DEVELOPMENT OF A BEAM PROFILE MONITOR USING AN OXYGEN GAS SHEET

A non-destructive beam profile monitor using an oxygen gas sheet is being developed for ion beams. To produce the gas sheet, a nozzle beam method is employed. Besides taking use of a large magnetic moment of an oxygen molecule, the sheet is shaped by a high gradient magnetic field. A profile of the 8 MeV proton beam from NIRS- Cyclotron is measured by using the sheet. This paper gives the design and the present status of the monitor.