Ramp compression of a metallic liner driven by a shaped 5 MA current on the SPHINX machine

18th APS-SCCM; 24th AIRAPT

D'Almeida, T.^1 ; Lassalle, F.^1 ; Morell, A.^1 ; Grunenwald, J.^1 ; Zucchini, F.^1 ; Loyen, A.^1 ; Maysonnave, T.^2 ; Chuvatin, A.^3

CEA, DAM, GRAMAT, Gramat

F-46500, France^1

International Technologies for High Pulsed Power, Thégra

F-46500, France^2

Laboratoire de Physique des Plasmas, Ecole Polytechnique, Palaiseau

F-91128, France^3

关键词: Compression experiments;    Critical location;    Current profile;    Free surface velocity;    Linear transformer drivers;    Measured loads;    Metallic liner;    Pressure level;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/9/092002/pdf
DOI  :  10.1088/1742-6596/500/9/092002

来源: IOP

【 摘 要 】

SPHINX is a 6MA, 1-us Linear Transformer Driver operated by the CEA Gramat (France) and primarily used for imploding Z-pinch loads for radiation effects studies. A method for performing magnetic ramp compression experiments was developed using a compact Dynamic Load Current Multiplier inserted between the convolute and the load, to shape the initial current pulse. We present the overall experimental configuration chosen for these experiments and initial results obtained over a set of experiments on an aluminum cylindrical liner. Current profiles measured at various critical locations across the system, are in good agreement with simulated current profiles. The liner inner free surface velocity measurements agree with the hydrocode results obtained using the measured load current as the input. The potential of the technique in terms of applications and achievable ramp pressure levels lies in the prospects for improving the DLCM efficiency.