Experimental techniques and performance of Λ-hypernuclear spectroscopy with the (e,e′K+) reaction

T. Gogami; C. Chen; Y. Fujii; O. Hashimoto; M. Kaneta; D. Kawama; T. Maruta; A. Matsumura; S. Nagao; S. N. Nakamura; Y. Okayasu; J. Reinhold; L. Tang; K. Tsukada; S. A. Wood; L. Yuan

doi:10.1016/j.nima.2018.05.042

Experimental techniques and performance of Λ-hypernuclear spectroscopy with the (e,e^′K⁺) reaction

T. Gogami, C. Chen, Y. Fujii, O. Hashimoto, M. Kaneta, D. Kawama, T. Maruta, A. Matsumura, S. Nagao, S. N. Nakamura, Y. Okayasu, J. Reinhold, L. Tang, K. Tsukada, S. A. Wood, L. Yuan

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The missing-mass spectroscopy of Λ hypernuclei via the (e,e^′K⁺) reaction has been developed through experiments at JLab Halls A and C in the last two decades. For the latest experiment, E05-115 in Hall C, we developed a new spectrometer system consisting of the HKS and HES; resulting in the best energy resolution (ΔE≃0.5-MeV FWHM) and B_Λ accuracy (ΔB_Λ≤0.2MeV) in Λ-hypernuclear reaction spectroscopy. This paper describes the characteristics of the (e,e^′K⁺) reaction compared to other reactions and experimental methods. In addition, the experimental apparatus, some of the important analyses such as the semi-automated calibration of absolute energy scale, and the performance achieved in E05-115 are presented.

Original language	English
Pages (from-to)	69-83
Number of pages	15
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	900
DOIs	https://doi.org/10.1016/j.nima.2018.05.042
Publication status	Published - 2018 Aug 21

Keywords

(e,eK) reaction
High accuracy energy calibration
Kaon detection
Magnetic spectrometer systems
Missing-mass spectroscopy
Λ hypernuclei

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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Gogami, T., Chen, C., Fujii, Y., Hashimoto, O., Kaneta, M., Kawama, D., Maruta, T., Matsumura, A., Nagao, S., Nakamura, S. N., Okayasu, Y., Reinhold, J., Tang, L., Tsukada, K., Wood, S. A., & Yuan, L. (2018). Experimental techniques and performance of Λ-hypernuclear spectroscopy with the (e,e^′K⁺) reaction. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 900, 69-83. https://doi.org/10.1016/j.nima.2018.05.042

Experimental techniques and performance of Λ-hypernuclear spectroscopy with the (e,e^′K⁺) reaction. / Gogami, T.; Chen, C.; Fujii, Y.; Hashimoto, O.; Kaneta, M.; Kawama, D.; Maruta, T.; Matsumura, A.; Nagao, S.; Nakamura, S. N.; Okayasu, Y.; Reinhold, J.; Tang, L.; Tsukada, K.; Wood, S. A.; Yuan, L.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 900, 21.08.2018, p. 69-83.

Research output: Contribution to journal › Article › peer-review

Gogami, T, Chen, C, Fujii, Y, Hashimoto, O, Kaneta, M, Kawama, D, Maruta, T, Matsumura, A, Nagao, S , Nakamura, SN, Okayasu, Y, Reinhold, J, Tang, L, Tsukada, K, Wood, SA & Yuan, L 2018, 'Experimental techniques and performance of Λ-hypernuclear spectroscopy with the (e,e^′K⁺) reaction', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 900, pp. 69-83. https://doi.org/10.1016/j.nima.2018.05.042

Gogami, T. ; Chen, C. ; Fujii, Y. ; Hashimoto, O. ; Kaneta, M. ; Kawama, D. ; Maruta, T. ; Matsumura, A. ; Nagao, S. ; Nakamura, S. N. ; Okayasu, Y. ; Reinhold, J. ; Tang, L. ; Tsukada, K. ; Wood, S. A. ; Yuan, L. / Experimental techniques and performance of Λ-hypernuclear spectroscopy with the (e,e^′K⁺) reaction. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2018 ; Vol. 900. pp. 69-83.

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title = "Experimental techniques and performance of Λ-hypernuclear spectroscopy with the (e,e′K+) reaction",

abstract = "The missing-mass spectroscopy of Λ hypernuclei via the (e,e′K+) reaction has been developed through experiments at JLab Halls A and C in the last two decades. For the latest experiment, E05-115 in Hall C, we developed a new spectrometer system consisting of the HKS and HES; resulting in the best energy resolution (ΔE≃0.5-MeV FWHM) and BΛ accuracy (ΔBΛ≤0.2MeV) in Λ-hypernuclear reaction spectroscopy. This paper describes the characteristics of the (e,e′K+) reaction compared to other reactions and experimental methods. In addition, the experimental apparatus, some of the important analyses such as the semi-automated calibration of absolute energy scale, and the performance achieved in E05-115 are presented.",

keywords = "(e,eK) reaction, High accuracy energy calibration, Kaon detection, Magnetic spectrometer systems, Missing-mass spectroscopy, Λ hypernuclei",

author = "T. Gogami and C. Chen and Y. Fujii and O. Hashimoto and M. Kaneta and D. Kawama and T. Maruta and A. Matsumura and S. Nagao and Nakamura, {S. N.} and Y. Okayasu and J. Reinhold and L. Tang and K. Tsukada and Wood, {S. A.} and L. Yuan",

note = "Funding Information: At first, we thank the JLab staffs of the physics, accelerator, and engineering divisions for support of the experiment. We also express our appreciation to all of members of HNSS (E89-009) and HKS (E01-011 and E05-115) Collaborations. We thank M. Sumihama and T. Miyoshi for their contributions to the early stage of the hypernuclear experiments at JLab Hall C. We thank teams led by P. Brindza and W. Kellner respectively for their large contributions to designs of detector frames and vacuum systems, and installation of the experimental equipment in JLab Hall C. We appreciate efforts on design and fabrication of the target system by I. Sugai, D. Meekins, and A. Shichijo. We thank N. Chiga for his technical supports at Tohoku University. We thank Research Center for Electron Photon Science, Tohoku University (ELPH), Cyclotron and Radioisotope Center, Tohoku University (CYRIC), and KEK-PS for giving us opportunities of performance tests for the detector and target systems. The HKS experimental program at JLab was supported by JSPS KAKENHI Grants No. 18H01219 , No. 17H01121 , No. 12002001 , No. 15684005 , No. 16GS0201 , Grant-in-Aid for JSPS fellow No. 12J04123 , JSPS Core-to-Core Program No. 21002 , and JSPS Strategic Young Researcher Overseas Visits Program for Accelerating Brain Circulation No. R2201 . This program was partially supported by JSPS and DAAD under the Japan–Germany Research Cooperative Program, and the Graduate Program on Physics for the Universe, Tohoku University (GP-PU). This work was supported by U.S. Department of Energy Contracts No. DE-AC05-84ER40150 , No. DE-AC05-06OR23177 , No. DE-FG02-99ER41065 , No. DE-FG02-97ER41047 , No. DE-AC02-06CH11357 , No. DE-FG02-00ER41110 , and No. DE-AC02-98CH10886 , and U.S.-NSF Contracts No. 013815 and No. 0758095 . ",

year = "2018",

month = aug,

day = "21",

doi = "10.1016/j.nima.2018.05.042",

language = "English",

volume = "900",

pages = "69--83",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

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TY - JOUR

T1 - Experimental techniques and performance of Λ-hypernuclear spectroscopy with the (e,e′K+) reaction

AU - Gogami, T.

AU - Chen, C.

AU - Fujii, Y.

AU - Hashimoto, O.

AU - Kaneta, M.

AU - Kawama, D.

AU - Maruta, T.

AU - Matsumura, A.

AU - Nagao, S.

AU - Nakamura, S. N.

AU - Okayasu, Y.

AU - Reinhold, J.

AU - Tang, L.

AU - Tsukada, K.

AU - Wood, S. A.

AU - Yuan, L.

N1 - Funding Information: At first, we thank the JLab staffs of the physics, accelerator, and engineering divisions for support of the experiment. We also express our appreciation to all of members of HNSS (E89-009) and HKS (E01-011 and E05-115) Collaborations. We thank M. Sumihama and T. Miyoshi for their contributions to the early stage of the hypernuclear experiments at JLab Hall C. We thank teams led by P. Brindza and W. Kellner respectively for their large contributions to designs of detector frames and vacuum systems, and installation of the experimental equipment in JLab Hall C. We appreciate efforts on design and fabrication of the target system by I. Sugai, D. Meekins, and A. Shichijo. We thank N. Chiga for his technical supports at Tohoku University. We thank Research Center for Electron Photon Science, Tohoku University (ELPH), Cyclotron and Radioisotope Center, Tohoku University (CYRIC), and KEK-PS for giving us opportunities of performance tests for the detector and target systems. The HKS experimental program at JLab was supported by JSPS KAKENHI Grants No. 18H01219 , No. 17H01121 , No. 12002001 , No. 15684005 , No. 16GS0201 , Grant-in-Aid for JSPS fellow No. 12J04123 , JSPS Core-to-Core Program No. 21002 , and JSPS Strategic Young Researcher Overseas Visits Program for Accelerating Brain Circulation No. R2201 . This program was partially supported by JSPS and DAAD under the Japan–Germany Research Cooperative Program, and the Graduate Program on Physics for the Universe, Tohoku University (GP-PU). This work was supported by U.S. Department of Energy Contracts No. DE-AC05-84ER40150 , No. DE-AC05-06OR23177 , No. DE-FG02-99ER41065 , No. DE-FG02-97ER41047 , No. DE-AC02-06CH11357 , No. DE-FG02-00ER41110 , and No. DE-AC02-98CH10886 , and U.S.-NSF Contracts No. 013815 and No. 0758095 .

PY - 2018/8/21

Y1 - 2018/8/21

N2 - The missing-mass spectroscopy of Λ hypernuclei via the (e,e′K+) reaction has been developed through experiments at JLab Halls A and C in the last two decades. For the latest experiment, E05-115 in Hall C, we developed a new spectrometer system consisting of the HKS and HES; resulting in the best energy resolution (ΔE≃0.5-MeV FWHM) and BΛ accuracy (ΔBΛ≤0.2MeV) in Λ-hypernuclear reaction spectroscopy. This paper describes the characteristics of the (e,e′K+) reaction compared to other reactions and experimental methods. In addition, the experimental apparatus, some of the important analyses such as the semi-automated calibration of absolute energy scale, and the performance achieved in E05-115 are presented.

AB - The missing-mass spectroscopy of Λ hypernuclei via the (e,e′K+) reaction has been developed through experiments at JLab Halls A and C in the last two decades. For the latest experiment, E05-115 in Hall C, we developed a new spectrometer system consisting of the HKS and HES; resulting in the best energy resolution (ΔE≃0.5-MeV FWHM) and BΛ accuracy (ΔBΛ≤0.2MeV) in Λ-hypernuclear reaction spectroscopy. This paper describes the characteristics of the (e,e′K+) reaction compared to other reactions and experimental methods. In addition, the experimental apparatus, some of the important analyses such as the semi-automated calibration of absolute energy scale, and the performance achieved in E05-115 are presented.

KW - (e,eK) reaction

KW - High accuracy energy calibration

KW - Kaon detection

KW - Magnetic spectrometer systems

KW - Missing-mass spectroscopy

KW - Λ hypernuclei

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JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

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