Abstract
The ATLAS Diamond Beam Monitor is a novel charged-particle detector. It will be used in the ATLAS experiment to measure luminosity and beam background. The monitor's pCVD diamond sensors are instrumented with pixellated FE-I4 front-end chips. The CVD diamond sensor material was chosen to ensure long-term durability of the sensors in a radiation-hard environment. This document describes the principles of luminosity measurements. It then explains how the Diamond Beam Monitor will carry out this task.
Highlights
The ATLAS Diamond Beam Monitor is a novel charged-particle detector
This capability is a result of its projective geometry pointing towards the interaction region
Luminosity is one of the most important parameters of a particle collider. It is a measurement of the rate of particle collisions that are produced by two particle beams
Summary
The DBM was designed as an upgrade to the existing luminosity monitor called the Beam Conditions Monitor (BCM) [2, 3]. The BCM is a particle detector consisting of eight diamond pad detectors. It is able to perform precise time-of-flight (ToF) measurements. The DBM complements the BCM’s features by implementing tracking capability. The DBM is able to distinguish particle tracks originating in the collision region from the background hits. This capability is a result of its projective geometry pointing towards the interaction region. The choice of diamond as a radiation-hard sensor material ensures the stability and durability of the detector throughout its lifetime
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