Abstract
The design and performance of a new Compton-suppressed HPGe and charged-particle array, CLARION2-TRINITY, are described. The TRINITY charged-particle array is comprised of 64 Cerium-doped Gadolinium Aluminum Gallium Garnet (GAGG:Ce) crystals configured into five rings spanning 7–54 degrees, and two annular silicon detectors that can shadow or extend the angular coverage to backward angles with minimal γ-ray attenuation. GAGG:Ce is a non-hygroscopic, bright, and relatively fast scintillator with a light distribution well matched to SiPMs. Count rates up to 40 kHz per crystal are sustainable. Fundamental characteristics of GAGG:Ce are measured and presented, including light- and heavy-ion particle identification (PID) capability, pulse-height defects, radiation hardness, and emission spectra. The CLARION2 array consists of up to 16 Compton-suppressed HPGe Clover detectors (≈4% efficiency at 1 MeV) configured into four rings (eight HPGe crystal rings) using a non-Archimedean geometry that suppresses back-to-back coincident 511-keV gamma rays. The entire array is instrumented with 100- and 500-MHz (14 bit) waveform digitizers which enable triggerless operation, pulse-shape discrimination, fast timing, and pileup correction. Finally, two examples of experimental data taken during the commissioning of the CLARION2-TRINITY system are given: a PID spectrum from 16O + 18O fusion-evaporation, and PID and Doppler-corrected γ-ray spectra from 48Ti + 12C Coulomb excitation.
| Original language | English |
|---|---|
| Article number | 167392 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
| Volume | 1041 |
| DOIs | |
| State | Published - Oct 11 2022 |
Funding
The authors thank D. C. Radford, A. Galindo-Uribarri, R. Grzywacz, and W. Reviol for enlightening conversations on detectors and spectroscopy techniques which stimulated and inspired some of the CLARION2-TRINITY design. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. This work was supported in part by the U.S. National Science Foundation through grant NSF20-12522, by Australian Research Council Grant No. DP170101673, and by the International Technology Center Pacific (ITC-PAC) under Contract Nos. FA520917Q0070 and FA520919PA138. Support for the ANU Heavy Ion Accelerator Facility operations through the Australian National Collaborative Research Infrastructure Strategy (NCRIS) is also acknowledged. T. J. G. and M. S. M. G. acknowledge the support of the Australian Government Research Training Program. The publisher acknowledges the US government license to provide public access under the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). The authors thank D. C. Radford, A. Galindo-Uribarri, R. Grzywacz, and W. Reviol for enlightening conversations on detectors and spectroscopy techniques which stimulated and inspired some of the CLARION2-TRINITY design. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. This work was supported in part by the U.S. National Science Foundation through grant NSF20-12522 , by Australian Research Council Grant No. DP170101673 , and by the International Technology Center Pacific (ITC-PAC) under Contract Nos. FA520917Q0070 and FA520919PA138 . Support for the ANU Heavy Ion Accelerator Facility operations through the Australian National Collaborative Research Infrastructure Strategy (NCRIS) is also acknowledged. T. J. G. and M. S. M. G. acknowledge the support of the Australian Government Research Training Program. The publisher acknowledges the US government license to provide public access under the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).
Keywords
- Charged particle scintillator
- Compton-suppressed high purity germanium array
- GAGG:Ce
- Light quenching