Calculation of acceptance of high intensity superconducting proton linac for Project X

TL;DR

This paper evaluates the acceptance of Fermilab's proposed high intensity superconducting proton linac for Project-X, focusing on both longitudinal and transverse acceptance, and analyzing the impact of component failures.

Contribution

It provides a detailed calculation of the linac's acceptance and identifies sensitive areas and failure impacts, which are novel for this specific high intensity CW superconducting linac.

Findings

Identified the most sensitive regions affecting acceptance.

Quantified the impact of beam line element failures.

Provided guidelines for matching sections to optimize acceptance.

Abstract

Project-X is the proposed high intensity proton facility to be built at Fermilab, US. Its Superconducting Linac, to be used at first stage of acceleration, will be operated in continuous wave (CW) mode. The Linac is divided into three sections on the basis of operating frequencies & six sections on the basis of family of RF cavities to be used for the acceleration of beam from 2.5 MeV to 3 GeV. The transition from one section to another can limit the acceptance of the Linac if these are not matched properly. We performed a study to calculate the acceptance of the Linac in both longitudinal and transverse plane. Investigation of most sensitive area which limits longitudinal acceptance and study of influence of failure of beam line elements at critical position, on acceptance are also performed.