| Title |
Development of Riken 28 GHz SC-ECRIS for Production of Intense Metal Ion Beam |
| Authors |
- T. Nakagawa, Y. Higurashi, T. Nagatomo, J. Ohnishi
RIKEN Nishina Center, Wako, Japan
|
| Abstract |
To produce intense metal ion beams (e.g. Ti¹³⁺, V¹²⁺,13+, U³⁵⁺ ) for super heavy element search and RIBF experiments at RIKEN, we tried to optimize the RIKEN 28 GHz SC-ECRIS performance. Based on the scaling low and 'high B mode' operation, we systematically measured the beam intensity of various heavy ions as a function of Binj, Br and Bext with 28 and 18 GHz microwaves. In these experiments, we observed that (1) optimum Binj>1.6~2 Bext, (2) optimum Br>1.2~1.4 Bext and (3) optimum Bext is dependent on the charge state and ion spices as described by scaling low. We also observed same tendency for 18 GHz liquid-He-free SC-ECRIS. Using this systematics, we obtained ~400μA of V¹³⁺ at the RF power of 2kW (28 GHz) and very low Bext (~1.4 T with 28 GHz). For long term operation (one month), we successfully produced very stable beam of 100~200 μA of V¹³⁺ ion. Following the success, we constructed new 28 GHz SC-ECRIS for super heavy element search experiments. In this contribution, we report the experimental results in detail and how to produce intense metal ion beams.
|
| Paper |
download TUA1.PDF [1.010 MB / 5 pages] |
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| Conference |
ECRIS2018, Catania, Italy |
| Series |
International Workshop on ECR Ion Sources (23rd) |
| Proceedings |
Link to full ECRIS2018 Proccedings |
| Session |
Status Reports and New Developments |
| Date |
11-Sep-18 09:00–10:50 |
| Main Classification |
Status reports and new development |
| Keywords |
ECR, ECRIS, heavy-ion, ion-source, experiment |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editors |
Volker RW Schaa (GSI, Darmstadt, Germany); Pietro Pisciotta (SINFN - Laboratori Nazionali del Sud, Catania, Italy) |
| ISBN |
978-3-95450-196-0 |
| Published |
January 2019 |
| Copyright |
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