Radiation monitoring system for X-FEL

Abstract

Radiation produced during the operation of linear accelerators poses a potential threat to electronic devices installed in the accelerator tunnel. Therefore, a distributed radiation monitoring system was installed at five various spots in the Free electron LASer in Hamburg (FLASH) tunnel. The presented system allows us to measure radiation produced during the operation of a linear accelerator driving FLASH in real time. The system is composed of two modules: radiation-sensitive sensors and a radiationtolerant readout system constructed with the application of commercial-offthe-shelf (COTS) components. The neutron dosimeter was constructed using an innovative application of a static random access memory (SRAM), whereas a well-known radiation-sensitive RadFET was used for gamma quantification.

Measurement of Single Event Upsets in the ALICE-TPC Front-End Electronics

“…Procedure. The measurement of SEUs, on which we report here, em-ploys currently unused memory cells of the ALTRO pedestal memories by monitoring bit flips, which is a widely adopted method in dedicated radiation monitoring systems (e. g. [9]). The pedestal memories consist of 1024 10-bit SRAM cells for every ALTRO channel.…”