On-Line Radiation Test Facility for Industrial Equipment needed for the Large Hadron Collider at CERN

The future Large Hadron Collider to be built at CERN will use superconducting magnets cooled down to 1.2 K. To preserve the superconductivity, the energy deposition dose levels in equipment located outside the cryostat, in the LHC tunnel, are calculated to be of the order of 1 to 10 Gy per year. At such dose levels, no major radiation-damage problems are to be expected, and the possibility of installing Commercial Of The Shelf (COTS) electronic equipment in the LHC tunnel along the accelerator is considered. To this purpose, industrial electronic equipment and circuits have to be qualified and tested against radiation to insure their long term stability and reliability. An on-line radiation test facility has been setup at the CERN Super Proton Synchrotron (SPS) and a program of on-line tests for electronic equipment is ongoing. Equipment tested includes Industrial Programmable Logic Controllers (PLCs) from several manufacturers, standard VME modules, Fieldbuses like Profibus, WorldFIP and CAN, various electronic cards, power converter equipment and cryogenic components. The irradiation is taking place in one of the target areas of the CERN SPS. The radiation is typical of a proton accelerator, it includes mainly gammas and neutrons, plus some some high-energy particles

Synchrotron Radiation Effects at LEP

With the increase of the LEP beam energy, synchrotron radiation effects become ever more important. Around the experiments, masks have been successfully used to absorb the higher rates, and photon bac kgrounds have not been a problem. Elsewhere around the ring, however, the increased radiated power has adversely affected various accelerator components; sections of the vacuum chamber, electronics, c ables and beam instrumentation equipment have all suffered. Furthermore, the use of wiggler magnets to control the bunch size has given rise to local problems on nearby separator equipment. These effe cts will be presented, together with the steps taken to avoid further difficulties at the higher energies and higher beam currents foreseen in future

ACCESS and SAFETY Procedures for ALICE

This document presents a summary of instructions to new arrivals to the ALICE project as well as to those collaborators who change activities and will come more often to Point-2. The document is entirely composed of already existing rules. It may serve as a book of reference and a safety refresher. It will be revised when the access conditions change, in particular before the start-up of the machine. References for detailed reading are also provided. Most important are the contact lists and it is encouraged to use them as early as possible