ISOLDE

ISOLDE
Name	ISOLDE
Location	CERN, Geneva
Established	1967
Type	Radioactive ion beam facility

ISOLDE is a major radioactive ion beam facility at CERN near Geneva, specializing in the production and study of short-lived isotopes for nuclear, atomic, molecular, condensed-matter, and astrophysics research. The facility operates within the framework of international collaborations spanning national laboratories, universities, and funding agencies such as European Commission, STFC, INFN, CNRS, and NSERC. Its work influences fields represented by institutions like Max Planck Society, Lawrence Berkeley National Laboratory, Brookhaven National Laboratory, TRIUMF, and RIKEN.

Overview

ISOLDE uses proton beams from the Proton Synchrotron Booster to induce spallation, fission, and fragmentation in target materials such as uranium and tantalum, producing exotic isotopes subsequently ionized and separated by mass separators. The facility supplies beams to experimental stations that include setups named after techniques and instruments similar to those at ISAC, GANIL, GSI Helmholtz Centre for Heavy Ion Research, and FRIB. Its user community comprises scientists affiliated with universities like University of Oxford, University of Manchester, University of Cambridge, KU Leuven, and Uppsala University and national labs such as Argonne National Laboratory and Oak Ridge National Laboratory.

History

ISOLDE originated from early on-line isotope separation efforts at CERN in the late 1960s, following accelerator developments linked to projects like the Synchro-Cyclotron and the PS complex. Upgrades occurred alongside milestones at LEP, SPS, and the LHC era, with major modernization campaigns analogous to initiatives at ISAC and SPIRAL2. Key historical moments involved collaborations with groups from University of Aarhus, Paul Scherrer Institute, Uppsala University, and University of Warsaw, and interactions with large-scale projects like ITER in terms of technology transfer. The facility adapted through phases comparable to the transitions at TRIUMF and GANIL, expanding capacities for precision measurements and decay spectroscopy.

Facilities and Experimental Setups

ISOLDE houses target stations, ion sources, high-resolution mass separators, and beamlines delivering to experimental halls containing apparatus analogous to MINIBALL, COLTRIMS, MISTRAL, and CERN Neutron Time-of-Flight (n_TOF). Notable installations include traps and spectroscopy stations comparable to systems at ISAC-II, JYFL, and ANL, and sample environments cooperating with facilities such as European Synchrotron Radiation Facility and Institut Laue-Langevin. Equipment supports techniques similar to those used in gamma-ray spectroscopy experiments at GSI and RIKEN, laser spectroscopy comparable to setups at Jyvaskyla, and nuclear moment measurements akin to studies at TRIUMF and PSI.

Research Programs and Methods

Research at the facility spans nuclear structure, nuclear astrophysics, fundamental interactions, and applications in materials science and life sciences. Programs employ methods such as decay spectroscopy, mass spectrometry, collinear laser spectroscopy, and ion-trap techniques comparable to those at ISAC, FRIB, and GANIL. Projects address topics connected to nucleosynthesis processes studied by groups at Max Planck Institute for Astrophysics and University of Notre Dame and to tests of fundamental symmetries parallel to efforts at Institut de Physique Nucléaire d'Orsay and TRIUMF. ISOLDE's methodology integrates technologies from collaborations with CERN IT services, EN-STI engineering divisions, and detector developments used at experiments like ATLAS, ALICE, and LHCb.

Key Discoveries and Contributions

The facility enabled precision measurements of nuclear properties—masses, radii, spins, and moments—contributing to models developed by theorists at Oak Ridge National Laboratory, Lawrence Livermore National Laboratory, Argonne National Laboratory, and universities including University of Warsaw and University of Jyväskylä. Results influenced astrophysical reaction-rate evaluations used by groups at NASA Goddard Space Flight Center and Harvard-Smithsonian Center for Astrophysics, and they fed into shell-model improvements pursued at Michigan State University and University of Tennessee. ISOLDE hosted experiments that constrained weak-interaction parameters relevant to collaborations with Brookhaven National Laboratory and Los Alamos National Laboratory and provided isotopes for applications mirrored in medical isotope programs at Paul Scherrer Institute and Karolinska Institute.

Collaborations and Outreach

The user community forms an international network involving universities and laboratories such as University of Liverpool, University of Groningen, University of Warsaw, Czech Technical University in Prague, University of Barcelona, University of Oslo, Ghent University, TUM, and ETH Zurich. ISOLDE collaborates with European research infrastructures including ESFRI projects and shares expertise with industrial partners and hospitals comparable to collaborations between CERN and Geneva University Hospitals. Outreach activities align with initiatives by European Physical Society, Royal Society, EPS Nuclear Physics Division, and public engagement programs like those run in concert with Science Museum Group and national science festivals.

Category:Particle physics facilities Category:Nuclear physics