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Title: Characterization of a double Time-Of-Flight detector system for accurate velocity measurement in a storage ring using laser beams

Abstract

The Isochronous Mass Spectrometry (IMS) is a powerful tool for mass measurements of exotic nuclei with half-lives as short as several tens of micro-seconds in storage rings. In order to improve the mass resolving power while preserving the acceptance of the storage ring, the IMS with two Time-Of-Flight (TOF) detectors has been implemented at the storage ring CSRe in Lanzhou, China. Additional velocity information beside the revolution time in the ring can be obtained for each of the stored ions by using the double TOF detector system. In this paper, we introduced a new method of using a 658 nm laser range finder and a short-pulsed ultra-violet laser to directly measure the distance and time delay difference between the two TOF detectors which were installed inside the 10 -11 mbar vacuum chambers. Here, the results showed that the distance between the two ultra-thin carbon foils of the two TOF detectors was ranging from 18032.5 mm to 18035.0 mm over a measurable area of 20x20 mm 2.

Authors:
 [1];  [2];  [3];  [3];  [3];  [3];  [3];  [4];  [3];  [4];  [4];  [3];  [5];  [3]
  1. Chinese Academy of Sciences, Lanzhou (China); Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Chinese Academy of Sciences, Lanzhou (China); GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt (Germany)
  3. Chinese Academy of Sciences, Lanzhou (China)
  4. Chinese Academy of Sciences, Lanzhou (China); Univ. of Chinese Academy of Sciences, Beijing (China)
  5. GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt (Germany)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Key Research and Development Program of China; European Research Council (ERC); National Basic Research Program of China; USDOE
OSTI Identifier:
1531162
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 931; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
TOF detectors; laser range-finder; ps-pulsed UV laser; ultra-high vacuum; ultra-thin carbon foil; velocity measurement

Citation Formats

Yan, Xin -Liang, Chen, Rui -Jiu, Wang, Meng, Yuan, You -Jin, Yuan, Jian -Dong, Wang, Shao -Ming, Cai, Guo -Zhu, Zhang, Min, Lu, Zi -Wei, Fu, Chao -Yi, Zhou, Xu, Zhao, Dong -Mei, Litvinov, Yuri A., and Zhang, Yu -Hu. Characterization of a double Time-Of-Flight detector system for accurate velocity measurement in a storage ring using laser beams. United States: N. p., 2019. Web. doi:10.1016/j.nima.2019.03.058.
Yan, Xin -Liang, Chen, Rui -Jiu, Wang, Meng, Yuan, You -Jin, Yuan, Jian -Dong, Wang, Shao -Ming, Cai, Guo -Zhu, Zhang, Min, Lu, Zi -Wei, Fu, Chao -Yi, Zhou, Xu, Zhao, Dong -Mei, Litvinov, Yuri A., & Zhang, Yu -Hu. Characterization of a double Time-Of-Flight detector system for accurate velocity measurement in a storage ring using laser beams. United States. doi:10.1016/j.nima.2019.03.058.
Yan, Xin -Liang, Chen, Rui -Jiu, Wang, Meng, Yuan, You -Jin, Yuan, Jian -Dong, Wang, Shao -Ming, Cai, Guo -Zhu, Zhang, Min, Lu, Zi -Wei, Fu, Chao -Yi, Zhou, Xu, Zhao, Dong -Mei, Litvinov, Yuri A., and Zhang, Yu -Hu. Fri . "Characterization of a double Time-Of-Flight detector system for accurate velocity measurement in a storage ring using laser beams". United States. doi:10.1016/j.nima.2019.03.058.
@article{osti_1531162,
title = {Characterization of a double Time-Of-Flight detector system for accurate velocity measurement in a storage ring using laser beams},
author = {Yan, Xin -Liang and Chen, Rui -Jiu and Wang, Meng and Yuan, You -Jin and Yuan, Jian -Dong and Wang, Shao -Ming and Cai, Guo -Zhu and Zhang, Min and Lu, Zi -Wei and Fu, Chao -Yi and Zhou, Xu and Zhao, Dong -Mei and Litvinov, Yuri A. and Zhang, Yu -Hu},
abstractNote = {The Isochronous Mass Spectrometry (IMS) is a powerful tool for mass measurements of exotic nuclei with half-lives as short as several tens of micro-seconds in storage rings. In order to improve the mass resolving power while preserving the acceptance of the storage ring, the IMS with two Time-Of-Flight (TOF) detectors has been implemented at the storage ring CSRe in Lanzhou, China. Additional velocity information beside the revolution time in the ring can be obtained for each of the stored ions by using the double TOF detector system. In this paper, we introduced a new method of using a 658 nm laser range finder and a short-pulsed ultra-violet laser to directly measure the distance and time delay difference between the two TOF detectors which were installed inside the 10-11 mbar vacuum chambers. Here, the results showed that the distance between the two ultra-thin carbon foils of the two TOF detectors was ranging from 18032.5 mm to 18035.0 mm over a measurable area of 20x20 mm2.},
doi = {10.1016/j.nima.2019.03.058},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 931,
place = {United States},
year = {2019},
month = {4}
}

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This content will become publicly available on April 5, 2020
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