Impact of beam ions on α-particle measurements by collective Thomson scattering in ITER

被引：11
|
作者：
Egedal, J [1 ]
Bindslev, H
Budny, RV
Woskov, P
机构：
[1] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
[2] EURATOM, Riso Natl Lab, DK-4000 Roskilde, Denmark
[3] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA
来源：
NUCLEAR FUSION | 2005年 / 45卷 / 03期
关键词：
D O I：
10.1088/0029-5515/45/3/005
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：
Collective Thomson scattering (CTS) has been proposed as a viable diagnostic for characterizing fusion born a-distributions in ITER. However, the velocities of the planned 1 MeV deuterium heating beam ions in 1TER are similar to that of fusion born a-particles and may therefore mask the measurements of the fusion products. We apply a new technique for calculating the orbit averaged source, (S), of beam ions for various ITER scenarios. With the known (S) Fokker-Planck modelling is applied to characterize the beam ions during the slowing down process. Theoretical CTS signals for both beam ions and the alpha-particles are calculated. Our investigations show that the CTS measurements of alpha-particles will not be masked by the presence of the beam ions in H-mode plasmas. In lower density reversed shear plasmas, only a part of the CTS alpha-particle spectrum will be perturbed.
引用
收藏
页码：191 / 200
页数：10
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