Admin at 17:45, 14 April 2023

2023-04-14T17:45:43Z

← Older revision		Revision as of 19:45, 14 April 2023
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	== References ==		== References ==
	<references />		<references />

			[[Category:Toroidal confinement devices]]

Rkba39f8 at 06:01, 10 April 2023

2023-04-10T06:01:44Z

← Older revision		Revision as of 08:01, 10 April 2023
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	Ongoing experiments at HSX include investigations into plasma flows<ref>[[doi:10.1088/0741-3335/58/8/084002\|A R Akerson et al, Plasma Phys. Control. Fusion '''58''' (2016) 084002]]</ref>, impurity transport, radio frequency heating, supersonic plasma fueling and the neutral population, heat pulse propagation experiments to study thermal transport, and more. These experiments are being conducted by students, staff, and faculties, often in collaboration with other universities and national laboratories in the USA and abroad.		Ongoing experiments at HSX include investigations into plasma flows<ref>[[doi:10.1088/0741-3335/58/8/084002\|A R Akerson et al, Plasma Phys. Control. Fusion '''58''' (2016) 084002]]</ref>, impurity transport, radio frequency heating, supersonic plasma fueling and the neutral population, heat pulse propagation experiments to study thermal transport, and more. These experiments are being conducted by students, staff, and faculties, often in collaboration with other universities and national laboratories in the USA and abroad.

			== See also ==

			* [https://hsx.wisc.edu/ HSX Fusion Energy Device Website]

	== References ==		== References ==
	<references />		<references />

Rkba39f8: Created page with "The Helically Symmetric Experiment (HSX) at the University of Wisconsin-Madison is a unique modular coil stellarator that is optimized for quasi-helical symmet..."

2023-04-10T05:55:10Z

Created page with "The Helically Symmetric Experiment (HSX) at the University of Wisconsin-Madison is a unique modular coil stellarator that is optimized for quasi-helical symmet..."

New page

The Helically Symmetric Experiment (HSX) at the University of Wisconsin-Madison is a unique modular coil [[stellarator|stellarator]] that is optimized for quasi-helical symmetry. The device is designed to investigate plasma transport, turbulence, and confinement in a quasi-helically symmetric magnetic field, with the aim of advancing fusion reactor technology. The HSX began operation in 1999 and has since made significant contributions to the physics of [[Quasisymmetry|quasisymmetric]] stellarators.<ref>[[doi:10.13182/FST95-A11947086|F.S.B. Anderson et al, Fusion Technol. '''27''' (1995) 273–277]]</ref>

The HSX uses a set of 48 twisted coils arranged in four field periods to generate a magnetic field for plasma containment. The vacuum vessel is made of stainless steel and is helically shaped to follow the magnetic geometry. Plasma formation and heating are achieved using 28 GHz, 100 kW electron cyclotron resonance heating (ECRH). The device also features a second 100 kW gyrotron for heat pulse modulation studies.

Experiments at HSX have shown that edge magnetic islands can affect particle fueling and exhaust. The presence of a magnetic island chain at the plasma edge can increase the plasma sourcing to exhaust ratio but reduces fueling efficiency by 25%. Moving the island radially inward decreases both the effective and global particle confinement times, which can effectively control plasma fueling and helium exhaust times. These findings suggest that the magnetic island chain in the plasma edge can be a crucial element in the design of a [[Island Divertor|divertor]] system.<ref>[[doi:10.1063/1.5026324|L. Stephey et al, Phys. Plasmas '''25''' (2018) 062501]]</ref>

HSX has also shown significant improvements over conventional stellarator designs. The device has measured large ion flows in the direction of quasisymmetry, reduced flow damping, reduced passing particle deviation from a flux surface, reduced direct loss orbits, reduced neoclassical transport, and reduced equilibrium parallel currents due to the high effective transform.<ref>[[doi:10.1088/0029-5515/53/8/082001|J.C. Schmitt et al, Nucl. Fusion '''53''' (2013) 082001]]</ref>

Ongoing experiments at HSX include investigations into plasma flows<ref>[[doi:10.1088/0741-3335/58/8/084002|A R Akerson et al, Plasma Phys. Control. Fusion '''58''' (2016) 084002]]</ref>, impurity transport, radio frequency heating, supersonic plasma fueling and the neutral population, heat pulse propagation experiments to study thermal transport, and more. These experiments are being conducted by students, staff, and faculties, often in collaboration with other universities and national laboratories in the USA and abroad.

== References ==
<references />

HSX - Revision history

Admin at 17:45, 14 April 2023

Rkba39f8 at 06:01, 10 April 2023

Rkba39f8: Created page with "The Helically Symmetric Experiment (HSX) at the University of Wisconsin-Madison is a unique modular coil stellarator that is optimized for quasi-helical symmet..."