MICE Commissioning Issues Michael S. Zisman Center for Beam Physics Accelerator & Fusion Research Division Lawrence Berkeley National Laboratory MICO Meeting—RAL August 11, 2008

MICO: Zisman2 Hardware Installation Critical items —TOF0 moved to DSA o needs recabling (and testing) –getting under way now —TOF1 installed in Hall o important to have both TOF0 and TOF1 operating to characterize beam —remotely operable beam stop (“MBS”) o we have a fallback, but it would be nice to get this done during the shutdown —indicator light in ISIS vault for Decay Solenoid o absence will not preclude testing, but presence would facilitate testing —need conduit for H 2 system venting o must be done before ISIS starts up –digging getting under way today —need DSA roof and fencing o preparatory work under way off-site

August 11, 2008MICO: Zisman3 Commissioning Needs (1) Need to get Decay Solenoid power supply operating —and then begin tests of magnet o use signs and barricades if no indicator light —need DL help for this —potential to interfere with DSA roof job if we’re not careful o could do off-hours after PSU is fully operable Need to develop optics for electron beam (Tilley, Apollonio) —used for calibrating CKOV and TOFs o must extend all the way past Q9 (i.e., into the Hall) Need to extend permission to operate target parasitically during ISIS user run

August 11, 2008MICO: Zisman4 Commissioning Needs (2) Need to make beam loss measurements to compare with model calculations (Adams, Dobbs) —also need extended run at “enhanced” loss rates to determine activation effects of a given instantaneous loss rate Need to test MBS once installed —logic of interlock to ISIS needs definition o maybe already done (?) Need to incorporate key ISIS BLMs and BPMs into MICE target data stream —and eventually into DAQ stream —cables are available, but need to be connected on both ends

August 11, 2008MICO: Zisman5 Issues Need suitable lock-off on DS PSU (safety issue)...hope springs eternal o ideally, should look the same as the other big PSUs Need network access to e-log from RAL-VIS network —Gareth Smith (PPD) trying to get this sorted out —this is a real pain and MUST get fixed soon! Need to decide how to proceed with off-line target —best guess: magnetic and mechanical axes are misaligned o need to confirm this or find another explanation –it is clear that we still do not have sufficient understanding of target requirements Need to resolve need to lock Hall when target operating and MBS is closed