Radiation background with the CMS RPCs at the LHC

TL;DR

This paper reports on radiation background measurements in the CMS RPCs at the LHC, analyzing data from 2011-2012 collisions and estimating future background rates through measurements and simulations.

Contribution

It provides detailed measurements of radiation backgrounds inside CMS RPCs and estimates future background levels using both data extrapolation and simulation.

Findings

Background rates measured during 2011-2012 collisions

Background distribution within RPCs characterized

Future background levels estimated for upcoming LHC runs

Abstract

The Resistive Plate Chambers (RPCs) are employed in the CMS experiment at the LHC as dedicated trigger system both in the barrel and in the endcap. This note presents results of the radiation background measurements performed with the 2011 and 2012 proton-proton collision data collected by CMS. Emphasis is given to the measurements of the background distribution inside the RPCs. The expected background rates during the future running of the LHC are estimated both from extrapolated measurements and from simulation.