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User name Wolfgang
Log entry time 10:55:03 on January22,2009
Entry number 257287
keyword=BB HV trip
BB HV tripped (all chambers), The trip was caused by a badly mis-steered beam (BPMA Y: 3.8 mm, BPMB Y: 3.4 mm). The beam movement was caused by ARC magnet 4 problems (same as yesterday). MCC informed me that they have diagnostics tools attached to magnet 4. However, the problem may occur again.