Novel compact electrostatic ion-current detector using a self-collection method for secondary-electron suppression
- Plasma Research Centre, University of Tsukuba, Ibaraki 305-8577 (Japan)
For the purpose of observations of the absolute values of ion-end-loss currents for plasma confinement studies in open-field plasma devices, a compact-sized electrostatic ion-current detector is proposed on the basis of a self-collection principle for suppressing the effects of secondary-electron emission from a metal collector. For employing this specific method, it is worth noting that no further additional magnetic systems except ambient open-ended magnetic fields are required for the proposed detector structure. This characteristic property provides a compactness of the total detector system and availability for its use in a plasma confinement device without disturbing plasma-confining magnetic fields. The detector consists of a set of parallel metal plates with respect to lines of ambient magnetic forces of a plasma device for analyzing incident ion currents along with a grid for shielding the collector against strays due to the metal-plate biasing. Availability of the detector is clearly demonstrated in the GAMMA 10 plasma experiments.
- OSTI ID:
- 20636706
- Journal Information:
- Review of Scientific Instruments, Vol. 75, Issue 10; Other Information: DOI: 10.1063/1.1788861; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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