A High Voltage Engineering Corporation Model FN purchased in 1966 with NSF funds; operation funded primarily by the U.S. Department of Energy. See W.G. Weitkamp and F.H. Schmidt, "The University of Washington Three Stage Van de Graaff Accelerator," Nucl. Instrum. Meth. 122, 65 (1974).

   Ion       Max. Current    Max. Energy         Ion Source         
            (particle µA)       (MeV)                                  

 H1 or H2         50             18               DEIS or 860          
He3 or He4         2             27      Double Charge-Exchange Source
He3 or He4        30             7.5        Tandem Terminal Source     
Li6 or Li7         1             36                   860              
   B11             5             54                   860              
C12 or C13        10             63                   860              
  * N14            1             63               DEIS or 860          
O16 or O18        10             72               DEIS or 860          
    F             10             72               DEIS or 860          
  * Ca           0.5             99                   860              
    Ni           0.2             99                   860              
    I            0.01            108                  860              

^* Negative ion is the hydride, dihydride, or trihydride.

Additional ion species available include the following: Mg, Al, Si, P, S, Cl, Fe, Cu, Ge, Se, Br and Ag. Less common isotopes are generated from enriched material.

We give in the following table maximum beam energies and expected intensities for several representative ions. "Status of and Operating Experience with the University of Washington Superconducting Booster Linac," D.W. Storm et al., Nucl. Instrum. Meth. A 287, 247 (1990).

         Ion               Max. Current          Max. Practical     
                               (pµA)                Energy MeV       

          p                     >1                     35           
          d                     >1                     37           
         He                    0.5                     65           
         Li                    0.3                     94           
          C                    0.6                    170           
          N                    0.03                   198           
          O                    0.1                    220           
         Si                    0.1                    300           
        35Cl                   0.02                   358           
        40Ca                  0.001                   310           
         Ni                   0.001                   395