| タイトル | Heavy ion plasma confinement in an RF quadrupole trap |
| 本文（外部サイト） | http://hdl.handle.net/2060/19730001976 |
| 著者（英） | Major, F. G.; Schermann, J. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1971-07-01 |
| 言語 | eng |
| 内容記述 | The confinement of an electron free plasma in a pure quadrupole RF electric trap was considered. The ultimate goal was to produce a large density of mercury ions, in order to realize a trapped ion frequency standard using the hyperfine resonance of 199 Hg(+) at 40.7 GHz. An attempt was made to obtain an iodine plasma consisting of equal numbers of positive and negative ions of atomic iodine, the positive iodine ions, being susceptible to charge-exchange with mercury atoms, will produce the desired mercury ions. The experiment showed that the photoproduction of ions pairs in iodine using the necessary UV radiation occurs with a small cross-section, making it difficult to demonstrate the feasibility of space charge neutralization in a quadrupole trap. For this reason it was considered expedient to choose thallium iodide, which has a more favorable absorption spectrum (in the region of 2000 to 2100 A). The results indicate that, although the ionic recombination is a serious limiting factor, a considerable improvement can be obtained in practice for the density of trapped ions, with a considerable advantage in lifetimes for spectroscopic purposes. The ion pair formation by photoionization is briefly reviewed. |
| NASA分類 | PHYSICS, PLASMA |
| レポートNO | 73N10703
NASA-TM-X-65719
X-524-71-343 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/201955 |
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