An 8 GEV Linac As The Booster Replacement In The Fermilab Power Upgrade

TL;DR

This paper proposes an 8 GeV superconducting RF linac as a replacement for the Fermilab Booster, significantly increasing beam power for the Main Injector and enabling advanced high-intensity experiments.

Contribution

It introduces a novel SRF linac design utilizing recent SRF technology improvements to replace the Booster and achieve higher beam power.

Findings

Design achieves >2.5 MW beam power for the Main Injector

Utilizes 650 MHz and 1300 MHz SRF cryomodules for acceleration

Enables next-generation high-intensity physics experiments

Abstract

Increasing the Fermilab Main Injector (MI) beam power above ~1.2 MW requires replacement of the 8 GeV Booster by a higher intensity alternative. Earlier, rapid-cycling synchrotron and linac solutions were considered for this purpose. In this paper, we consider the linac version that produces 8 GeV H- beam for injection into the Recycler Ring (RR) or MI The new linac takes ~1 GeV beam from the PIP-II linac and accelerates it to ~ 2 GeV in a 650 MHz SRF linac, and then accelerates to ~8 GeV in an SRF pulsed linac using 1300 MHz cryomodules. The linac components incorporate recent improvements in SRF technology. This Booster Replacement linac (BRL) will increase MI beam power to DUNE to more than 2.5 MW and enable next-generation intensity frontier experiments.