Heidelberg 2015 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 60: Instrumentation 18

HK 60.2: Group Report

Thursday, March 26, 2015, 17:30–18:00, M/HS2

Status of the FRS Ion Catcher and future prospectives at FAIR — •Moritz Pascal Reiter for the FRS Ion Catcher collaboration — Justus-Liebig-University Giessen

At the LEB of the Super-FRS at FAIR, projectile and fission fragments will be produced at relativistic energies, separated in-flight, range-bunched, slowed-down and than thermalized in a cryogenic stopping cell (CSC) filled with ultra pure helium gas to kinetic energies of a few eV. After thermalization the ions are delivered to the high precision experiments MATS and LaSpec. A prototype CSC for the LEB has been successfully commissioned at the FRS Ion Catcher, consisting of the FRS, CSC and a multiple-reflection time-of-flight mass-spectrometer (MR-ToF-MS). During these experiments high total efficiencies (15 %), average extraction times of 24 ms, mass resolving powers beyond 400.000 have been measured for several projectile and fission fragments.

To make full use of the beams delivered by the Super-FRS the areal density of the CSC has to be increased even further. The future CSC follows a new approach and will have an order of magnitude higher areal density, while at the same time allowing extraction times down to 5 ms. The future design will be presented and discussed in detail.