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Abstract: High-granularity calorimeters based on particle-flow algorithms have been attractive options for future collider experiments. Among several concepts for the hadronic calorimeter studied within the CALICE collaboration, the Analog Hadron Calorimeter (AHCAL) is a sampling calorimeter of plastic scintillator tiles read out by silicon photomultipliers (SiPMs) as active components interleaved with tungsten or steel absorber plates. After the proof-of-principle demonstrated by the "physics prototype", the focus now lies on improving the implementation in the "technological prototype", which are scalable to the full detector. The detector design has been optimized to address the challenge from automated mass assembly of around 8 million channels in the final detector. The front-end electronics is fully integrated into the active layers and is designed for compactness as well as minimal power consumption (i.e. power pulsing). Several evolving prototypes were exposed to electron, muon and hadron beams. This seminar will cover topics including the optimized detector design, testbeam measurements with the AHCAL technological prototype and the ongoing development of a large prototype for hadronic showers.
About Speaker:
The speaker, Dr. Yong Liu, graduated from Wuhan University in 2006 and obtained his Ph.D. in 2011 at Institute of High Energy Physics (IHEP, CAS) in Beijing. Afterwards he first joined Justus Liebig University Giessen with a major focus on the development of a fast timing detector for an ATLAS upgrade project. Since 2012 he has been working at Johannes Gutenberg University Mainz on the development of a high-precision calorimeter (AHCAL) for future linear colliders within the CALICE Collaboration. He has made major contributions including the tile-on-SiPM design, comprehensive characterizations of SiPMs and a full electronics system integrated with ASICs, as well as the development of key setups crucial to the large AHCAL technological prototype.