A liquid hydrogen target to fully characterize the new MEG II liquid xenon calorimeter

The MEG II experiment aims to improve the sensitivity to μ+→e+γ down to 6×10−14, surpassing the 4.2×10−13 UL by MEG. To achieve this sensitivity the detector performances need to be assessed and monitored via dedicated calibrations. To calibrate the Liquid Xenon Calorimeter near the signal energy (5...

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Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2023-04, Vol.1049, p.168020, Article 168020
Main Authors: Vitali, B., Papa, A., Baldini, A.M., Benmansour, H., Bianucci, S., Cei, F., Chiappini, M., Chiarello, G., Maso, G. Dal, Francesconi, M., Galli, L., Grassi, M., Grigoriev, D.N., Hildebrandt, M., Meuwly, M., Nicolò, D., Raffaelli, F., Schwendimann, P., Signorelli, G., Venturini, A.
Format: Article
Language:English
Subjects:
Calibration
Charge EXchange
Liquid hydrogen
Liquid Xe calorimeter
MEG II
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Summary:The MEG II experiment aims to improve the sensitivity to μ+→e+γ down to 6×10−14, surpassing the 4.2×10−13 UL by MEG. To achieve this sensitivity the detector performances need to be assessed and monitored via dedicated calibrations. To calibrate the Liquid Xenon Calorimeter near the signal energy (52.8 MeV), photons are produced through the Charge EXchange (CEX) process π−p→nπ0(→γγ). Here we present the liquid Hydrogen target used for the CEX run 2021, during the first MEG II physics run.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2023.168020