Second Technical Meeting on Long-Pulse Operation of Fusion Devices

Session

PWI session

15 Oct 2024, 11:30

Board Room D (IAEA Headquarters)

Conveners

PWI session

• Juan Huang (Institute of plasma physics, Chinese Academy of Sciences)

PWI session

• Juan Huang (Institute of plasma physics, Chinese Academy of Sciences)

57. Global particle balance investigation using hot wall operation in all-metal plasma facing device, QUEST

kazuaki Hanada (Advanced Fusion Research Center, Research Institute for Applied Mechanics, Kyushu University)

15/10/2024, 11:30

Plasma Wall Interactions, Exhaust and Control

35 min Oral

QUEST is a medium-sized spherical tokamak which has parameters of R~0.64m, a~0.4m, BT<0.25T. The plasma facing walls (PFWs) are made of metals such as tungsten, atmospheric sprayed tungsten (APS-W), stainless steel type 316 (SS 316L) and 316L (SS316). A RF heating source is available for long pulse operation (LPO). A hot wall has been installed to regulate PFWs temperature. Taking advantage of...

81. Hydrogen retention and outgassing analysis with examples from JET-ILW, including long-pulse discharges

Dr Dmitry Matveev (Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung – IEK-4, Jülich, Germany)

15/10/2024, 12:05

Plasma Wall Interactions, Exhaust and Control

25 min Oral

Plasma-wall interaction (PWI) plays a crucial role in plasma control in fusion devices. Apart from impurity generation and power exhaust issues, fuel recycling at plasma-facing components (PFCs) introduces additional challenges by affecting plasma density control and fueling efficiency. Hydrogen transport, retention and release from PFCs is influenced by the incoming ion and neutral particle...

45. Effect of boron coating on long pulse high confinement plasma in EAST with full metal wall

Guizhong Zuo

15/10/2024, 14:00

Plasma Wall Interactions, Exhaust and Control

25 min Oral

Boron, as a low-Z material, is widely employed for wall conditioning to enhance plasma performance in fusion devices. Boron coatings including pre-discharge coating by using carborane (C2B10H12) as the working material assisted by ion cyclotron wall conditioning (ICWC) and real time coating have been successfully performed in EAST machine with full metal first wall [1].
After pre-discharge...

83. Technological developments of the W7-X and JT-60SA metallic actively cooled divertor

Marianne Richou

15/10/2024, 14:25

Plasma Wall Interactions, Exhaust and Control

25 min Oral

For a successful operation of ITER and of future fusion reactors, several fusion devices are currently being exploited and upgraded. This paper focuses on the technical developments lead in JT-60SA (Japan) and Wendelstein 7-X (W7-X, Germany) fusion devices to provide support on the long pulse operation in metallic environment using operation conditions complementary to the current existing...

48. Evaluating laser ultrasound for the in-situ inspection of plasma-facing components.

Matthew Riding (University of Strathclyde)

15/10/2024, 14:50

RAMI (Reliability Availability Maintainability Inspectability) and Nuclear Technologies for Long-Pulse Operation

25 min Oral

In order to operate for long pulses, magnetic confinement fusion (MCF) devices are typically equipped with actively-cooled plasma-facing components (PFCs). These have been installed in several existing long-pulse MCF machines, but are expected to be more widely used in the next generation of high-powered, long-pulse devices (e.g. ITER, DEMO & commercial power plants). The circulation of...