Arthur Frederic Kip (27 September 1910, Los Angeles – 2 December 1995, Berkeley, California) was an American experimental physicist, specializing in solid-state physics.
In World War II he started as an active member of the Anti-Submarine Warfare Operations Research Group in the Office of the Commander-in-Chief, U.S. Fleet.
After the war he went to MIT as an assistant professor and first worked on their microwave linear accelerator, and later on electron spin resonance.
[1] In the summer of 1951, he brought a considerable amount of equipment and used his expertise in electron spin resonance (ESR) to set up a laboratory with the help of Alan M. Portis and Thomas Griswold.
The results of the cyclotron resonance studies defined for the first time the dynamic properties of the positive carriers and holes, which are essential to transistor-type devices.