Ion detector for Accelerator Mass Spectrometry based on low-pressure TPC with THGEM readout

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Abstract

A new technique for ion identification in Accelerator Mass Spectrometry (AMS) has been proposed by measuring the ion track ranges using a low-pressure TPC. As a proof of principle, a low-pressure TPC with charge readout using a THGEM multiplier was developed. The tracks of alpha particles from various radioactive sources were successfully recorded in the TPC. The track ranges were measured with a high accuracy, reaching the 2% resolution level. Using these results and the SRIM code simulation, it is shown that the isobaric boron and beryllium ions can be effectively separated at ten sigma level. It is expected that this technique will be applied in the AMS facility in Novosibirsk for dating geological objects, in particular for the geochronology of Cenozoic Era.

Original languageEnglish
Article numberC07025
Number of pages10
JournalJournal of Instrumentation
Volume15
Issue number7
DOIs
Publication statusPublished - Jul 2020

Keywords

  • Accelerator mass spectroscopy (AMS)
  • etc)
  • GEM
  • InGrid
  • MHSP
  • MICROMEGAS
  • Micropattern gaseous detectors (MSGC
  • MICROPIC
  • Particle identification methods
  • RETHGEM
  • THGEM
  • Time projection Chambers (TPC)
  • Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM, MHSP, MICROPIC, MICROMEGAS, InGrid, etc)

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