The study of time calibration for upgraded end cap TOF of BESIII

Abstract

Purpose The end cap time of flight at Beijing Spectrometer is upgraded with multi-gap resistive plate chamber technology in order to improve the charged particle identification capability. The time-over-threshold is used for the time slewing correction instead of the signal amplitude. Methods The correlation of the multi-peak time-over-threshold and the hit position along the strip of the charged particle is investigated. Implementation of the off-line data calibration method is discussed in detail. Results and conclusion The overall time resolution for pions with momentum around 0.8 GeV/c is about 65 ps.

Measurement of the Dynamics of the Decays Ds+→η(′)eAblikim1, Ачасов2, Ahmed3 et al. 2019Phys. Rev. Lett.Self Cite342220View full textAdd to dashboardCite

“…[17]. For the data used in this Letter, the end cap time-of-flight system was upgraded with multigap resistive plate chambers with a time resolution of 60 ps [18,19]. Monte Carlo (MC) simulated events are generated with a GEANT4-based [20] detector simulation software package, which includes the geometric description and a simulation of the response of the detector.…”

Determination of the Pseudoscalar Decay Constant fDs+ via Ds+Ablikim1, Ачасов2, Ahmed3 et al. 2019Phys. Rev. Lett.Self Cite

“…[47]. The end cap time-of-flight (TOF) system was upgraded with multigap resistive plate chamber technology and now has a time resolution of 60 ps [48,49]. Monte Carlo (MC) events are generated with a GEANT4-based [50] detector simulation software package [51], which includes both the geometrical description of the detector and the detector's response.…”

Precise measurements of branching fractions for $$ {\mathrm{D}}_{\mathrm{s}}^{+} $$ meson decays to two pseudoscalar mesons

“…The time resolution of the TOF barrel part is 68 ps, while that of the end cap part is 110 ps. The end cap TOF system was upgraded in 2015 with multi-gap resistive plate chamber technology, providing a time resolution of 60 ps [17,18]. Only the 4.226 GeV data was taken before this upgrade.…”