Abstract
This paper describes the characteristic and the physical picture of a parasitic disturbance, which can occur because of the drift motion of probing beam ions trapped at the plasma edge, in active neutral particle measurements for magnetically confined fusion devices. In the JT-60 experiments, the disturbance is observed under the condition in which a neutral particle analyzer views the high recycling region, i.e., the divertor, and the occurrence of the parasitic effect is substantially dependent on the safety factor at the plasma boundary. Also discussed are the validity of our interpretation and some measures for avoiding the disturbance.
| Original language | English |
|---|---|
| Pages (from-to) | 760-764 |
| Number of pages | 5 |
| Journal | Japanese journal of applied physics |
| Volume | 29 |
| Issue number | 4 R |
| DOIs | |
| Publication status | Published - 1990 Apr |
| Externally published | Yes |
Keywords
- Active beam scattering
- Banana orbit
- Beam probe
- JT-60
- Neutral particle diagnostic
- Tokamak
- Trapped particle
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)
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Tobita, K., Kusama, Y., Itoh, T., Nemoto, M., Takeuchi, H., & Tsukahara, Y. (1990). A parasitic effect in neutral particle diagnostic using a helium probing beam. Japanese journal of applied physics, 29(4 R), 760-764. https://doi.org/10.1143/JJAP.29.760