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    STUDIA PHYSICA - Issue no. 2 / 2005  
         
  Article:   NON HOMOGENEOUS CYCLOTRON TARGET IRRADIATION: GAUSSIAN CURRENT DENSITY DISTRIBUTION - CYLINDRICAL COLLIMATOR.

Authors:  P. VAN DEN WINKEL.
 
       
         
  Abstract:  When a Gaussian current density distribution without wobbling is applied and a 400 A accelerator current is possible, the maximum permissible current equals 247 A, i.e. 37,7 % of the available accelerator current is collected on the collimator. The cyclotron operator should adjust the accelerator parameters, such that conditions given by the deduced equations are satisfied. When a2 = 0,108 (value used in IBA calculations) the present IBA-Karadj target only tolerates a maximum current of 133,8 A (a value that is confirmed experimentally) when no wobbling is applied. The current density distribution in that case is also represented.  
         
     
         
         
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