부산대학교 도서관

Based on a paper published in 2019 by the FCAL Collaboration, this talk is giving an update of the Collaboration's effort to design prototype of highly compact calorimeter to instrument the very forward region of a detector at future $e^+e^-$ colliders. A luminometer prototype, based on sub-millimeter thick detector planes, is tested with an electron-beam of energy 1-5 GeV. The effective Moliere radius of the prototype comprising eight detector planes was measured to be (8.1 +/- 0.1 (stat.) +/- 0.3 (syst.))mm, and the result is well reproduced by the Monte Carlo simulation.
Comment: Talk presented on behalf of the FCAL Collaboration, at the International Workshop on Future Linear Colliders (LCWS2019), Sendai, Japan, 28 October-1 November, 2019. C19-10-28