Upper Limits for Sublimation Losses from Hot Carbon Targets in Vacuum and in Gasses
نویسنده
چکیده
First rather straight forward estimates for sublimation in a vacuum are discussed, and then diffusion in a stationary He atmosphere is calculated. But a He atmosphere with large temperature gradients will not be stationary in the presence of gravity, as was correctly pointed out by several colleagues [2]. Crude but safe convection estimates are then presented. Finally the idea of possible chemical carbon re-deposition in atmospheres containing some hydrogen is briefly explored.
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تاریخ انتشار 2000