Speaker
Description
For the treatment of major diseases such as cancer, Positron Emission Tomography(PET) nuclear medicine imaging technology has irreplaceable advantages over traditional imaging technology.At present, 18F-2-deoxyglucose (18F-FDG) is a widely used positron electron drug in clinical practice in China. Therefore, the Chinese Academy of Atomic Energy has carried out the research and development of the "ultra-compact 9.5MeV cyclotron — 18F liquid target" for medical PET isotope production. By using a 60A proton beam obtained by a 9.5MeV cyclotron, a liquid target filled with oxygen-rich water is bombarded to produce 18F on the order of 1.5 Curie (Ci). The 30 titanium window is used as the vacuum membrane window, and the 25 Havar membrane window is used to seal the liquid target cavity. The purpose of this paper is to reduce the damage of the beam to the titanium window and the Havar membrane window, and the helium cooling chamber innovatively adopts a cyclic helium cooling design to reduce the temperature on the membrane window. Simulating the cyclic helium cooling process through finite source software, the flow rate of helium is introduced with a flow rate of 2.5m/s. So, the feasibility of the cooling design for reducing the temperature of the membrane window is analyzed and verified.
