Warm Compressor system Overview and status of the PIP-II cryogenic system

TL;DR

This paper provides an overview and current status update of the cryogenic system used in Fermilab's PIP-II accelerator upgrade, detailing its design, components, and operational status.

Contribution

It offers a comprehensive description of the PIP-II cryogenic system's layout, design, and operational status, which was not previously documented in detail.

Findings

Cryogenic system includes a helium cryogenic plant and distribution system.

The cryogenic plant supplies 2.5 kW at 2.0 K for 23 SRF cryomodules.

Current status indicates operational readiness and system integration.

Abstract

The Proton Improvement Plan-II (PIP-II) is a major upgrade to the Fermilab accelerator complex, featuring a new 800-MeV Superconducting Radio-Frequency (SRF) linear accelerator (Linac) powering the accelerator complex to provide the world's most intense high-energy neutrino beam. The PIP-II Linac consists of 23 SRF cryomodules operating at 2 K, 5 K, and 40 K temperature levels supplied by a single helium cryoplant providing 2.5 kW of cooling capacity at 2.0 K. The PIP-II cryogenic system consists of two major systems: a helium cryogenic plant and a cryogenic distribution system. The cryogenic plant includes a refrigerator cold box, a warm compressor system, and helium storage, recovery, and purification systems. The cryogenic distribution system includes a distribution box, intermediate transfer line, and a tunnel transfer line consisting of modular bayonet cans which supply and return cryogens to the cryomodules. A turnaround can is located at the end of the Linac to turnaround cryogenic flows. This paper describes the layout, design, and current status of the PIP-II cryogenic system.