August 27, 2017 to September 1, 2017
RAI Congress Center, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Recommissioning and upgrades to the FNAL muon g-2 magnets

Aug 29, 2017, 3:00 PM


Regular 15 minutes Oral Presentation A1 - Superconducting Accelerator Magnets Tue-Af-Or16


Karie Badgley (Fermilab)


The recently recommissioned Fermilab muon g-2 experiment is aiming to determine the anomalous magnetic moment of the muon to 140 ppb. To achieve this level of precision, the magnetic field seen by the muon must be know at fraction of a ppm level, which puts limits on the required magnetic field uniformity. This paper provides an overview of the g-2 magnet systems; the inflector magnet, the main ring magnet, and the 200 active compensation coils. After mechanical adjustments and shimming were performed on the magnet pole tips, the remaining integrated field errors were measured using NMR probes. These remaining higher order multipoles are reduced using the compensation coils. Three charcoal panels were also removed from the cryogenic vacuum system to prevent magnet quench due to pressure spikes. Installation and testing of the inflector magnet, as well as work toward a new inflector, will also be discussed.

Submitters Country United States

Primary author

Karie Badgley (Fermilab)

Presentation materials