Abstract
The BESIII is a general-purpose experiment for studying electron-positron collisions at BEPCII which is located at IHEP, Beijing, China. It works in the τ-charm region mainly. Several world’s largest samples in this region had been collected. The BESIII DQM is a lightweight online data quality monitoring (DQM) solution at BESIII. It uses the full offline reconstruction software to reconstruct a part of data for real-time monitoring the data quality. The document gives an overview of the BESIII DQM system, including the framework, main components and data flow. The DQM system separates online DAQ and offline software environment as much as possible and is easy to expand.
Highlights
The BESIII detector is a magnetic spectrometer [1] located at the Beijing Electron Positron Collider (BEPCII) [2]
The cylindrical core of the BESIII detector consists of a helium-based multi-layer drift chamber (MDC), a plastic scintillator time-of-flight system (TOF), and a CsI(Tl) electromagnetic calorimeter (EMC), which are all enclosed in a superconducting solenoidal magnet providing a 1.0 T (0.9 T in 2012) magnetic field
The BESIII data quality monitoring (DQM) software framework was developed based on the framework of the ATLAS DQMF [10] and the BESIII offline software system (BOSS) [8]
Summary
The BESIII detector is a magnetic spectrometer [1] located at the Beijing Electron Positron Collider (BEPCII) [2]. The EMC measures photon energies with a resolution of 2.5% (5%) at 1 GeV in the barrel (end cap) region. 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 is upgraded in 2015 with multi-gap resistive plate chamber technology, providing a time resolution of 60 ps [3]. It has already collected a huge amount of data in the τ− charm region, including 1.3 billion J/ψ, 0.5 billion ψ(3686), ψ(3770) data corresponding to an integrated luminosity of 2.9 fb−1, data for XYZ particles study and R scan, and so on. High-quality experimental data is very important in order to achieve such goals
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