Sample charge state fraction calculation for ¹³²Sn

1. The double-stripped yield of ¹³²Sn in the 2004 RIB yield table is:

   2 x 10⁵ ions/sec

2. The double-stripped charge state fraction at 570 MeV for ¹³²Sn is:

   4.01% at 24.08 MV terminal voltage (foil-foil stripping)

3. The double-stripped charge state fraction at 620 MeV for ¹³²Sn is:

   1.91% at 24.15 MV terminal voltage (foil-foil stripping)

4. The expected yield on target for 620 MeV ¹³²Sn is:

   (1.91/4.01) x (2 x 10⁵ ions/sec) = 9.5 x 10⁴ ions/sec

Notes

1. Routine terminal voltages are 2-24.5 MV. Higher voltages are possible though the calculation is limited to 25 MV.
2. Transmission suffers at low terminal voltages (< 5 MV).
3. When estimating yields not based on measured intensities, expect a 70% transmission in addition to the charge state fraction.
4. For light ions, a post accelerator stripper foil may be used to select fully stripped ions; these calculations do not address such cases.