1-6 September 2019
Lanzhou
Asia/Shanghai timezone
The deadline for the ICIS 2019 manuscript submission is extended to September 30. All oral presentations have been uploaded on the page of 'timetable'.

Production of intense metal ion beam with RIKEN 28 GHz SC-ECRIS

3 Sep 2019, 09:30
20m
Lanzhou

Lanzhou

No. 1 Beibinhe East Road, Chengguan District, Lanzhou
Contributed oral

Speaker

takahide Nakagawa (RIKEN)

Description

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. We systematically measured the beam intensity of various heavy ions as a function of Binj, Br and Bext with 14, 18 and 28 GHz microwaves for various heavy ions. 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.
Using this systematics, we obtained ~400emicroA of V13+ at low RF power of ~2kW and very low magnetic field (Bext~1.4 T with 28 GHz). For long term operation (one month), we successfully produced very stable beam of 100~200 e micro A of V13+ ion. Based on the systematics, we also produced ~225 e micro A of U33+ ion beam and ~200 e micro A of U35+ ion beam at only 2.2~2.6 kW of RF power.
In this contribution, we discuss the mechanism to obtain these systematics using simple model calculation. And we report the experimental results and how to produce intense metal ion (Ti, V, and U ions) beams in detail.

Category of your contribution Production of highly charged ion beams

Primary authors

takahide Nakagawa (RIKEN) Dr Yoshihide Higurashi (RIKEN) Dr Takashi Nagatomo (RIKEN) Mr Jun-ichi Ohnishi (RIKEN)

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