Before anything: I am not an electrical engineer: I don't know very much coaxial cables (just the very basics). I need to do some orders of magnitude calculation of heat transport of typical coaxial cable designed for cryogenic systems, over a range of temperatures. I could use the heat transport properties given by the documentations but the problem is that they are usually given for a fixed couple of temperatures at the both ends of the wire. I need to have arbitrary ending temperatures for my purpose.
What I need is then to use the properties of the materials of inner and outter conductor, the property of the dielectric in between, properties of the jacket. In addition to that I need the diameter of those components. Then I will simply use Fourier Heat law to find what I need.
But I have some troubles to understand aspects of documentation.
For example consider the following:
What are the inner and outter diameter of the jacket ? I don't find it. Is it because the jacket is not provided with the rest ?
Consider also this one:
In "Jacket outer dimension", for type C, they give 0.7874 mm × 1.016 mm: what does that mean ? I would expect a diameter (the outer diameter of the jacket). Here they give me a surface as if it was a square.
For type SR the shield diameter and Jacket outer dimension are the same. What does that even mean ? The jacket must have a bigger diameter than the shield.
You see my point: it is probably very basic questions to understand how to read those documentations.