Abstract: The Compact Muon Solenoid (CMS) experiment prepares its Phase-2 upgrade for the high-luminosity era of the
LHC operation (HL-LHC). Due to the increase of occupancy, trigger latency and rates, the full electronics of the CMS Drift Tube (DT) chambers will need to be replaced. In the new design, the time bin for the digitization of the chamber signals will be of around 1 ns, and the totality of the signals will be forwarded asynchronously
to the service cavern at full resolution. The new backend system will be in charge of building the trigger
primitives of each chamber. These trigger primitives contain the information at chamber level about the muon
candidates position, direction, and collision time, and are used as input in the L1 CMS trigger. The added
functionalities will improve the robustness of the system against ageing. An algorithm based on analytical
solutions for reconstructing the DT trigger primitives, called Analytical Method, has been implemented both
as a software C++ emulator and in firmware. Its performance has been estimated using the software emulator
with simulated and real data samples, and through hardware implementation tests. Measured efficiencies are
96 to 98% for all qualities and time and spatial resolutions are close to the ultimate performance of the
DT chambers. A prototype chain of the HL-LHC electronics using the Analytical Method for trigger primitive
generation has been installed during Long Shutdown 2 of the LHC and operated in CMS cosmic data taking
campaigns in 2020 and 2021. Results from this validation step, the so-called Slice Test, are presented.
Fuente: Nuclear Instruments and Methods in Physics Research, Section A, 2023, 1049, 168103
Editorial: North-Holland ; Elsevier Science
Fecha de publicación: 01/04/2023
Nº de páginas: 8
Tipo de publicación: Artículo de Revista
DOI: 10.1016/j.nima.2023.168103
ISSN: 0168-9002,1872-9576