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Essentially the heat pipe is divided into sections, after having first undergone thermal testing. Each section is weighed, and then cleaned of all deposits and weighed again. The difference between weights is a measure of the amount of working fluid deposited at that section. The compilationof this data produces a map of the working fluid distribution in the frozen region. This method offers the benefit of being able to measure mass distribution rather than just net mass in the frozen region. Unfortunately, this is a destructive method; so only one mass distribution measurement can be made per heat pipe.
This would require a The development of this technique was considered beyond the scope of this program and was not pursued. Measurement of Segment Weights Technioue This, the third alternative is straightforward in principle and in implementation. Essentially the heat pipe is divided into sections, after having first undergone thermal testing. Each section is weighed, and then cleaned of all deposits and weighed again. The difference between weights is a measure of the amount of working fluid deposited at that section.
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