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Performance of the time-of-flight detector for a measurement of free fall of antihydrogen at the GBAR experiment

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Title: Performance of the time-of-flight detector for a measurement of free fall of antihydrogen at the GBAR experiment

Author(s): B.H. Kim; J.J. Choi; J.W. Hwang; S.K. Kim; Young Ju Ko; A. Lee; B.C. Lee; H. Lee; Jaison Lee; K.H. Park; D. Won

Subject: Antihydrogen, ; Gravity, ; Plastic scintillator, ; Time-of-flight detector

Journal: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, v.973, pp.164162

Abstract: © 2020 Elsevier B.V. The GBAR experiment is designed to measure the free fall acceleration of antihydrogen atoms almost at rest. We have developed a time-of-flight (TOF) detector for the measurement of free fall time and annihilation position of antihydrogen atoms as well as for the rejection of cosmic ray muons. A scintillator array as a part of the TOF detector was installed and tested at the GBAR experimental hall. The performance of the TOF detector studied by cosmic ray muons is reported in this paper