08.06.2018

IGISOL

The IGISOL (Ion Guide Isotope Separation On-Line) mass separator is the heart of the research infrastructure of the Exotic Nuclei and Beams -group, producing a broad range of ion beams for the research pursued by the group. 

On-line operation means that the front end of the IGISOL mass separator is directly connected to an accelerator used to produce exotic isotopes via nuclear reactions. The current IGISOL separator is served by two accelerators: the heavy ion cyclotron K-130, and the high-intensity light ion (protons and deuterons) cyclotron MCC30. The method used to ionise reaction products for their acceleration and subsequent mass analysis is called the ion guide technique. This method, nowadays adapted in many of the major nuclear physics laboratories in the world, was originally developed in Jyväskylä in 1980's. Its main advantage is that it can provide high-quality ion beams of short-lived isotopes of basically any element.

The JYFLTRAP double Penning trap, used for high-precision atomic mass measurements and beam purification for decay spectroscopy, is an essential part of the IGISOL facility. It is one of the leading Penning traps in the world. Another major infrastructure is the collinear laser spectroscopy set-up, owned and operated by the Universities of Liverpool and Manchester. They both employ the RFQ Cooler and Buncher for providing ions as short ion bunches for the experiments.

Decay spectroscopy studies at IGISOL utilize, together with our international collaborators, several state-of-the-art detector setups, such as the DTAS and MONSTER detectors of NUSTAR at FAIR. In-house germanium detectors are optimally used together with the Nuclear spectroscopy group. Spectroscopy studies can be performed either at the spectroscopy line directly after the IGISOL dipole magnet, or with highly purified beams after the JYFLTRAP Penning trap.

The infrastructure at IGISOL is being actively developed. Recently, the PI-ICR mass measurement technique has been commissioned, and a novel phase-dependent cleaning method has been demonstrated. A multi-reflection time-of-flight mass spectrometer for fast beam purification and mass measurements is being tested. A new magneto-optical trap has been set up by the University College London (UCL) aiming at the first experimental demonstration of a Bose-Einstein condensate of caesium isomers.  The MORA (Matter’s Origin from the RadioActivity of trapped and polarized isotopes) project, led by researchers from GANIL and LPC Caen, will bring substantial new infrastructure to IGISOL.