Patent ID: 11923167
Assignee: SUMITOMO HEAVY INDUSTRIES ION TECHNOLOGY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. An ion implanter comprising:
a plurality of devices which are disposed along a beamline along which an ion beam is transported;
a plurality of neutron ray measuring instruments which are disposed at a plurality of positions in the vicinity of the beamline and measure a neutron ray from a neutron ray source which is generated in the beamline due to collision of a high-energy ion beam; and
a control device which monitors at least one of the plurality of devices, based on a plurality of measurement values measured by the plurality of neutron ray measuring instruments,
wherein the control device monitors the at least one of the plurality of devices, based on the plurality of measurement values and a ratio of the plurality of measurement values.