Journal Article

GSI-2020-01230

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Development and operation of an electrostatic time-of-flight detector for the Rare RI storage Ring

Nagae, D. (Corresponding author) ; Abe, Y. ; Okada, S. ; Omika, S. ; Wakayama, K. ; Hosoi, S. ; Suzuki, S. ; Moriguchi, T. ; Amano, M. ; Kamioka, D. ; Ge, Z. ; Naimi, S. ; Suzaki, F. ; Tadano, N. ; Igosawa, R. ; Inomata, K. ; Arakawa, H. ; Nishimuro, K. ; Fujii, T. ; Mitsui, T. ; Yanagisawa, Y. ; Baba, H. ; Michimasa, S. ; Ota, S. ; Lorusso, G. ; Litvinov, Y.GSI* ; Ozawa, A. ; Uesaka, T. ; Yamaguchi, T. ; Yamaguchi, Y. ; Wakasugi, M.

2021
North-Holland Publ. Co. Amsterdam

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Please use a persistent id in citations: doi:10.1016/j.nima.2020.164713

Report No.: arXiv:2011.02479

Abstract: An electrostatic time-of-flight detector named E-MCP has been developed for quick diagnostics of circulating beam and timing measurement in mass spectrometry at the Rare-RI Ring in RIKEN. The E-MCP detector consists of a conversion foil, potential grids, and a microchannel plate. Secondary electrons are released from the surface of the foil when a heavy ion hits it. The electrons are accelerated and deflected by 90$^\circ$ toward the microchannel plate by electrostatic potentials. A thin carbon foil and a thin aluminum-coated mylar foil were used as conversion foils. We obtained time resolutions of 69(1) ps and 43(1) ps (standard deviation) for a $^{84}$Kr beam at an energy of 170 MeV/u when using the carbon and the aluminum-coated mylar foils, respectively. A detection efficiency of approximately 90% was obtained for both foils. The E-MCP detector equipped with the carbon foil was installed inside the Rare-RI Ring to confirm particle circulation within a demonstration experiment on mass measurements of nuclei around $^{78}$Ge produced by in-flight fission of uranium beam at the RI Beam Factory in RIKEN. Periodic time signals from circulating ions were clearly observed. Revolution times for $^{78}$Ge, $^{77}$Ga, and $^{76}$Zn were obtained. The results confirmed successful circulation of the short-lived nuclei inside the Rare-RI Ring.

Note: Nuclear Inst. and Methods in Physics Research, A 986 (2021) 164713

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Contributing Institute(s):

1. Atomphysik (ATP)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)

Experiment(s):

1. External experiment at external facility/ no experiment at GSI (POF3; other)

Appears in the scientific report 2021

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Database coverage:
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