Beam particle identification and tagging of incompletely stripped heavy beams with HEIST

A. K. Anthony*, C. Y. Niu, R. S. Wang, J. Wieske, K. W. Brown, Z. Chajecki, W. G. Lynch, Y. Ayyad*, J. Barney, T. Baumann, D. Bazin, S. Beceiro-Novo, J. Boza, J. Chen, K. J. Cook, M. Cortesi, T. Ginter, W. Mittig, A. Pype, M. K. SmithC. Soto, C. Sumithrarachchi, J. Swaim, S. Sweany, F. C.E. Teh, C. Y. Tsang, M. B. Tsang, N. Watwood, A. H. Wuosmaa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A challenge preventing successful inverse kinematics measurements with heavy nuclei that are not fully stripped is identifying and tagging the beam particles. For this purpose, the HEavy ISotope Tagger (HEIST) has been developed. HEIST utilizes two micro-channel plate timing detectors to measure the time-of-flight, a multi-sampling ion chamber to measure energy loss, and a high-purity germanium detector to identify isomer decays and calibrate the isotope identification system. HEIST has successfully identified 198Pb and other nearby nuclei at energies of about 75 MeV/A. In the experiment discussed, a typical cut containing 89% of all 198Pb80+ in the beam had a purity of 86%. We examine the issues of charge state contamination. The observed charge state populations of these ions are presented and, using an adjusted beam energy, are well described by the charge state model GLOBAL.

Original languageEnglish
Article number013306
Number of pages13
JournalReview of Scientific Instruments
Volume93
Issue number1
DOIs
Publication statusPublished - 31 Jan 2022
Externally publishedYes

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