Overview of the Langmuir probe system on the Mega Ampere Spherical Tokamak (MAST) Upgrade

被引：4
|
作者：
Ryan, P. J. [1 ]
Elmore, S. D. [1 ]
Harrison, J. R. [1 ]
Lovell, J. [2 ]
Stephen, R. [1 ]
机构：
[1] United Kingdom Atom Energy Author, Culham Ctr Fus Energy, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England
[2] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2023年 / 94卷 / 10期
基金：
英国工程与自然科学研究理事会;
关键词：
2-DIMENSIONAL PARTICLE SIMULATION;
D O I：
10.1063/5.0152680
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A detailed description of the Langmuir probe system on Mega Ampere Spherical Tokamak Upgrade is presented. The system features 850 tile-embedded probes and 40 bespoke electronic modules that each have the capability to drive and acquire data from up to 16 probes in a time-multiplexed manner. The system provides spatiotemporal-resolved measurements (1 cm and similar to 1 ms, respectively) in the divertor region of ion saturation current, electron temperature, and floating potential. The standard interpretation of current-voltage (IV) characteristics is to apply a four-parameter fit, based on unmagnetized probe theory, which includes a linear model for the ion saturation region. To mitigate the effect of the magnetic field, analysis is restricted to the region of the IV characteristic, which is sensitive to only the tail of the electron energy distribution function.
引用
收藏
页数：12
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