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I'm having trouble finding reliable data on the dielectric constant of helium(4) gas as a function of temperature, from 4K up.
Grateful for any help
Grateful for any help
The dielectric constant of helium is approximately 1.000036, making it one of the lowest among all known substances.
The dielectric constant of a substance determines its ability to store electrical energy and affects its interactions with electric fields. In the case of helium, its low dielectric constant makes it a poor electrical insulator and less susceptible to electric fields.
The dielectric constant of helium can be measured using various techniques, such as capacitance measurements, optical methods, and spectroscopic methods. These methods involve measuring the change in electric field or energy in the presence of helium.
Yes, the dielectric constant of helium can vary depending on factors such as temperature, pressure, and the presence of impurities. For example, at extremely low temperatures, the dielectric constant of helium can approach 1.000000, making it an almost perfect insulator.
The dielectric constant of helium is significantly lower than most other gases, such as nitrogen, oxygen, and carbon dioxide. This is due to its small atomic size and low polarizability, which affects its ability to interact with electric fields.