15-20 October 2017
CERN
Europe/Zurich timezone

Preliminary Design of a Hybrid Ion Source for $\text{7Li}^3^+$ Generation

16 Oct 2017, 16:30
2h 30m
CERN

CERN

Centre international de Conférence Genève (CICG). http://www.cicg.ch/
Poster presentation Production of highly charged ion beams Poster Session 1

Speaker

Jingfeng Zhang (Peking University)

Description

The p(7Li,n)7Be reaction can be used to produce forward neutron beam based on the principle of inverse kinematics, which is useful to reduce the background of the measurement of prompt fission γ-ray emission from fast neutron induced fission of $^{235}$U and 238U. A hybrid $\text{7Li3}^+$ ion source is going to be adopted to produce 10 eμA beam for this experiment. Previously a high B field 2.45 GHz ECR (Electron Cyclotron Resonance) ion source has been built at Peking University (PKU). Oxygen gas was used in the preliminary experiment. About 273 eμA $\text{O3}^+$ and 446 eμA $\text{O2}^+$ were produced with the high B source. This indicates the feasibility of producing high charge state ions with lower frequency and high B field. Recently, a tandem-type hybrid ion source with the combination of a 2.45 GHz ECR ion source and a hot surface ionization source was proposed for $\text{Li3}^+$ ion generation. An oven will be used to produce lithium vapor and the surface ionization source converts the lithium atoms into $\text{Li}^+$ ions. Then $\text{Li}^+$ will be striped into $\text{Li3}^+$ in ECR region. The configuration of magnetic field is min-B and the radial magnets are designed in a novel fixing structure, which effectively protect the radial magnets from heating. Details will be presented in the paper.

Primary authors

Mrs Shixiang Peng (Institute of Heavy Ion Physics, School of Physics, Peking University ) Jingfeng Zhang (Peking University) Mr Haitao Ren Mr Yuan Xu Mr Ailin Zhang Mr Tao Zhang Wenbin Wu Ms Jiamei Wen (Peking University) Mr Zhiyu Guo Mr Jiaer Chen

Presentation materials