Experiences with constructing and operating the world's largest silicon-based electromagnetic calorimeter - the CMS Preshower

6 Dec 2011, 17:20
20m
Activity Center (Academia Sinica)

Activity Center

Academia Sinica

128 Academia Road, Section 2, Nankang, Taipei 115, Taiwan
ORAL New materials Electronics

Speaker

Chia-Ming Kuo (National Central University (TW))

Description

The Preshower detector, part of the CMS Endcap Electromagnetic Calorimeter, is designed to have good spatial resolution to distinguish between different types of incoming particles. The Preshower is a sampling detector with two layers of lead absorber, each followed by 1.9mm pitch silicon strip sensors. Each of the 4288 DC-coupled sensors has an active area of 61x61mm^2, making a total surface of around 16m^2. The Preshower was installed and commissioned in CMS in 2009 and has been used in data taking ever since. The design, construction, commissioning and operational experience will be described, including the observation and mitigation of radiation-induced bulk and surface effects. The calibration strategy will also be discussed.

Author

Chia-Ming Kuo (National Central University (TW))

Presentation materials