Speaker
Description
Future electron-positron colliders such as the CEPC require electromagnetic calorimetry with excellent energy resolution and fine spatial segmentation for precision physics measurements and particle-flow reconstruction. A high-granularity long-bar crystal electromagnetic calorimeter, HGCCAL, has been proposed to meet these requirements.
This talk presents the design concept, simulation studies, prototype development, and beam-test performance of HGCCAL. The detector employs BGO/BSO crystal bars with SiPM readout, aiming at an energy resolution better than $3\%/\sqrt{E(\mathrm{GeV})} \oplus 1\%$. Geant4 simulations demonstrate good energy linearity and excellent intrinsic electromagnetic resolution. A compact prototype was constructed and tested at CERN beamlines, achieving an energy resolution of $1.95\%/\sqrt{E(\mathrm{GeV})} \oplus 0.59%$ in the 0.3-6 GeV range. These results validate the feasibility of HGCCAL and provide key input for future CEPC calorimeter optimization.
| 请选择分会 | 粒子物理实验技术 |
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