Double-crystal measurements at the CERN SPS

TL;DR

This paper demonstrates the use of double-crystal setups at CERN SPS to measure particle beam properties, validating the approach through experimental data aligned with simulations, with potential applications in measuring baryon moments.

Contribution

It presents the first proof of principle for the double-crystal method to measure properties of short-lived baryons in high-energy colliders.

Findings

Beam trajectories and profiles matched Monte-Carlo simulations.

Channeling efficiency was successfully measured and optimized.

Experimental setup effectively observed particle interactions with crystals.

Abstract

The UA9 setup, installed in the Super Proton Synchrotron (SPS) at CERN, was exploited for a proof of principle of the double-crystal scenario, proposed to measure the electric and the magnetic moments of short-lived baryons in a high-energy hadron collider, such as the Large Hadron Collider (LHC). Linear and angular actuators were used to position the crystals and establish the required beam configuration. Timepix detectors and high-sensitivity Beam Loss Monitors were exploited to observe the deflected beams. Linear and angular scans allowed exploring the particle interactions with the two crystals and recording their efficiency. The measured values of the beam trajectories, profiles and of the channeling efficiency agree with the results of a Monte-Carlo simulation.