H-/D- project

 

Cyclotron conversion into H−, D− accelerator

Status

  • high intensive internal beam currents of p+, D+

 

Limitations

  • low extraction efficiency of the 4-section deflection electrostatic system (max. 35%, max. external currents ~ 5µA)

 

Goal

  • high intensive external p+, D+ beams (tens of µA)
  • possibility of external targets installation (fast neutron generation, liquid and gaseous targets for radioisotopes production)

 

Solution

  • conversion of the U-120M into negative machine H−, D−
  • employment of high effective beam extraction by means of the stripping method
  • project and realization of a new beam line

 


New internal PIG ion source with a cold cathode

Effective production both positive and negative ions,  material Mo
Optimisation: arc volume geometry, extraction slit dimensions, plasma gap width, gas flow, cathode heat transfer, cathode life time (~ 800hours), H− DC current 2.0 mA

 

 

 

Operation: ~ 200hours, gas: 3He2

 

Operation: ~ 800hours, gas: H2, D2

 

Upgrade of the cyclotron vacuum system


 

Parameters of the cyclotron vacuum system

H beam transmission for the different combination of diffusion pumps in operation

 

Stripping method of H/D extraction

 

 

New beam line

 

 

Position 2:

 

  • Targets for production of fast neutrons
  • Liquid target H218O, 18O(p,n)18F, PET studies
  • Gaseous target, production of 81Rb/81mKr generator
  • Gaseous target, production 123I
  • Solid state targets for production non-commercial radionuclides 124I, 86Y, 230U