Frignani, PhD thesis (Università degli Studi di Bologna, 2007).
M. Mathuthu, T. G. Zengine, and A. V. Gholap, Phys. Plasmas 3, 4572 (1996).
H. A. El-Sayed, T. M. Allam, and W. H. Gaber, J. Adv. Phys. 11, 2990 (2015).
L. Soto, C. Pavez, J. Moreno, M. Barbaglia, and A. Clausse, Plasma Sources Sci. Technol. 18, 015007 (2009).
M. A. Mohammadi, S. Sobhanian, and C. Wong, J. Phys. D 42, 045203 (2009).
T. Zhang, X. Lin, K. A. Chandra, T. L. Tan, S. V. Springham, A. Patran, P. Lee, S. Lee, and R. S. Rawat, Plasma Sources Sci. Technol. 14, 368 (2005).
T. M. Allam, H. A. El-Sayed, and H. M. Soliman, J. Energy Power Eng. 3, 436 (2011).
C. Moreno, F. Casanova, G. Correa, and A. Clausse, Plasma Phys. Controlled Fusion 45, 1989 (2003).
J. W. Mather, Methods of Experimental Physics, Ed. by L. Marton, Vol. 9B: Plasma Physics, Ed. by L. H. Lovberg and H. Griem (Academic, New York, 1971), p. 187.
H. A. El-Sayed, T. M. Allam, and H. M. Soliman, J. Adv. Phys. 10, 2802 (2015).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
El-Sayed, H.A., Allam, T.M. & Soliman, H.M. Plasma Current Sheath Shape and Trapping Efficiency in the 2.2-kJ EAEA-PF1 Plasma Focus Device. Plasma Phys. Rep. 45, 821–829 (2019). https://doi.org/10.1134/S1063780X19080038
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063780X19080038