1. 10 th of April 2003 ATLAS “MSS Specification” Magnet Safety Systems – Magnet Common Project E. Sbrissa, G. Olesen – CERN/EP 5 Tests 5.1 Pre-production tests  A series of tests have been carried out to verify the viability of the MSS concept and to protect the first parts of the ATLAS magnets.  These tests are continuing, but a run-down of the most important results is given in the following sections. 5.1.1 ATLAS tests  The first tests were performed in Japan on the Central Solenoid magnet. A complete MSS system of early prototypes was mounted and tested at CERN, and then shipped to KEK and put in operation by the team of Dr. Yamamoto. The system was successfully used for protecting the solenoid during the verification phase of the magnet.  Extensive tests were then performed on the B0 magnet in the ATLAS test area. Various MSS analogue modules were used as protection of the magnet. All tests were positive, even though some noise problems were present in the set-up. Some improvements of the modules were carried out following this. The report on the B0 tests can be seen in appendix 5.1.1.

2. 10 th of April 2003 ATLAS “MSS Specification” Magnet Safety Systems – Common Project E. Sbrissa, G. Olesen – CERN/EP 5.1.2 Preliminary results: Four Magnet Safety Systems delivered:  Central Solenoid for ATLAS – KEK November 2000 - January 2001. Estimated number of hours of operation:~ 2100  B00 for ATLAS – CERN March - April 2001. Estimated number of hours of operation:~ 1500  B0 for ATLAS – CERN Excluding hard-wired logic June – December 2001. Estimated number of hours of operation:~ 5000  Chimney tests – CERN June 2002. Estimated number of hours of operation:~ 500

3. 10 th of April 2003 ATLAS “MSS Specification” Magnet Safety Systems – Common Project E. Sbrissa, G. Olesen – CERN/EP Total number of module hours: Analogue: ~ 84 500 hrs Digital: ~ 50 000 hrs  Number of failures:0  Number of false quenches:0  Number of unprovoked quenches detected:5/5 All detected by Supra-quench Detection modules.  Number of provoked quenches detected:All All types of quench detection tested.

4. 10 th of April 2003 ATLAS “MSS Specification” Magnet Safety Systems – Common Project E. Sbrissa, G. Olesen – CERN/EP 5.1.3 EMC tests  An EMC, “Electro-Magnetic Compatibility”, test of a complete MSS was passed in November 2002. The system was submitted to severe electrical and magnetic disturbances in order to verify its resistance to these.  The test set-up can be seen in appendix 5.1.3.1 and the resulting report in appendix 5.1.3.2.

5. 10 th of April 2003 ATLAS “MSS Specification” Magnet Safety Systems – Common Project E. Sbrissa, G. Olesen – CERN/EP

6. 10 th of April 2003 ATLAS “MSS Specification” Magnet Safety Systems – Common Project E. Sbrissa, G. Olesen – CERN/EP

7. 10 th of April 2003 ATLAS “MSS Specification” Magnet Safety Systems – Common Project E. Sbrissa, G. Olesen – CERN/EP

8. 10 th of April 2003 ATLAS “MSS Specification” Magnet Safety Systems – Common Project E. Sbrissa, G. Olesen – CERN/EP 5.2 Service The service foreseen for the “Magnet Safety System can be extracted from the relevant work package defined for ATLAS:  To perform for the maintenance and operation of the magnet systems, i.e. the Magnet Control System (MCS), the Magnet Safety System (MSS), the Electrical System and the Water Cooling System. One team of professional technicians for all the LHC experiment magnets covers ‘on call’ service and corrective maintenance, preventive maintenance, modifications and improvements during operation and testing of the magnet.  Tasks included in this work package: To cover preventive and corrective maintenance during running of the systems of the test facility (MCS, MSS, Electrical System, Water Cooling System).  To cover ‘on call’ service, preventive and corrective maintenance during operation and shut down. (MCS, MSS, Electrical System, Water Cooling System).  To operate a documentation system reporting the action performed, according to the Operation Manual and the Repair/Maintenance Manual.