Simulation Study for the Separation of Rare Isotopes at the Seoul National University AMS Facility

Abstract

ABSTRACT.A simulation study for the separation of rare isotopes such as beryllium and aluminum was performed for a new beam line to be attached to the 3MV Tandetron accelerator at the accelerator mass spectrometry (AMS) facility of Seoul National University in Korea. The new beam line will also be used for other scientific applications, namely, ion implantations, Rutherford backscattering, and nuclear astrophysics experiments. It mainly consists of 30° and 100° deflection dipole magnets and drift spaces. A transfer matrix for the beam line was determined by the TRANSPORT code. Simulation of the rare isotope separation was performed by a ray tracing method using the TURTLE code. The simulation results, including the effect of the energy degrader, provide feasibility for the separation of isobars with small mass differences in 10 Be-10 B and 26 Mg.

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“…The new beam-line for 10 Be AMS was designed using the TRANSPORT code [1]. To simulate the trajectory of a charged particle through the new beam line, we performed a computation using a ray tracing method which included higher order aberrations.…”

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“…Simulation by a ray tracing method using the ''TURTLE'' code predicted the suitability of the 3 MV Seoul system for the separation of Al and Be isotopes from their respective isobars. 47 The design of a new high-intensity Cs-ion source and sample changer was based on current best practice for the two parts and followed modelling of various aspects of the ion optics. 48 Simulations were performed for the trajectories of Cs 1 ions emitted from the surface of the spherical ionizer and for the secondary ion trajectories.…”