Abstract
The stability of high-speed liquid lithium film flows on the wall was analytically studied for the neutron source in Boron Neutron Capture Therapy (BNCT), which makes cancers and tumors curable with cell-level selections and hence high QOL. The object of our research is to materialize the thin and high-speed wall film flows of liquid lithium in a high vacuum as an accelerator target. The linear analysis approach is made to the stability on high-speed thin film flows of liquid lithium in a high vacuum, contrasting with the analysis of high-speed lithium sheet jets in our previous paper. We proved analytically that the wave of surface tension on high-speed thin lithium film flows in a high-vacuum has the same dispersive relation as the wave of surface tension of the fast and non-dispersive asymmetric wave on high-speed lithium thin sheet jets in a high-vacuum in our above previous paper. We also proved analytically that the high-speed lithium thin film flows are neutral stable under a long-wave approximation, and that the high-speed lithium thin film flows in a high-vacuum are of supercritical flows as the same as the above lithium thin sheet jets in a high-vacuum.
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