Vacuum Beam Losses in the Axial Injection Systems of the Flnr Heavy Ion Cyclotrons
نویسنده
چکیده
The isochronous cyclotrons U-400M and U-400 [1] have been equipped with ECR ion sources provided with axial injection systems. They were located atop the cyclotron magnets [2,3]. This paper presents a model for calculating the pressure distribution and the beam losses due to the charge exchange with the residual gasses in the axial injection system. The result of the calculations made are compared with those of some pressure measurements. Also Investigated the manner in which the heavy ion beam transmission factor of the ion guide pipe depends on the following parameters: the diameters of its parts, the pumping speed, the gas loading from the ECR ion source, and the gas desorption rate.
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