Vibrational measurement for commissioning SRF Accelerator Test Facility at Fermilab

TL;DR

This paper discusses the measurement and characterization of vibrational and ground motion effects during the commissioning of cryomodule components at Fermilab's SRF Accelerator Test Facility, supporting future high-energy accelerators.

Contribution

It presents new vibrational measurement techniques and baseline motion data for cryomodule commissioning at Fermilab's SRF facility.

Findings

Mechanical transfer functions between foundation and beamline components measured

Ground motion and noise characterized during initial operation

System displacement and vibrational effects documented

Abstract

The commissioning of two cryomodule components is underway at Fermilab's Superconducting Radio Frequency (SRF) Accelerator Test Facility. The research at this facility supports the next generation high intensity linear accelerators such as the International Linear Collider (ILC), a new high intensity injector (Project X) and other future machines. These components, Cryomodule #1 (CM1) and Capture Cavity II (CC2), which contain 1.3 GHz cavities are connected in series in the beamline and through cryogenic plumbing. Studies regarding characterization of ground motion, technical and cultural noise continue. Mechanical transfer functions between the foundation and critical beamline components have been measured and overall system displacement characterized. Baseline motion measurements given initial operation of cryogenic, vacuum systems and other utilities are considered.