First Electrooptical Detection of Charged Particles

TL;DR

This paper reports the first successful electro-optical detection of a charged particle beam using polarization changes in a birefringent crystal, demonstrating a new method with high potential for precise particle detection.

Contribution

The study introduces the first experimental observation of charged particles via electro-optical effects, showcasing a novel detection technique with high temporal resolution.

Findings

Detected a pulsed electron beam through polarization modulation

Achieved a rise time of 120 ps limited by electronics

Demonstrated potential for high-resolution particle detectors

Abstract

We have made the first observation of a charged particle beam by means of its electro-optical effect on the polarization of laser light in a birefringent crystal. The modulation of the laser light during the passage of a pulsed electron beam was observed using a fast photodiode and a digital oscilloscope. The fastest rise time measured in a single shot, 120 ps, was limited by the bandwidth of the oscilloscope and the associated electronics. This technology holds promise for detectors of greatly improved spatial and temporal resolution for single relativistic charged particles as well as particle beams.