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30-ps time resolution with segmented scintillation counter for MEG II.
- Source :
-
Nuclear Instruments & Methods in Physics Research Section A . Feb2017, Vol. 845, p507-510. 4p. - Publication Year :
- 2017
-
Abstract
- A new timing detector has been developed to measure ∼50 MeV/c positrons with a time resolution of σ t ≃ 30 ps in the MEG II experiment. The detector are segmented into 512 scintillation counters, each of which consists of 120 × ( 40 or 50 ) × 5 mm 3 size BC-422 and two arrays of six AdvanSiD silicon photomultipliers. The single-counter resolutions are measured to be 70–80 ps. The counter layout is optimized to get the maximum number of hit counters (on average 9 for signal positrons). This multiple-counters measurement leads to a significant improvement in the time resolution down to 30 ps. Using the first one-fourth (128) counters, a pilot run was carried out using the MEG II beam of 7 × 10 7 μ + / s and the basic functionality was tested. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01689002
- Volume :
- 845
- Database :
- Academic Search Index
- Journal :
- Nuclear Instruments & Methods in Physics Research Section A
- Publication Type :
- Academic Journal
- Accession number :
- 121221582
- Full Text :
- https://doi.org/10.1016/j.nima.2016.06.072