CHICOX, a heavy-ion detection system for GRETA

Rhodes, D. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0009000178193952); Wu, C. Y. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000157727196); Henderson, J. [Univ. of Surrey, Guildford (United Kingdom)] (ORCID:0000000260109644); Heery, J. [Univ. of Surrey, Guildford (United Kingdom)] (ORCID:0000000230239907); Longfellow, B. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:000000018743962X); Müller-Gatermann, C. [Argonne National Laboratory (ANL), Lemont, IL (United States)] (ORCID:0000000291815568); Russell, R. [Univ. of Surrey, Guildford (United Kingdom)]; Willmott, G. [Univ. of Surrey, Guildford (United Kingdom)] (ORCID:0009000428851349)

doi:10.1016/j.nima.2026.171563

DOE OSTI · 3031223

CHICOX, a heavy-ion detection system for GRETA

Rhodes, D. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0009000178193952)·Wu, C. Y. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000157727196)·Henderson, J. [Univ. of Surrey, Guildford (United Kingdom)] (ORCID:0000000260109644)·Heery, J. [Univ. of Surrey, Guildford (United Kingdom)] (ORCID:0000000230239907)·Longfellow, B. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:000000018743962X)·Müller-Gatermann, C. [Argonne National Laboratory (ANL), Lemont, IL (United States)] (ORCID:0000000291815568)·Russell, R. [Univ. of Surrey, Guildford (United Kingdom)]·Willmott, G. [Univ. of Surrey, Guildford (United Kingdom)] (ORCID:0009000428851349)

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Abstract

The CHICOX detection system is an array of position sensitive parallel plate avalanche counters used for heavy ion detection in in-beam particle-gamma coincidence experiments. CHICOX, an upgrade of the CHICO2 array, is geometrically compatible with the GRETINA and GRETA gamma-ray arrays and provides an angular resolution sufficient to utilize the excellent position resolution of GRETINA/GRETA. CHICOX was successfully commissioned and fielded as an auxiliary detector to GRETINA in a campaign of stable-beam Coulomb excitation experiments at the ATLAS facility of Argonne National Laboratory. We report here on the design and in-beam performance of the CHICOX array.

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY Charged-particle detection In-beam nuclear spectroscopy Physics - Nuclear physics and radiation physics Position-sensitive PPACs

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Rhodes, D. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0009000178193952), Wu, C. Y. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:0000000157727196), Henderson, J. [Univ. of Surrey, Guildford (United Kingdom)] (ORCID:0000000260109644), Heery, J. [Univ. of Surrey, Guildford (United Kingdom)] (ORCID:0000000230239907), Longfellow, B. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)] (ORCID:000000018743962X), Müller-Gatermann, C. [Argonne National Laboratory (ANL), Lemont, IL (United States)] (ORCID:0000000291815568), Russell, R. [Univ. of Surrey, Guildford (United Kingdom)], Willmott, G. [Univ. of Surrey, Guildford (United Kingdom)] (ORCID:0009000428851349). 2026-04-13. CHICOX, a heavy-ion detection system for GRETA. https://doi.org/10.1016/j.nima.2026.171563

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