Design and Construction of the BESIII Detector

TL;DR

This paper details the design, construction, and expected performance of the BESIII detector, a complex system built for studying tau-charm physics at the high-luminosity BEPCII collider, including its components and testing results.

Contribution

It introduces the comprehensive design and construction of the BESIII detector, highlighting its innovative components and expected capabilities for tau-charm physics research.

Findings

Performance based on Monte Carlo simulations

Results from cosmic ray tests

Initial beam test results

Abstract

This paper will discuss the design and construction of BESIII, which is designed to study physics in the tau-charm energy region utilizing the new high luminosity BEPCII double ring e+e- collider. The expected performance will be given based on Monte Carlo simulations and results of cosmic ray and beam tests. In BESIII, tracking and momentum measurements for charged particles are made by a cylindrical multilayer drift chamber in a 1 T superconducting solenoid. Charged particles are identified with a time-of-flight system based on plastic scintillators in conjunction with dE/dx (energy loss per unit pathlength) measurements in the drift chamber. Energies of electromagnetic showers are measured by a CsI(Tl) crystal calorimeter located inside the solenoid magnet. Muons are identified by arrays of resistive plate chambers in the steel magnetic flux return. The level 1 trigger system, Data Acquisition system and the event filter system based on networked computers will also be described.