Speaker
Description
The next generation of collider detectors will make full use of Particle Flow Algorithms, requiring high precision tracking and full imaging calorimeters. The latter, thanks to granularity improvements by two to three orders of magnitude compared to existing devices, have been developed during the past 15 years by the CALICE collaboration and are now reaching maturity. This contribution will focus on the commissioning of a 15-layer prototype of a highly granular silicon-tungsten electromagnetic calorimeter that comprise 15360 readout cells. Each layer has a dimension of 18x18 cm2 and is composed of 4 silicon sensors of 9x9 cm2 and thicknesses between 320 and 650um, The silicon sensors are readout out by the SKIROC2a ASICs designed for self-triggering and low power. The interface between ASICs and is provided by complex PCBs that ensure small parasitic capacitances in order to maintain a low noise level.
The prototype has been exposed in November 2021 and March 2022 to a beam test at DESY. The contribution will give a general overview on the prototype and will highlight technical developments necessary for its construction. It will introduce the individual components like the front end electronics, PCBs and the compact readout electronics and construction steps such as gluing of sensors or developed techniques for the encapsulation of bare ASICs. This contribution is the first of a series of contributions on the performance of the prototype and the outlook onto the future of the R&D.
Let us add that in March 2022 a common data taking with the analogue hadron calorimeter of CALICE has been been tested. We will report on the first experience obtained in this test.
