Abstract
The MEG II experiment at Paul Scherrer Institut in Switzerland will search for the lepton flavour violating muon decay, \(\mu ^+\rightarrow e^+\gamma \), with a sensitivity of \(4\times 10^{-14}\) improving the existing limit of an order of magnitude. In 2016, we finished the construction of the MEG II Timing Counter, the subdetector dedicated to the measurement of the positron emission time. The first one-fourth of it was installed in the experimental area and we performed a pilot run with the MEG II beam of \(7\times 10^{7}\mu ^+/\)s. The timing resolution reached the design value improving by a factor of two compared to MEG.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Notes
- 1.
SAINT–GOBAIN, BC422, 40 (50) \(\times \) 120 \(\times \) 5 mm\(^3\).
- 2.
AdvanSiD, ASD-NUV3S-P High-Gain, 3 \(\times \) 3 mm\(^2\), 50 \(\times \) 50 \(\upmu \)m\(^2\), V\(_{\mathrm {breakdown}}\sim \)24 V.
- 3.
\(\sim \)70 ps in MEG.
- 4.
The multiple timing resolution is estimated as \(\sigma (N_{\mathrm {hit}})=\sqrt{\frac{\sigma ^2_{\mathrm {single}}}{N_{\mathrm {hit}}}+\sigma ^2_{\mathrm {const}}}\) where \(N_{\mathrm {hit}}\) is the number of hits.
References
Baldini, A.M., et al., (MEG Collaboration): Search for the lepton flavour violating decay \(\mu ^+\rightarrow \rm e^+\gamma \) with the full dataset of the MEG experiment. Eur. Phys. J. C 76, 434 (2016)
Ritt, S.: The DRS chip: cheap waveform digitizing in the GHz range. Nucl. Instr. Meth. A 518, 470–471 (2004)
Bardelli, L., Poggi, G., Bini, M., et al.: Time measurements by means of digital sampling techniques: a study case of 100 ps FWHM time resolution with a 100MSample/s, 12 bit digitizer. Nucl. Instr. Meth. A 521, 480–492 (2004)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Nakao, M. et al. (2018). Results from Pilot Run for MEG II Positron Timing Counter. In: Liu, ZA. (eds) Proceedings of International Conference on Technology and Instrumentation in Particle Physics 2017. TIPP 2017. Springer Proceedings in Physics, vol 213. Springer, Singapore. https://doi.org/10.1007/978-981-13-1316-5_44
Download citation
DOI: https://doi.org/10.1007/978-981-13-1316-5_44
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-13-1315-8
Online ISBN: 978-981-13-1316-5
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)