Ion Trapping for CRES Events: A GOLIATH Upgrade to the He6CRES Experiment

Abstract: 

The He6CRES collaboration is developing the Cyclotron Radiation Emission Spectroscopy (CRES) technique to, for the first time, precisely measure the energy spectrum of betas over the range of a few MeV. The goal is to search for chirality-flipping interactions via the Fierz interference parameter, b_Fierz. The present apparatus works with neutral radioactive gases contained within a cylindrical volume, which also serves as an RF waveguide. Due to a lack of radial confinement, the gas is able to decay freely within the volume resulting in a region of energy dependent losses as the Larmor radius of the particles leads them to the wall. A proposed solution involves using the magnetic field to radially confine ions of interest and converting the decay volume into a Penning trap to axially confine them.This combination of the CRES technique with ion trapping would add the ability to use a powerful spectroscopic technique applicable to a wide variety of species at radioactive beam facilities.


The introduction of ions to the system requires new components for ionization and separation of the beam, as well as the Gas Operated Large Ion-bunch Atomic Trap for He6CRES (GOLIATH) to cool and bunch the beam for efficient transport and injection into the Penning trap. The upgrade would also require altering the current geometry and RF structure of the waveguides. I will cover an overview of experimental constraints and requirements of the ion trap upgrade, as well as discuss the status of GOLIATH and plans for its characterization.

Speaker : 

David McClain

Location: 

Online

Material: