ECRIS2020 - List of Authors (Liu, Y.G.)

Paper	Title	Page
WEXZO01	High Intensity Ion Beam Extraction System for FECR
	Z. Shen, X. Fang, J.W. Guo, Z.H. Jia, Y.G. Liu, W. Lu, L.T. Sun, Y. Yang, X.Z. Zhang, H.W. Zhao IMP/CAS, Lanzhou, People’s Republic of China L.T. Sun UCAS, Beijing, People’s Republic of China
	To meet the beam requirements of High Intensity heavy ion Accelerator Facility (HIAF), the Institute of Modern Physics is developing a Fourth generation ECR ion source (FECR). Targeting at the operation frequency of 45 GHz, FECR is expected to produce very high intensity highly charged heavy ion beams, such as 1.0 emA ²³⁸U³⁵⁺, 2 emA ⁷⁸Kr¹⁹⁺, 10 emA ¹⁶O⁶⁺, etc. Based on the records with the 3rd generation ECR ion source operating at 24-28 GHz, the corresponding total drain current of FECR could reach 20-60 emA. To extract such high intensity multi-charged ion beams from the source with high beam quality and transmission efficiency, conventional diode or triode extraction system might not be suitable, and therefore a 4-electrode extraction system with a total extraction voltage of 50 kV is designed to mitigate the space charge influences and minimize the beam emittance growth in the extraction region. In this paper, a 3D model of the FECR extraction system is built using the IBSimu code. The electrode angles, voltages and electrode spacings are optimized for different ion beam conditions respectively. Beam properties comparison of various simulation conditions are presented.
	Slides WEXZO01 [7.712 MB]
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WEXZO02	³⁹Ar Enrichment System Based on a 2.45 GHz ECR Ion Source	128
	Z.H. Jia, X. Fang, Y.H. Guo, Q. Hu, Y.J. Li, Y.G. Liu, L.T. Sun, Q. Wu, Y. Yang, T.X. Zhan, J.Q. Zhang IMP/CAS, Lanzhou, People’s Republic of China W. Jiang HNLPSM, Hefei, People’s Republic of China Z.T. Lu USTC, SNST, Anhui, People’s Republic of China
	Funding: National Key Research and Development Project (contract No.2016YFA0302202). Aimed at improving the ATTA’s (Atom Trap Trace Analysis) dating efficiency with ³⁹Ar radioactive isotope, an isotope enrichment system has been developed at IMP (Institute of Modern Physics) to increase the abundance of ³⁹Ar in the incident sample gas. In this enrichment system, a 2.45 GHz ECR ion source was designed to ionize sample gas and produce isotopes beams with several mA, and the isotopes beam is transported and separated in the separation beam line, which is consisted of two quadrupoles and an analysis magnet. The separated isotopes are collected by a rotated aluminum foil target. According to the recent cross-checked results with ATTA, high enrichment factor of ³⁹Ar isotope has been successfully reached. This paper will give a general introduction to the platform setup. The isotope enrichment efficiency is the critical issue for such a platform and will be specially discussed.
	Slides WEXZO02 [1.799 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2020-WEXZO02
About •	Received ※ 29 September 2020 — Revised ※ 21 December 2020 — Accepted ※ 14 February 2021 — Issue date ※ 21 July 2021
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WEXZO03	Conceptual Design of an Electrostatic Trap for High Intensity Pulsed Beam	132
	W. Huang, Y.G. Liu, L.T. Sun, H.W. Zhao IMP/CAS, Lanzhou, People’s Republic of China L.T. Sun UCAS, Beijing, People’s Republic of China D.Z. Xie LBNL, Berkeley, California, USA
	Funding: China Scholarship Council (CSC) (No. 201904910324) Highly charged ion sources play an important role in the advancement of heavy ion accelerators worldwide. The beam requirements of highly charged heavy ions from new accelerators have driven the performance of ion sources to their limits and beyond. In parallel to developing new technologies to enhance the performance of ECR ion source, this paper presents a conceptual design of an ion trap aiming to convert a cw ion beam into a short beam pulse with high compression ratios. With an electron gun, a solenoid and a set of drift tubes, the injected ions will be trapped radially and axially. By manipulating the potential of drift tubes, ions can be accumulated with multiple injections and extracted at a fast or slow scheme. This paper presents the simulation and design results of this ion trap prototype.
	Slides WEXZO03 [0.910 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2020-WEXZO03
About •	Received ※ 21 September 2020 — Revised ※ 01 January 2021 — Accepted ※ 14 April 2021 — Issue date ※ 14 July 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

WEXZO01

High Intensity Ion Beam Extraction System for FECR

Z. Shen, X. Fang, J.W. Guo, Z.H. Jia, Y.G. Liu, W. Lu, L.T. Sun, Y. Yang, X.Z. Zhang, H.W. Zhao
IMP/CAS, Lanzhou, People’s Republic of China
L.T. Sun
UCAS, Beijing, People’s Republic of China

To meet the beam requirements of High Intensity heavy ion Accelerator Facility (HIAF), the Institute of Modern Physics is developing a Fourth generation ECR ion source (FECR). Targeting at the operation frequency of 45 GHz, FECR is expected to produce very high intensity highly charged heavy ion beams, such as 1.0 emA ²³⁸U³⁵⁺, 2 emA ⁷⁸Kr¹⁹⁺, 10 emA ¹⁶O⁶⁺, etc. Based on the records with the 3rd generation ECR ion source operating at 24-28 GHz, the corresponding total drain current of FECR could reach 20-60 emA. To extract such high intensity multi-charged ion beams from the source with high beam quality and transmission efficiency, conventional diode or triode extraction system might not be suitable, and therefore a 4-electrode extraction system with a total extraction voltage of 50 kV is designed to mitigate the space charge influences and minimize the beam emittance growth in the extraction region. In this paper, a 3D model of the FECR extraction system is built using the IBSimu code. The electrode angles, voltages and electrode spacings are optimized for different ion beam conditions respectively. Beam properties comparison of various simulation conditions are presented.

Slides WEXZO01 [7.712 MB]

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEXZO02

³⁹Ar Enrichment System Based on a 2.45 GHz ECR Ion Source

128

Z.H. Jia, X. Fang, Y.H. Guo, Q. Hu, Y.J. Li, Y.G. Liu, L.T. Sun, Q. Wu, Y. Yang, T.X. Zhan, J.Q. Zhang
IMP/CAS, Lanzhou, People’s Republic of China
W. Jiang
HNLPSM, Hefei, People’s Republic of China
Z.T. Lu
USTC, SNST, Anhui, People’s Republic of China

Funding: National Key Research and Development Project (contract No.2016YFA0302202).
Aimed at improving the ATTA’s (Atom Trap Trace Analysis) dating efficiency with ³⁹Ar radioactive isotope, an isotope enrichment system has been developed at IMP (Institute of Modern Physics) to increase the abundance of ³⁹Ar in the incident sample gas. In this enrichment system, a 2.45 GHz ECR ion source was designed to ionize sample gas and produce isotopes beams with several mA, and the isotopes beam is transported and separated in the separation beam line, which is consisted of two quadrupoles and an analysis magnet. The separated isotopes are collected by a rotated aluminum foil target. According to the recent cross-checked results with ATTA, high enrichment factor of ³⁹Ar isotope has been successfully reached. This paper will give a general introduction to the platform setup. The isotope enrichment efficiency is the critical issue for such a platform and will be specially discussed.

Slides WEXZO02 [1.799 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2020-WEXZO02

About •

Received ※ 29 September 2020 — Revised ※ 21 December 2020 — Accepted ※ 14 February 2021 — Issue date ※ 21 July 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEXZO03

Conceptual Design of an Electrostatic Trap for High Intensity Pulsed Beam

132

W. Huang, Y.G. Liu, L.T. Sun, H.W. Zhao
IMP/CAS, Lanzhou, People’s Republic of China
L.T. Sun
UCAS, Beijing, People’s Republic of China
D.Z. Xie
LBNL, Berkeley, California, USA

Funding: China Scholarship Council (CSC) (No. 201904910324)
Highly charged ion sources play an important role in the advancement of heavy ion accelerators worldwide. The beam requirements of highly charged heavy ions from new accelerators have driven the performance of ion sources to their limits and beyond. In parallel to developing new technologies to enhance the performance of ECR ion source, this paper presents a conceptual design of an ion trap aiming to convert a cw ion beam into a short beam pulse with high compression ratios. With an electron gun, a solenoid and a set of drift tubes, the injected ions will be trapped radially and axially. By manipulating the potential of drift tubes, ions can be accumulated with multiple injections and extracted at a fast or slow scheme. This paper presents the simulation and design results of this ion trap prototype.

Slides WEXZO03 [0.910 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2020-WEXZO03

About •

Received ※ 21 September 2020 — Revised ※ 01 January 2021 — Accepted ※ 14 April 2021 — Issue date ※ 14 July 2022

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)