Multipactor predictions for ion cyclotron resonance heating antennas of the tokamak WEST

被引：0
|
作者：
Sleiman, Eva Al Hajj [1 ,2 ]
Hillairet, Julien [1 ]
Belhaj, Mohamed [2 ]
Dadouch, Sarah [2 ]
Maquet, Vincent [3 ]
机构：
[1] IRFM, CEA, F-13108 Saint Paul Les Durance, France
[2] Univ Toulouse, ONERA, DPHY, F-31055 Toulouse, France
[3] KMS, Lab Plasma Phys, LPP ERM, B-1000 Brussels, Belgium
来源：
NUCLEAR FUSION | 2023年 / 63卷 / 12期
关键词：
multipactor; WEST; ICRH; plasma; pressure; coupling; LONG-PULSE;
D O I：
10.1088/1741-4326/ad0509
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
During the plasma experimental campaigns performed on the tokamak WEST, a performance-limiting observation has been made on the Ion Cyclotron Resonance Heating (ICRH) system composed of three identical antennas. When only one antenna is powered while the remaining two are off, an increase in the internal pressure is measured within the non-powered antennas. The internal pressure of the non-powered antennas exceeds a safety pressure interlock whose threshold is 4.5x10(-3 )Pa, and consequently, the application of the RF power is prohibited to avoid plasma creation within these antennas. In this paper, the multipactor phenomenon caused by the inter-antennas' coupling is shown to be responsible for the pressure increase observed in the non-powered antennas. Additionally, an analytic estimation of the pressure rise caused by the multipactor is compared to that observed experimentally.
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页数：11
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