Speaker
Description
The construction of the DESIR facility at GANIL-SPIRAL2 is almost completed and soon the installation of the experimental setups will start. The experimental hall will feature state-of-the-art setups for decay and laser spectroscopy, as well as trap-based experiments. With the beams produced at SPIRAL1 and S3, DESIR will provide unique opportunities for high-precision low-energy nuclear physics. However, to make the most of those production capacities, high beam purification capacities are crucial.
In this context, the LP2iB has devised several complex devices that will be the backbone of the facility. In this presentation, I will focus on the progress on PIPERADE (PIèges de PEnning pour les RAdionucléides à DESIR). This double Penning trap spectrometer has been designed for high-resolution mass purification of strongly contaminated ion beams and high-precision mass measurements.
With its high-capacity purification trap, PIPERADE aims to separate up to 105 ions per bunch. Moreover, using state-of-the-art phase cleaning techniques, resolving powers up to 107 are expected, enabling the separation of low-lying isomeric states from their ground states. This allows to re-inject isomerically-pure beam in the main DESIR beam line to perform trap-assisted spectroscopy with the downstream setups.
In addition to its purification capabilities, PIPERADE is designed for high-precision mass measurements using the ToF-ICR (Time-of-Flight Ion-Cylotron-Resonance) and PI-ICR (Phase-Imaging Ion-Cyclotron-Resonance) techniques. A relative precision δm/m of 10-9 has already been reached for the first ToF-ICR measurements. Furthermore, the first PI-ICR mass measurements with PIPERADE have been performed in the past year, a crucial step towards the aimed precision and sensitivity.
In this oral contribution, I will present these recent upgrades and show the results obtained with PIPERADE, as well as outline the perspectives on its installation at DESIR and the future experimental program.
