Abstract
In this work, a methodology for the design and validation of a radiation monitoring (RadMON) system for electronic systems in particle accelerators is presented. The methodology expands the common radiation hardness assurance (RHA) procedure implemented at CERN, including new steps dedicated to both system-level testing, focused on a wireless device, and sensors characterization and readout validation. A case study demonstrating the validity of this methodology is proposed with the qualification of a novel battery-powered wireless RadMON system. This system not only represents the validation vehicle of the methodology but also an innovation in terms of monitoring platform due to its flexibility and improved capabilities. The application of this methodology allowed its full qualification, providing useful data in terms of resistance to radiation, lifetime, and failure rate in operation, demonstrating the validity of the testing strategy proposed in the article.
Highlights
AT CERN, the LHC hosts many electronic systems based on Components Off The Shelf (COTS) that are exposed to a mixed radiation field
The energy spectra of particles at LHC can range from a few meV to the GeV range [1][2] and as a result, these components can be affected by all radiation effects at the same time: Displacement Damage (DD), Total Ionizing Dose (TID), and Single Event Effects (SEE) [3][4]
Since no SET causing reset was observed on the Regulators, the cause of this higher failure rate can be attributed to the Transmission Subsystem, which can stop work as the Controller Subsystem for Single Event Functional Interrupt (SEFI)
Summary
AT CERN, the LHC hosts many electronic systems based on Components Off The Shelf (COTS) that are exposed to a mixed radiation field. At CERN, systems are qualified by following the RHA procedure [14][15] which provides steps to follow and recommendations to ensure reliable qualification for CERN radiation environments It was shown in [16] that for optoelectronic devices the standard test with protons did not give reliable results due to Non‐Ionising Energy Loss (NIEL) scaling violations with neutrons, which constitute the majority of the particles in the LHC environment. Today at CERN, increasing requirements in terms of flexibility, coverability, radiation tolerance, and radiation sensor capabilities have motivated the development of a battery-powered, radiation-tolerant wireless radiation monitoring platform This new wireless monitoring system architecture implies several design choices and working modes that need to be assessed during the qualification process with dedicated test methodologies to ensure system reliability. This system is the vehicle for validating the methodology and an innovation in terms of monitoring platform due to its flexibility and enhanced capabilities
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