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A forced-convection gas target for the production of [11C]CH4
T Uittenbosch1, K Buckley1, T Ruth1
1TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, Canada V6T2A3.
Abstract:
A forced-convection gas target for the production of [11C]CH4 on a 13 MeV cyclotron was constructed and tested. A small fan was incorporated into the back of the target, which mixes the target gas during irradiation. The effect of the forced convection alone on the target operation and the [11C]CH4 yield was measured. Forced convection improved the target yield by up to 16 ± 4%. In addition, improvement in heat transfer of up to 70% was observed to be a function of fan speed. Operating with forced convection allowed delivery of 21% higher beam currents while still staying in the acceptable pressure rise during irradiation, providing a 25 ± 7% greater yield.
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