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Quiescent H-mode: Difference between revisions
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A Quiescent H-mode is an [[H-mode]] without [[Edge Localized Modes|ELM]] activity. | A Quiescent H-mode is an [[H-mode]] without [[Edge Localized Modes|ELM]] activity. | ||
The QH-mode was discovered at DIII-D, | The QH-mode was discovered at DIII-D, | ||
<ref>[[doi:10.1088/0741-3335/44/5A/325|K.H. Burrell, M.E. Austin, D.P. Brennan, et al., ''Quiescent H-mode plasmas in the DIII-D tokamak'', Plasma Phys. Control. Fusion '''44''' (2002) A253]]</ref> | <ref>[[doi:10.1088/0741-3335/44/5A/325|K.H. Burrell, M.E. Austin, D.P. Brennan, et al., ''Quiescent H-mode plasmas in the DIII-D tokamak'', Plasma Phys. Control. Fusion '''44''' (2002) A253]]</ref> | ||
<ref>[[doi:10.1103/PhysRevLett.102.155003|K.H. Burrell, T.H. Osborne, P.B. Snyder, et al., ''Quiescent H-Mode Plasmas with Strong Edge Rotation in the Cocurrent Direction'', Phys. Rev. Lett. '''102''' (2009) 155003]]</ref> | <ref>[[doi:10.1103/PhysRevLett.102.155003|K.H. Burrell, T.H. Osborne, P.B. Snyder, et al., ''Quiescent H-Mode Plasmas with Strong Edge Rotation in the Cocurrent Direction'', Phys. Rev. Lett. '''102''' (2009) 155003]]</ref> | ||
but was subsequently seen at JT-60U, ASDEX-U | |||
<ref>[[doi:10.1088/0741-3335/46/5A/016|W. Suttrop, G.D. Conway, L. Fattorini, et al., ''Study of quiescent H-mode plasmas in ASDEX Upgrade'', Plasma Phys. Control. Fusion '''46''' (2004) A151]]</ref> | |||
and JET. | |||
QH plasmas have a characteristic Edge Harmonic Oscillation (EHO) but remain below the peeling stability boundary associated with ELMs. | |||
The absence of ELMs is positive for plasma operation as it reduces pulsed stresses on and damage to plasma facing components (mainly the [[divertor]]), | The absence of ELMs is positive for plasma operation as it reduces pulsed stresses on and damage to plasma facing components (mainly the [[divertor]]), | ||