| Autor: |
Mank, G., Schorn, R. P., Hintz, E., Papenbreer, R., Keller, H. M., Korzec, D., Bansky, J., Engemann, J. |
| Předmět: |
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| Zdroj: |
Review of Scientific Instruments; Apr92, Vol. 63 Issue 4, p2544, 3p |
| Abstrakt: |
In order to implement a new setup for neutral-beam activated impact excitation spectroscopy at the nuclear fusion experiment "TEXTOR" (Tokamak Experiment for Technology Oriented Research) a 2.45 GHz ECR multicusp ion source was built. Special emphasis was given to extract an intense He[sup +]-ion beam, which will be used in the forthcoming experiment. After neutralization the slow (2.2 × 10[sup 7] cm/s, 1 keV) He atoms are injected into the tokamak plasma. Necessarily the atom beam has to have a small divergence. To optimize the extraction optics, calculations concerning the mtiltihole extraction aperture have been made, taking different ECR-plasma parameters into account. The divergence shows a strong dependence on the extracted beam current density (> 5 mA/cm²) and the chosen optics. The ion source has to be operated in a pulsed mode (max. 5 kHz, duty cycle 50%) due to experimental requirements. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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