Uittenbosch T, Buckley K, Ruth T, Martinez D M, Hoehr C
TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, Canada V6T2A3.
Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC, Canada V6T1Z3.
Appl Radiat Isot. 2018 Oct;140:1-4. doi: 10.1016/j.apradiso.2018.06.001. Epub 2018 Jun 15.
A forced-convection gas target for the production of [C]CH 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 [C]CH 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.
构建并测试了一种用于在13兆电子伏回旋加速器上生产[C]CH的强制对流气体靶。一个小型风扇安装在靶的后部，在辐照期间混合靶气体。测量了仅强制对流对靶操作和[C]CH产率的影响。强制对流使靶产率提高了高达16±4%。此外，观察到高达70%的传热改善是风扇速度的函数。在强制对流下运行允许输送高21%的束流，同时在辐照期间仍保持在可接受的压力升范围内，产率提高了25±7%。
