Document Type : Research Article
Authors
Department of Nuclear Engineering, Faculty of Advanced Science & Technologies, University of Isfahan, Isfahan, Iran
Abstract
In this paper, the effect of anode's insert material on spatial distribution of X-ray emission zone of plasma focus device was studied. Anode's insert materials were fabricated out of aluminum, zinc, tin, tungsten and lead. For each insert material at the constant operating voltage of 21 kV, the image of pinhole camera which monitors the surface and the top of anode was recorded at the various pressures of 0.3, 0.6, 0.9 and 1.2 mbar. The results indicated that the X-ray emission zone above the anode surface not only includes thermal radiation of plasma, but also depends on anode's insert materials. This zone could be due to the passage of high energy electrons from the vapor of anode's material above the anode's surface.
Highlights
- X-ray emitting zone changes with gas pressure and anode's insert metal.
- Spatial distribution of X-rays from anode's surface depends on the characteristics of the electron beam.
- Spatial distribution of X-rays from the plasma above the anode depends on properties of the working gas.
- Size and intensity of X-ray source increases with atomic number of the insert materials.
Keywords
Benedetti, L., Holder, J., Perkins, M., et al. (2016). Advances in X-ray framing cameras at the National Ignition Facility to improve quantitative precision in X-ray imaging. Review of Scientific Instruments, 87(2):023511.
Da Re, A., Mezzetti, F., Tartari, A., et al. (2001). Preliminary study on X-ray source from plasma focus device for fast radiography. Nukleonika, 46(suppl. 1):123–125.
Harries, W. L., Lee, J. H., and McFarland, D. R. (1978). Trajectories of high energy electrons in a plasma focus. Plasma Physics, 20(2):95.
Hussain, S., Ahmad, S., Khan, M., et al. (2003a). Plasma focus as a high intensity flash X-ray source for biological radiography. Journal of Fusion Energy, 22(3):195–200.
Hussain, S., Zakaullah, M., Ali, S., et al. (2003b). X-ray enhancement from a plasma focus by inserting lead at the anode tip. Physics Letters A, 319(1-2):181–187.
Jain, J., Moreno, J., Avaria, G., et al. (2016). Characterization of X-ray pulses from a hundred joules plasma focus to study its effects on cancer cells. In Journal of Physics: Conference
Series, volume 720, page 012043. IOP Publishing. Kalaiselvi, S., Tan, T., Talebitaher, A., et al. (2014a). Lowenergy repetitive plasma focus based neon soft X-ray lithography source. In Advances in X-Ray/EUV Optics and Components IX, volume 9207, page 92070P. International Society for Optics and Photonics.
Kalaiselvi, S. M. P., Tan, T., Talebitaher, A., et al. (2014b). Optimization of neon soft X-ray emission from 200 j plasma
focus device for application in soft X-ray lithography. In International Journal of Modern Physics: Conference Series, volume 32, page 1460323. World Scientific.
Kanani, A., Shirani, B., Jabbari, I., et al. (2014). Assessment of image quality in X-ray radiography imaging using a small plasma focus device. Radiation Physics and Chemistry, 101:59–65.
Kato, Y., Ochiai, I.,Watanabe, Y., et al. (1988). Plasma focus X-ray source for lithography. Journal of Vacuum Science & Technology B: Microelectronics Processing and Phenomena, 6(1):195–198.
Lee, S. (2014). Plasma focus radiative model: Review of the lee model code. Journal of Fusion Energy, 33(4):319–335.
Miremad, S. M. and Bidabadi, B. S. (2018). Effect of inserted metal at anode tip on formation of pulsed X-ray emitting zone of plasma focus device. Radiation Physics and Chemistry, 145:58–63.
Moreno, C. H., Clausse, A., Mart´ınez, J. F., et al. (2001). Ultrafast X-ray introspective imaging of metallic objects using a plasma focus. Nukleonika, 46.
Pavez, C., Zambra, M., Veloso, F., et al. (2014). Potentiality of a table top plasma focus as X-ray source: Radiographic applications. In Journal of Physics: Conference Series, volume 511, page 012028. IOP Publishing.
Raspa, V., Sigaut, L., Llovera, R., et al. (2004). Plasma focus as a powerful hard X-ray source for ultrafast imaging of moving metallic objects. Brazilian Journal of Physics, 34(4B):1696–1699.
Shafiq, M., Hussain, S., Waheed, A., et al. (2003). X-ray emission from a plasma focus with high-Z inserts at the anode tip. Plasma Sources Science and Technology, 12(2):199.
Tartari, A., Da Re, A., Mezzetti, F., et al. (2004). Feasibility of X-ray interstitial radiosurgery based on plasma focus device. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 213:607–610.
Venere, M., Moreno, C. H., Clausse, A., et al. (2001). Tomographic system based on plasma focus X-rays. Nukleonika, 46.
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