| 摘要 |
A source of radiation is placed around the magnetohydrodynamic (MHD) generator, which ionizes either the flowing gas or the seed material with a lower ionisation energy (which may be a vapour of an alkali metal) carried by it. The spectral distribution of the radiation depends on the ionisation energy of the material to be ionized. Generally the radiation will be in the ultraviolet part of the spectrum. The gas must remain ionized until during all of its passage through the magnetohydrodynamic system i.e. during its passage between the field coils and between the electrodes. Therefore the ionizing radiation must illuminate all of this region. The ionizing radiation may be produced by discharge tubes, or by corona discharges from the electrodes, or a combination of both. |
