Superconducting Solenoid System with Adjustable Shielding Factor for Precision Measurements of the Properties of the Antiproton

• DOI: 10.1103/physrevapplied.12.044012
• Publication Date: 2019-10-04T12:21:08Z
• Authors: Jack A. Devlin; Elise Wursten; James A. Harrington; Takashi Higuchi; Pascal E. Blessing; Matthias J. Borchert; Stefan Erlewein; Jannek J. Hansen; Jonathan Morgner; Matthew A. Bohman; Andreas H. Mooser; Christian Smorra; Markus Wiesinger; Klaus Blaum; Yasuyuki Matsuda; Christian Ospelkaus; Wolfgang Quint; Jochen Walz; Yasunori Yamazaki; Stefan Ulmer
• Keywords: Antiproton; Solenoid; Penning trap

In high-energy physics, Penning traps are used to make very precise mass measurements, determine fundamental constants, and test symmetries. Magnetic field noise limits trap performance, though. A superconducting self-shielding coil can reduce magnetic fluctuations, but technical difficulties high shielding factors difficult achieve in practice. This work describes a design for system with adjustable factor that overcomes many of these difficulties. the BASE experiment at CERN, authors use this fourfold improvement precision antiproton-to-proton charge-to-mass comparisons.