What is the nature of a Roton?

Answer 1

G'day Goring,

Thanks for your question.

A roton is an excitation in superfluid Helium-4. Its dispersion relation shows a linear increase from the origin, but exhibits first a maximum and then a minimum in energy as the momentum increases. Excitations with momenta in the linear region are called phonons; those with momenta close to the minimum are called rotons. Excitations with momenta near the maximum are sometimes called maxons.

It also refers to the Roton SSTO space design. Roton was a concept developed in the late 1990s as a fully reusable Single Stage to Orbit (SSTO) manned spacecraft. Roton was intended to reduce costs of launching payloads into low earth orbit by a factor of ten. Gary Hudson championed the design and formed the startup Rotary Rocket, Inc (rotaryrocket.com), headquartered in a 45,000-square-foot facility at Mojave Airport. A full-scale test vehicle made three hover flights in 1999, but the company ran out of funds and closed its doors in early 2001.

I have enclosed some sources for your reference.

Regards

Regards

Answer 2

This is all I could Find. A roton is an excitation in superfluid Helium-4. Its dispersion relation shows a linear increase from the origin, but exhibits first a maximum and then a minimum in energy as the momentum increases. Excitations with momenta in the linear region are called phonons; those with momenta close to the minimum are called rotons. Excitations with momenta near the maximum are sometimes called maxons

Answer 3

Roton is a giant flying bat that terrorized Japan in the late 1950's....wait....that was Rodan. Never mind.