UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

Guest
2024-11-23 17:56
 HOME     CONFERENCES     SEARCH            LOGIN     NEW USER     IMAGES   


Conference: Bucharest University Faculty of Physics 2002 Meeting


Section: Optics, Spectroscopy, Plasma and Lasers


Title:
The optimisation of an intense Z-pinch discharge as a plasma source for absorption spectroscopy investigations


Authors:
Gabriela Sandolache1, Vasile Zoita1 Iancu Iova2 Claude Fleurier3, Dunpin Hong3, Jean Marc Bauchire3


Affiliation:
1- National Institute for Laser, Plasma and Radiation Physics, P.O. Box MG 36, R-76911, Bucharest-Magurele, Romania

2- University of Bucharest, Faculty of Physics, C.P. M.G.-11, RO-76900, Bucharest-Magurele, Romania

3- GREMI, Université d’Orléans, 14 rue d’Issoudun, BP 6744,

45067 ORLEANS Cedex 2, FRANCE


E-mail


Keywords:


Abstract:
The characterisation of the low voltage circuit breaker arc from the optical and plasma physics points of view represents an element of importance for the understanding of the operating mechanism and also for the current interruption process. The development of the broad band optical absorption spectroscopy method seems to be well adapted in order to perform the circuit breaker arc analysis. A pulsed power device based on a Z-pinch type discharge has been developed as a plasma source for absorption spectroscopy investigations. The spatial extension of this radiation source, its brightness, reproducibility are well adapted to characterise the circuit-breaker arc. In addition, a very short emission period compared to the lifetime of the arc discharge provides an excellent time resolution for the absorption spectroscopy method. The first compression phase of the linear pinch produced in argon has been studied from the point of view of its use as a light source. The initial pressure of argon was varied from 0.5 to 2 mbar and the condenser bank energy from 5.1 to 8.7 kJ. The characterisation of the emitted radiation, especially the influence of the condenser bank voltage and the argon pressure on the discharge has been studied. Collapse dynamics of the argon compressional pinch and the spectrally resolved continuum emission at the time of maximum compression have been observed. A very satisfactory plasma source optimisation has been achieved that fulfils the conditions required for the absorption spectroscopy method.