# RAPTOR: a new collinear laser ionization spectroscopy and laser-radiofrequency double-resonance experiment at the IGISOL facility

## TL;DR

RAPTOR is a compact collinear laser ionization spectroscopy device at IGISOL, enabling high-precision nuclear spectroscopy and purification with low-energy ion beams, integrated with mass spectrometry and decay spectroscopy capabilities.

## Contribution

The paper introduces RAPTOR, a novel low-energy collinear laser spectroscopy setup coupled with a Penning trap, enhancing nuclear state purification and high-resolution spectroscopy at IGISOL.

## Key findings

- Successful design and simulation of RAPTOR's optical and ion-beam system
- Integration with JYFLTRAP enables nuclear state purification
- Preliminary commissioning results demonstrate device functionality

## Abstract

RAPTOR, Resonance ionization spectroscopy And Purification Traps for Optimized spectRoscopy, is a new collinear resonance ionization spectroscopy device constructed at the Ion Guide Isotope Separator On-Line (IGISOL) facility at the University of Jyv\"askyl\"a, Finland. By operating at beam energies of under 10 keV, the footprint of the experiment is reduced compared to more traditional collinear laser spectroscopy beamlines. In addition, RAPTOR is coupled to the JYFLTRAP Penning trap mass spectrometer, opening a window to laser-assisted nuclear-state selective purification, serving not only the mass measurement program, but also supporting post-trap decay spectroscopy experiments. Finally, the low-energy ion beams used for RAPTOR will enable high-precision laser-radiofrequency double-resonance experiments, resulting in spectroscopy with linewidths below 1 MHz. In this contribution, the technical layout of RAPTOR and a selection of ion-beam optical simulations for the device are presented, along with a discussion of the current status of the commissioning experiments.