| 研究実績の概要 |
We have successfully tested the use of ion surfing rf-carpet, both online and offline. The initial offline results were published last year. Newer offline results have been published in the Master Thesis of Arai Fumiya at Tsukuba University. These newer results will be submitting to scientific journals in coming months.
The offline tests have shown that we can use higher pressure than expected in a large gas cell to be used online at RIKEN. The large gas cell will be the basis of a low-energy nuclear physics facility and higher pressure will mean higher efficiency.
The new rf-carpet has been used in online commissioning of a small gas cell for fusion-evaporation reaction products. The goal of this facility is to measure trans-Uranium elements, eventually providing anchor points for hot-fusion reactions which will aid in precise determination of new super-heavy elements.
The new rf-carpet tested online provided a very good efficiency of more than 30%, while providing a good differential pumping barrier. The initial results we hope to submit to scientific journals soon.
In addition to these studies, the work on the rf-carpet as part of this grant inspired the development of a new type of ion cooler-and-buncher. This so-called gas-cell cooler-buncher has been funded in its own right and promises exciting opportunities for use of low-energy beams in the near future.
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