Speaker
Description
The Super Tau-Charm Facility (STCF) is the next-generation high luminosity $e^+e^-$ collider in China with a center-of-mass energy ($\sqrt{s}$) from $2$ to ~$7$ $GeV$ and a peak luminosity of at least $0.5\times10^{35}$ $cm^{-2}s^{-1}$ optimized at $\sqrt{s}=4$ $GeV$. A high event rate and a high beam background count rate of over 1 MHz per module places new demands on the electromagnetic calorimeter (ECAL): maintaining good energy and position resolution under severe pileup conditions. Meanwhile, the capability of event timing and particle identification is also an important aspect of ECAL R&D, where a time resolution of several hundred picoseconds is expected.
The ECAL design is based on pure CsI (pCsI) crystals coupled with avalanche photodiodes (APD) readout. A complete chain of simulation and reconstruction is implemented under the Offline Software of Super Tau-Charm Facility (OSCAR). The architecture and module geometry of ECAL are designed by optimizing the physical performance. A 5 $\times$ 5 array prototype is developed by applying a novel "wavelength shifting in propagation" scheme, which features fast time response and good signal-to-noise ratio at a reasonable cost.
This talk summarizes the simulation and optimization of the calorimeter system, and also the development and experimental tests of the prototype. Some comprehensive test results, such as the radiation hardness, the uniformity of the light collection and the timing performance are also presented. Besides, a beam test is carried out at CERN recently, and an intial data analysis has proved a good performance of the prototype to meet the requirements of the conceptual design.
| Position | Doctoral student |
|---|---|
| Affiliation | University of Science and Technology of China |
| Country | China |
