Journal of Nuclear Science, Engineering and Technology (JONSAT)
In cooperation with the Iranian Nuclear Society

Operation stability, pinching efficiency and speed factor in 3-joules miniature plasma pinch generator, for different electrodes geometry

Document Type : Research Paper

Authors

M Habibi
H Jafari
https://doi.org/10.24200/nst.2019.1022
Abstract
Regarding the importance of the stability in a miniature pinch plasma generator in repetitive and strong plasma pinch, the stable operation of a 3J miniature plasma focus device in two single-shot and repetitive discharge modes (at 0.5Hz and 5Hz discharge frequencies) and the factors in creation of switch misfire was demonstrated. Then, the device efficiency and strength of the plasma pinch for four different coaxial electrode configurations were studied, upon scanning argon gas pressure ranged from 0.6 to 1.5 mbar via the study of the charging voltage variation from 8.3 to 9.3 kV. It was observed that the strength and efficient pinching is appropriately produced for the tapered anode configuration over an expanded operating pressure ranged from 0.6 to 1.5 mbar. After the calculation of the speed factor and pinch sensitivity for the optimum electrodes geometry, it was shown that the best plasma compression at the pinch phase was associated with 0.88±0.8 mbar argon gas pressure and 8.3-8.5 kV charging voltage, respectively. From the viewpoint of the stability assessment of the device, it was observed that the stable operation of the device was for the charging voltage of 8.3 to 8.7 kV in the operating pressure of 0.6 to 1.1 mbar.

Highlights

 

1. T. J. Bürvenich, J. Evers, and C. H. Keitel, Nuclear Quantum Optics with X-Ray Laser Pulses, Phys. Rev. Lett. 96, 142501 (2006).

2. B. Adams et al. X-ray quantum optics, J. Mod. Opt. 60, 2 (2013).

3. B.W. Shore, The Theory of Coherent Atomic Excitation, (Wiley, New York, 1990).

4. W.-T. Liao, A. Pálffy, and C. H. Keitel, Nuclear coherent population transfer with X-ray laser pulses, Phys. Lett. B. 705, 134 (2011).

5. W.-T. Liao, A. Pálffy, and C. H. Keitel, Three-beam setup for coherently controlling nuclear-state population,   Phys. Rev. C. 87, 054609 (2013).

6. U. Gaubatz et al. Population transfer between molecular vibrational levels by stimulated Raman scattering with partially overlapping laser fields. A new concept and experimental results, J. Chem. Phys. 92, 5363 (1990).

7. K. Bergmann, H. Theuer, and B.W. Shore, Coherent population transfer among quantum states of atoms and molecules, Rev. Mod. Phys. 70, 1003 (1998).

8. N. V. Vitanov et al. Coherent manipulation of atoms and molecules by sequential laser pulses, Adv. At. Mol. Opt. Phys. 46, 55 (2001).

 

9. N. V. Vitanov et al. Laser-induced population transfer by adiabatic passage techniques, Annu. Rev. Phys. Chem. 52, 763 (2001).

10. K. Bergmann, N. V. Vitanov, and B. W. Shore, Perspective: Stimulated Raman adiabatic passage: The status after 25 years, J. Chem. Phys. 142, 170901 (2015).

11. N. V. Vitanov et al.  Stimulated Raman adiabatic passage in physics, chemistry, and beyond, Rev. Mod. Phys. 89, 015006 (2017).

12. B. Nedaee-Shakarab, M. Saadati-Niari and F. Zolfagharpour, Nuclear-state population transfer by a train of coincident pulses, Phys. Rev. C. 94, 054601 (2016).

13. A. A. Rangelov and N. V. Vitanov, Complete population transfer in a three-state quantum system by a train of pairs of coincident pulses, Phys. Rev. A 85, 043407 (2012).

14. B. Nedaee-Shakarab, M. Saadati-Niari and F. Zolfagharpour, Nuclear-state engineering in tripod systems using x-ray laser pulses, Phys. Rev. C. 96, 044619 (2017).

15. M. Altarelli et al. XFEL: The European X-Ray Free- Electron Laser. Technical Design Report, (DESY, Hamburg, 2009).

16. N. V. Vitanov, Creation of coherent atomic superpositions by fractional stimulated Raman adiabatic passage, J. Phys. B. 32, 4535 (1999).

17. P. Spiller and G. Franchetti, The FAIR accelerator project at GSI,  Nucl. Instrum. Meth. A. 561.2, 305 (2006).

18. http://www.gsi.de/en/research/fair.htm.

Keywords

Miniature plasma generator
Pinching efficiency
Speed factor
 

1. T. J. Bürvenich, J. Evers, and C. H. Keitel, Nuclear Quantum Optics with X-Ray Laser Pulses, Phys. Rev. Lett. 96, 142501 (2006).

2. B. Adams et al. X-ray quantum optics, J. Mod. Opt. 60, 2 (2013).

3. B.W. Shore, The Theory of Coherent Atomic Excitation, (Wiley, New York, 1990).
4. W.-T. Liao, A. Pálffy, and C. H. Keitel, Nuclear coherent population transfer with X-ray laser pulses, Phys. Lett. B. 705, 134 (2011).
5. W.-T. Liao, A. Pálffy, and C. H. Keitel, Three-beam setup for coherently controlling nuclear-state population,   Phys. Rev. C. 87, 054609 (2013).
6. U. Gaubatz et al. Population transfer between molecular vibrational levels by stimulated Raman scattering with partially overlapping laser fields. A new concept and experimental results, J. Chem. Phys. 92, 5363 (1990).
7. K. Bergmann, H. Theuer, and B.W. Shore, Coherent population transfer among quantum states of atoms and molecules, Rev. Mod. Phys. 70, 1003 (1998).
8. N. V. Vitanov et al. Coherent manipulation of atoms and molecules by sequential laser pulses, Adv. At. Mol. Opt. Phys. 46, 55 (2001).
 
9. N. V. Vitanov et al. Laser-induced population transfer by adiabatic passage techniques, Annu. Rev. Phys. Chem. 52, 763 (2001).
10. K. Bergmann, N. V. Vitanov, and B. W. Shore, Perspective: Stimulated Raman adiabatic passage: The status after 25 years, J. Chem. Phys. 142, 170901 (2015).
11. N. V. Vitanov et al.  Stimulated Raman adiabatic passage in physics, chemistry, and beyond, Rev. Mod. Phys. 89, 015006 (2017).
12. B. Nedaee-Shakarab, M. Saadati-Niari and F. Zolfagharpour, Nuclear-state population transfer by a train of coincident pulses, Phys. Rev. C. 94, 054601 (2016).
13. A. A. Rangelov and N. V. Vitanov, Complete population transfer in a three-state quantum system by a train of pairs of coincident pulses, Phys. Rev. A 85, 043407 (2012).
14. B. Nedaee-Shakarab, M. Saadati-Niari and F. Zolfagharpour, Nuclear-state engineering in tripod systems using x-ray laser pulses, Phys. Rev. C. 96, 044619 (2017).
15. M. Altarelli et al. XFEL: The European X-Ray Free- Electron Laser. Technical Design Report, (DESY, Hamburg, 2009).
16. N. V. Vitanov, Creation of coherent atomic superpositions by fractional stimulated Raman adiabatic passage, J. Phys. B. 32, 4535 (1999).
17. P. Spiller and G. Franchetti, The FAIR accelerator project at GSI,  Nucl. Instrum. Meth. A. 561.2, 305 (2006).
18. http://www.gsi.de/en/research/fair.htm.

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