Monte-Carlo simulations of runaway electron impact on tokamak plasma-facing components

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Monte-Carlo simulations of runaway electron impact on tokamak plasma-facing components

Popis výsledku v původním jazyce

During a tokamak discharge, a part of the electrons in plasma can be accelerated to relativistic velocities and energies in order of MeVs. This is due to the decreasing characteristic of the friction force on the electrons with the electron energy, because of the decreasing collisional cross-section for the suprathermal electrons. Electrons accelerated to this regime are called Runaway Electrons (RE). When the RE beam strike the surface of the first wall, they can cause heat loads in the order of hundreds of MW/m2 and damage the plasma-facing components or other tokamak parts. Unlike thermal plasma particles, RE do not deposit their entire energy directly to the surface of plasma-facing components (PFC), but in a certain depth of the material. A part of this energy is converted to heat in the solid material and a part is radiated mainly due to the bremsstrahlung. The rest of the incident energy can be lost in a form of backscattered electrons ejected from the material. The deposition depth of the RE beam energy depends on the first wall material electron stopping power.

Název v anglickém jazyce

Monte-Carlo simulations of runaway electron impact on tokamak plasma-facing components

Popis výsledku anglicky

During a tokamak discharge, a part of the electrons in plasma can be accelerated to relativistic velocities and energies in order of MeVs. This is due to the decreasing characteristic of the friction force on the electrons with the electron energy, because of the decreasing collisional cross-section for the suprathermal electrons. Electrons accelerated to this regime are called Runaway Electrons (RE). When the RE beam strike the surface of the first wall, they can cause heat loads in the order of hundreds of MW/m2 and damage the plasma-facing components or other tokamak parts. Unlike thermal plasma particles, RE do not deposit their entire energy directly to the surface of plasma-facing components (PFC), but in a certain depth of the material. A part of this energy is converted to heat in the solid material and a part is radiated mainly due to the bremsstrahlung. The rest of the incident energy can be lost in a form of backscattered electrons ejected from the material. The deposition depth of the RE beam energy depends on the first wall material electron stopping power.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

49th EPS Conference on Plasma Physics

ISBN

978-1-7138-9867-2

ISSN

0378-2271

e-ISSN

0378-2271

Počet stran výsledku

4

Strana od-do

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Název nakladatele

European Physical Society

Místo vydání

Mulhouse

Místo konání akce

Bordeaux

Datum konání akce

3. 7. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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