Conveners
4.6 Fast Z Pinches II
- Farhat Beg (University of California, Sandiego)
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Sophia Rocco (Cornell University)26/06/2019, 15:304.6 Fast Z PinchesOral
The conditions and dynamics of neon gas-puff z-pinch plasmas during the implosion phase are studied on the COBRA pulsed power generator (current rise time of ~240 ns and ~0.9 MA peak current). A 526.5 nm, 10 J, 2.2 ns Thomson scattering diagnostic laser enables probing of the plasma conditions during these implosions with both spatial and temporal resolution. Collective scattering spectral...
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Dr E. Sander Lavine (Cornell University)26/06/2019, 16:004.6 Fast Z PinchesOral
COBRA, the 1 million ampere pulsed power facility at Cornell University, enables detailed investigation into magnetically driven implosions of structured cylindrical gas-puff z-pinches thanks to an extensive suite of diagnostics. Such implosions, without an applied axial magnetic field, hold promise as intense x-ray or neutron sources and, with an applied magnetic field, may be of interest for...
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Paul Campbell (University of Michigan)26/06/2019, 16:154.6 Fast Z PinchesOral
Liner implosions are susceptible to instabilities like the magneto Rayleigh-Taylor (MRT) instability. There are several ways to mitigate instabilities such as MRT. One such method uses the rotating magnetic field of a dynamic screw pinch (DSP), which can be generated using a helical return-current structure. The DSP method has been examined in simulation [1] and now in experiment as well. ...
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Sam Cordaro (University of California, San Diego)26/06/2019, 16:304.6 Fast Z PinchesOral
The dynamics of Magnetized Liner Inertial Fusion (MagLIF)1, a new and promising approach to pulsed power fusion, are presently under detailed study at Sandia National Laboratories. Alongside this, a comprehensive analysis of the influence of the specific liner design geometry in the MagLIF system on liner initiation is underway in the academic community.
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Recent work utilizing high voltage... -
Dr Guanqiong Wang (Institute of applied physics and computational mathematics)26/06/2019, 16:454.6 Fast Z PinchesOral
With the development of pulse power technology, the fast Z-pinch shows the potential of direct drive inertial confinement fusion, such as the magnetized liner inertial fusion (MagLIF) concept. The magneto Rayleigh-Taylor (MRT) instability is one of the most negative effects on the liner integrity and the implosion quality, and the level of MRT instability growth is significantly determined by...
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Dr Xiao-guang Wang (Institute of Applied Physics and Computational Mathematics, Beijing 100088, China)26/06/2019, 17:004.6 Fast Z PinchesOral
The thin aluminum liners with an aspect ratio R/Dr >> 1 have been imploded on the primary test stand (PTS) facility, where R is the outer radius of the liner and Dr is the thickness. The x-ray self-emission images present azimuthally correlated perturbations in the liner implosions. The experiments show that at −10 ns before the stagnation, the wavelengths of perturbation are about 0.93 mm and...
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Raul Melean (University of Michigan)26/06/2019, 17:159.2 Particle and Electrical (Probe) DiagnosticsOral
Magnetic fields play an important role in many HEDP regimes, however, scaling of astrophysical relevant phenomena to a laboratory setting requires the generation of strong magnetic fields (>5T) that can match the high energies achieved by the laser plasmas commonly used in these experiments. Besides the engineering challenges of fabricating a powerful electromagnet design, suitable for...
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