The erosion of a divertor target of beryllium in a fusion reactor is discussed. The eroded atoms from the divertor target due to various erosion mechanisms including physical sputtering and radiation enhanced sublimation etc. will be ionized near the target, and parts of them will deposit on the target. Analysis and calculation show that the erosion rate of the divertor target plate will be substantially reduced due to the deposition process, and the erosion rate will decrease with the increase of the deposition rate. Based on these results, the effect of deposition of impurity injected extern...
