The Ionization Profile Monitors in the Recycler Ring

TL;DR

This paper evaluates the ionization profile monitors in the Fermilab Recycler Ring, comparing their measurements with other diagnostics to improve understanding of beam size and loss mechanisms in synchrotrons.

Contribution

It provides a detailed analysis of IPM performance and calibration, enhancing confidence in beam size measurements in the Recycler and Main Injector.

Findings

IPMs' measurements align with multi-wire diagnostics after corrections

Beam size varies with different operational parameters

Improved understanding of IPM measurement accuracy

Abstract

The ionization profile monitors (IPMs) are used to measure the beam size in synchrotrons. Both the Fermilab Recycler and Main Injector (MI) machines have IPMs. However, they were not well understood enough to provide confidence in their measurements. Accurately measuring beam size through the IPMs was crucial to recognize the loss mechanisms for accelerators and to keep the beam loss to a minimum. Thus, performing measurements with different parameters using the IPMs led to a better analysis on how changes in conditions affect the beam size. The IPM measurements are compared with that of multi-wires in the upstream transfer line after applying corrections. The results were compared with other diagnostics and the change in the beam size for different parameters are presented in this paper.