COOL2019 - List of Authors (Ma, X.M.)

Paper

Title

Page

The Electron Cooling System for the HIAF Project in China

14

L.J. Mao, J. Li, H.J. Lu, X.M. Ma, M.T. Tang, X.D. Yang, L.X. Zhao, Y.B. Zhou
IMP/CAS, Lanzhou, People’s Republic of China

A classical 450keV magnetized electron cooling system is proposed to boost the luminosity of high-density internal targets experiment in the spectrometer ring at HIAF. Electron cooling will provide highest phase space density of the stored highly charged heavy ion beams and compensate beam heating during internal target experiments. In addition, it will be used to suppress the beam loss in the deceleration mode. In this paper, the technical design of the electron cooling system is reported. The manufacturing of the key components such as the electron gun and collector is described. The problems of the construction will be discussed.

Slides MOZ01 [13.308 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2019-MOZ01

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paper received ※ 23 September 2019 paper accepted ※ 18 October 2019 issue date ※ 01 November 2019

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MOA01

Dielectronic Recombination of Na-like Kr²⁵⁺ at the Cooler Storage Ring CSRm

Z. Huang, L.J. Dou, N. Khan, J. Li, X.M. Ma, X. Ma, L.J. Mao, R.S. Mao, M.T. Tang, H.B. Wang, W.Q. Wen, J.X. Wu, J.C. Yang, D.Y. Yin, Y.J. Yuan, D. Zhao, X. Zhu
IMP/CAS, Lanzhou, People’s Republic of China
N.R. Badnell
USTRAT/SUPA, Glasgow, United Kingdom
C.Y. Chen
Fudan University, Shanghai, People’s Republic of China
W.L. Ma, S.X. Wang, L.F. Zhu
USTC, Hefei, Anhui, People’s Republic of China
S. Preval
University of Leicester, Department of Physics and Astronomy, Leicester, United Kingdom

Funding: Partly supported by the National Key R&D Program of China, Grant N.2017YFA0402300, the National Natural Science Foundation of China, N.11320101003, 91336102, U1732133, 11611530684.
Based on the successful DR measurement of Be-like Ar¹⁴+* and Ca¹⁶+** at the cooler storage ring CSRm, the absolute electron-ion recombination rate coefficients for Na-like Kr²⁵+ ions have been determined at the cooler storage ring CSRm at the Institute of Modern Physics in Lanzhou, China. In the electron-ion collision energy range 0-70 eV resonances due to 3s-3p,3d (DeltaN = 0) and 3s-4l (DeltaN = 1) core excitation were detected. The resonant energies and strengths were obtained by fitting to the spectrum with a anisotropic electron-energy distribution and compared to the calculated ones by using a relativistic configuration interaction flaxcible atomic code (FAC) and the distorted-wave collision package AUTOSTRUCTURE. The merged-beams recombination rate coefficients are then convolved with a Maxwellian-boltzmann distribution to obtain the temperature dependent plasma recombination rate coefficient (PRRC) within the temperature range 10³-10⁸ K.
*Z.K. Huang, W.Q. Wen, X. Xu, et al., Astrophys J Suppl S, 2018; 235, 2.
**S.X. Wang, X. Xu, Z.K. Huang, et al., The Astrophysical Journal, 2018; 862, 134.

Slides MOA01 [6.897 MB]

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THB01

Design of an 80 keV Electron Target at the Spectrometry Ring

J. Li, Z. Huang, H.J. Lu, X.M. Ma, X. Ma, L.J. Mao, M.T. Tang, H.B. Wang, S.X. Wang, W.Q. Wen, K.M. Yan, J.C. Yang, X.D. Yang, Y.J. Yuan, H.W. Zhao, L.X. Zhao, Y.B. Zhou
IMP/CAS, Lanzhou, People’s Republic of China

An electron target with the maximum energy of 80 keV is designed for high precision measurement in dielectronic recombination experiment at the Spectrometry Ring at the High Intensity heavy ion Accelerator Facility.

Slides THB01 [7.532 MB]

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Paper	Title	Page
MOZ01	The Electron Cooling System for the HIAF Project in China	14
	L.J. Mao, J. Li, H.J. Lu, X.M. Ma, M.T. Tang, X.D. Yang, L.X. Zhao, Y.B. Zhou IMP/CAS, Lanzhou, People’s Republic of China
	A classical 450keV magnetized electron cooling system is proposed to boost the luminosity of high-density internal targets experiment in the spectrometer ring at HIAF. Electron cooling will provide highest phase space density of the stored highly charged heavy ion beams and compensate beam heating during internal target experiments. In addition, it will be used to suppress the beam loss in the deceleration mode. In this paper, the technical design of the electron cooling system is reported. The manufacturing of the key components such as the electron gun and collector is described. The problems of the construction will be discussed.
	Slides MOZ01 [13.308 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2019-MOZ01
About •	paper received ※ 23 September 2019 paper accepted ※ 18 October 2019 issue date ※ 01 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOA01	Dielectronic Recombination of Na-like Kr²⁵⁺ at the Cooler Storage Ring CSRm
	Z. Huang, L.J. Dou, N. Khan, J. Li, X.M. Ma, X. Ma, L.J. Mao, R.S. Mao, M.T. Tang, H.B. Wang, W.Q. Wen, J.X. Wu, J.C. Yang, D.Y. Yin, Y.J. Yuan, D. Zhao, X. Zhu IMP/CAS, Lanzhou, People’s Republic of China N.R. Badnell USTRAT/SUPA, Glasgow, United Kingdom C.Y. Chen Fudan University, Shanghai, People’s Republic of China W.L. Ma, S.X. Wang, L.F. Zhu USTC, Hefei, Anhui, People’s Republic of China S. Preval University of Leicester, Department of Physics and Astronomy, Leicester, United Kingdom
	Funding: Partly supported by the National Key R&D Program of China, Grant N.2017YFA0402300, the National Natural Science Foundation of China, N.11320101003, 91336102, U1732133, 11611530684. Based on the successful DR measurement of Be-like Ar¹⁴+* and Ca¹⁶+** at the cooler storage ring CSRm, the absolute electron-ion recombination rate coefficients for Na-like Kr²⁵+ ions have been determined at the cooler storage ring CSRm at the Institute of Modern Physics in Lanzhou, China. In the electron-ion collision energy range 0-70 eV resonances due to 3s-3p,3d (DeltaN = 0) and 3s-4l (DeltaN = 1) core excitation were detected. The resonant energies and strengths were obtained by fitting to the spectrum with a anisotropic electron-energy distribution and compared to the calculated ones by using a relativistic configuration interaction flaxcible atomic code (FAC) and the distorted-wave collision package AUTOSTRUCTURE. The merged-beams recombination rate coefficients are then convolved with a Maxwellian-boltzmann distribution to obtain the temperature dependent plasma recombination rate coefficient (PRRC) within the temperature range 10³-10⁸ K. Z.K. Huang, W.Q. Wen, X. Xu, et al., Astrophys J Suppl S, 2018; 235, 2. *S.X. Wang, X. Xu, Z.K. Huang, et al., The Astrophysical Journal, 2018; 862, 134.
	Slides MOA01 [6.897 MB]
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THB01	Design of an 80 keV Electron Target at the Spectrometry Ring
	J. Li, Z. Huang, H.J. Lu, X.M. Ma, X. Ma, L.J. Mao, M.T. Tang, H.B. Wang, S.X. Wang, W.Q. Wen, K.M. Yan, J.C. Yang, X.D. Yang, Y.J. Yuan, H.W. Zhao, L.X. Zhao, Y.B. Zhou IMP/CAS, Lanzhou, People’s Republic of China
	An electron target with the maximum energy of 80 keV is designed for high precision measurement in dielectronic recombination experiment at the Spectrometry Ring at the High Intensity heavy ion Accelerator Facility.
	Slides THB01 [7.532 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)