AMC radiation monitoring module for xTCA based low level RF control system

Modern Advanced/Micro Telecommunications Computing Architecture (ATCA/žTCA) standards gain popularity, not only in telecommunication industry, but also in High Energy Physics (HEP) area. These platforms are considered as the future platform for the Low Level RF (LLRF) control system of the X-ray Free Electron Laser (XFEL) project realized at Deutsches Elektronen-Synchrotron (DESY) facility. One of the most important features of an ATCA/žTCA based control system is its high reliability, which can be decreased by negative influence of neutron and gamma radiation produced during normal operation of linear accelerators. The XFEL laser will be built in a single tunnel to decrease costs of the project. Therefore, the LLRF system will be exposed to harmful radiation. It is recommended to monitor doses absorbed by electronic equipment. The gathered data could help to estimate lifetime of electronic devices and to schedule essential equipment replacement. The radiation detector should be integrated with the ATCA/žTCA system to allow measurements in close proximity to the electronisc, which helps to increase the accuracy of measurements. The paper describes a radiation monitoring module capable of monitoring gamma radiation and neutron fluence in real-time which fulfills the mentioned requirements and is designed in accordance with the AMC specification.