Speaker
Description
A 3-GeV proton beam from a rapid cycling synchrotron (RCS) is provided to muon and neutron production targets at Materials and Life Science Experimental Facility by a 3-GeV RCS to Neutron facility Beam Transport (3NBT) line in J-PARC. In the 3NBT line, the 3-GeV proton beam is deflected in the vertical direction due to fringe field of a large aperture solenoid for capturing secondary particles from the muon production target located approximately 30 m upstream of the neutron production target. For correcting the orbit deflection and eventually the vertical beam position on the neutron production target, the beam position was measured as function of excitation currents for the coils of the solenoid. In this presentation, we report results of the measurement analysis and the orbit correction based on the empirical analysis.
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