Neutron focusing in time and magnification of the time lens

TL;DR

This paper investigates how neutron pulse duration and time magnification in a time lens depend on both geometric parameters and neutron velocities, revealing a more complex relationship than previously assumed.

Contribution

It introduces the dependence of time magnification on neutron velocities before and after the lens, extending the understanding beyond geometric factors.

Findings

Time magnification depends on neutron velocities.

The pulse duration and image are influenced by velocity changes.

The relationship is more complex than geometric considerations alone.

Abstract

The relation between the duration of the pulse of the neutron flux generated by the neutron source and the time image of this pulse formed by the time lens is considered. It is shown that the ratio of these magnitudes called "time magnification" depends not only on the geometric parameters of the device, as previously assumed, but also on the neutron velocity before and after the lens.