Measurement of effective ion charge using visible bremsstrahlung on HL-2A tokamak

NUCLEAR FUSION AND PLASMA PHYSICS ›› 2014, Vol. 34 ›› Issue (3): 193-199.

• Plasma Physics • Next Articles

Measurement of effective ion charge using visible bremsstrahlung on HL-2A tokamak

WEI Yan-ling, YU De-liang, LIU Liang

(Southwestern Institute of Physics, Chengdu 610041)

Received:2013-09-22 Revised:2014-07-11 Online:2014-09-15 Published:2014-09-15

HL-2A 装置中利用可见光谱段轫致辐射测量有效离子电荷数

魏彦玲，余德良，刘亮

(核工业西南物理研究院，成都 610041)

作者简介:魏彦玲(1986-)，女，甘肃榆中人，硕士研究生，研究方向为等离子体实验与诊断。

Abstract

Abstract:

The multichannel bremsstrahlung measurement system on HL-2A tokamak has been using to observe the intensity of visible (535.1nm) bremsstrahlung radiation. Combined the intensity with plasma electron density and electron temperature, the effective ion charge measurements can be obtained on HL-2A tokamak. The 1×10¹⁹m⁻³to 4×10¹⁹m⁻³ experimental results show that when the plasma electron density increases from 1×10 m to 4×10 m , the effective ion charge number changes from 5 down to around 2. The bremsstrahlung radiation signal intensity is proportional to the quadratic plasma density. When the electron density is higher than 3×10¹⁹m⁻³, the multichannel bremsstrahlung measurement system can collect sufficient signal through the plasma, which enables the measurement of effective ion charge radial profile.

Key words: Bremsstrahlung, Abel inversion, Effective ion charge

摘要：

通过测量可见光谱段的轫致辐射(λ=535.1nm)强度，结合等离子体电子密度和电子温度,HL-2A

装置上的多道轫致辐射测量系统实现了平均有效离子电荷数以及有效离子电荷数径向分布的测

量。实验结果显示,当等离子体电子密度从1×10¹⁹m⁻³升高到4×10¹⁹m⁻³ ，有效离子电荷数从5

下降到2附近。对于电子密度高于3×10¹⁹m⁻³ 时的放电，多道轫致辐射测量系统在整个等离子

体区域都能采集到足够强的信号，可以测量有效电荷数的径向分布。

关键词: 轫致辐射, 阿贝尔反演, 有效离子电荷数

CLC Number:

O536

WEI Yan-ling, YU De-liang, LIU Liang. Measurement of effective ion charge using visible bremsstrahlung on HL-2A tokamak[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2014, 34(3): 193-199.

魏彦玲，余德良，刘亮. HL-2A 装置中利用可见光谱段轫致辐射测量有效离子电荷数[J]. 核聚变与等离子体物理, 2014, 34(3): 193-199.

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Measurement of effective ion charge using visible bremsstrahlung on HL-2A tokamak

HL-2A 装置中利用可见光谱段轫致辐射测量有效离子电荷数

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