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The ISOL-SRS project








SUCCESS for ISS first experiment campaign with radioactive beams 30/10/2018

The first campaign of nuclear physics experiment using the ISOLDE Solenoid Spectrometer (ISS) with a radioactive ion beams was successfully conducted at CERN in September/October 2018. The first experiment was led by the University of Manchester and studied the nucleon transfer reaction d(28Mg,p)29Mg. The second experiment was led by collaborators at the US Argonne National Laboratory to study the d(206Hg,p)207Hg reaction. The radioactive ions of 28Mg and 207Hg were accelerated respectively to 10 MeV/nucleon and 7.5 MeV by the recently upgraded HIE-ISOLDE radioactive-beam facility and directed into a deuterium target positioned inside the 4-Tesla ISS super-conducting magnet.

For this early-implementation experiment, the magnet was coupled with the HELIOS detector, a resistive position-sensitive silicon detector array, on loan from collaborators at the US Argonne National Laboratory, used to measure the ejectile protons as they spiral back towards the axis of the solenoid due to the action of the magnetic field. The figure below shows the proton energy and position correlation lines measured online and corresponding to the population of the 29Mg ground state (top line) and its low-lying exited states (lower lines). The data will be used to extract the reaction rate and how the yield varies with the emission angle of the proton, allowing properties of the excited states to be determined and revealing how quantum effects in Mg isotopes evolve with the proton-neutron ratio.

Proton Energy-position colrrelation

ISS Science workshop in Manchester 14/07/2017

Slides are available on this documents page.

June 16/06/2016

Magnet connected to beam line (#2):





March 2, 2017 - External Spectrometer/ISS:

After being successfully cooled down and tested earlier this year, the MRI Magnet were transported from building B190 to the end of one of the three beam lines of Hie-ISOLDE.


April 19, 2016 - External Spectrometer:

The Brisbane MRI Magnet has now arrived at CERN and sits currently in building B190. Visual inspection after unwrapping the shrink wrap showed no signs of damage. Coil resistances are as measured in Brisbane and the dismounting of the patient bed, the shims and gradient coil has began.


March 7, 2016 - External Spectrometer:

The magnet removal and packaging went smoothly and was professionally handled. The videos and photos of the magnet removal from hospital and shipment to packaging company availble here:


January 07, 2016 - External Spectrometer:

The funding for the magnet of the External spectrometer has been awarded by STFC and the University of Liverpool. The magnet, currently in Brisbane, Austrialia, is a OR66 ex-MRI magnet that was previously used for medical imaging research at the University of Queensland's Centre for Advanced Imaging. It is a 4 Tesla ex-MRI magnet with active shielding to reduce stray field. The magnet was first commisioned in February 2003 and has been discharged and warmed up in ~2013. The order for this magnet has been placed and its delivery at CERN is expected in March 2016.

Brisbane Magnet