Synchronization and Characterization of an Ultra-Short Laser for Photoemission and Electron-Beam Diagnostics Studies at a Radio Frequency Photoinjector

TL;DR

This paper details the installation, synchronization, and characterization of a titanium-sapphire laser system at Fermilab's photoinjector, enabling precise photoemission and electron beam diagnostics with stability and optimized temporal profile.

Contribution

It presents a comprehensive synchronization scheme and performance analysis of a commercially-available laser system for advanced electron beam studies.

Findings

Synchronization accuracy within 1 ps and 1.5% intensity stability.

Active suppression of long-term drifts.

Optimized laser temporal profile using frequency-resolved optical gating.

Abstract

A commercially-available titanium-sapphire laser system has recently been installed at the Fermilab A0 photoinjector laboratory in support of photoemission and electron beam diagnostics studies. The laser system is synchronized to both the 1.3-GHz master oscillator and a 1-Hz signal use to trigger the radiofrequency system and instrumentation acquisition. The synchronization scheme and performance are detailed. Long-term temporal and intensity drifts are identified and actively suppressed to within 1 ps and 1.5%, respectively. Measurement and optimization of the laser's temporal profile are accomplished using frequency-resolved optical gating.