| Autor: |
R. Marsala, T. Provost, C.H. Skinner, B. Rais, H.W. Kugel, A. L. Roquemore |
| Rok vydání: |
2010 |
| Předmět: |
|
| Zdroj: |
The Review of scientific instruments. 81(10) |
| ISSN: |
1089-7623 |
| Popis: |
The first real-time detection of surface dust inside a tokamak was made using an electrostatic dust detector. A fine grid of interlocking circuit traces was installed in the NSTX vessel and biased to 50 V. Impinging dust particles created a temporary short circuit and the resulting current pulse was recorded by counting electronics. The techniques used to increase the detector sensitivity by a factor of ×10 000 to match NSTX dust levels while suppressing electrical pickup are presented. The results were validated by comparison to laboratory measurements, by the null signal from a covered detector that was only sensitive to pickup, and by the dramatic increase in signal when Li particles were introduced for wall conditioning purposes. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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