Cover Image

Characterisation of Hamamatsu R11065-20 PMTs for use in the SABRE South NaI(Tl) Crystal Detectors

Fuente: arXiv

Saved in:

Bibliographic Details
Main Authors:	Stanley, O., Melbourne, W. J. D., Urquijo, P., Barberio, E., Bashu, V. U., Bignell, L. J., Bolognino, I., Brooks, G., Chhun, S. S., Dastgiri, F., Froehlich, M. B., Fruth, T., Fu, G., Hill, G. C., James, R. S., Janssens, K., Kapoor, S., Lane, G. J., Leaver, K. T., McGee, P., McNamara, P. C., McKenzie, J., McKie, L. J., Mews, M., Milligan, L. J., Rule, K. J., Scutti, F., Slavkovska, Z., Stuchbery, A. E., Suerfu, B., Taylor, G. N., Williams, A. G., Xing, Y., Zhong, Y. Y.
Format:	Preprint
Published:	2025
Subjects:	Instrumentation and Detectors High Energy Physics - Experiment
Online Access:	Acceder al recurso
Tags:	Add Tag No Tags, Be the first to tag this record!

_version_	1866915677182361600
author	Stanley, O. Melbourne, W. J. D. Urquijo, P. Barberio, E. Bashu, V. U. Bignell, L. J. Bolognino, I. Brooks, G. Chhun, S. S. Dastgiri, F. Froehlich, M. B. Fruth, T. Fu, G. Hill, G. C. James, R. S. Janssens, K. Kapoor, S. Lane, G. J. Leaver, K. T. McGee, P. McNamara, P. C. McKenzie, J. McKie, L. J. Mews, M. Milligan, L. J. Rule, K. J. Scutti, F. Slavkovska, Z. Stuchbery, A. E. Suerfu, B. Taylor, G. N. Williams, A. G. Xing, Y. Zhong, Y. Y.
author_facet	Stanley, O. Melbourne, W. J. D. Urquijo, P. Barberio, E. Bashu, V. U. Bignell, L. J. Bolognino, I. Brooks, G. Chhun, S. S. Dastgiri, F. Froehlich, M. B. Fruth, T. Fu, G. Hill, G. C. James, R. S. Janssens, K. Kapoor, S. Lane, G. J. Leaver, K. T. McGee, P. McNamara, P. C. McKenzie, J. McKie, L. J. Mews, M. Milligan, L. J. Rule, K. J. Scutti, F. Slavkovska, Z. Stuchbery, A. E. Suerfu, B. Taylor, G. N. Williams, A. G. Xing, Y. Zhong, Y. Y.
contents	The SABRE Experiment is a direct detection dark matter experiment using a target composed of multiple NaI(Tl) crystals. The experiment aims to be an independent check of the DAMA/LIBRA results with a detector in the Northern (Laboratori Nazionali Del Gran Sasso, LNGS) and Southern (Stawell Underground Physics Laboratory, SUPL) hemispheres. The SABRE South photomultiplier tubes (PMTs) will be used near the low energy noise threshold and require a detailed calibration of their performance and contributions to the background in the NaI(Tl) dark matter search, prior to installation. We present the development of the pre-calibration procedures for the R11065-20 Hamamatsu PMTs. These PMTs are directly coupled to the NaI(Tl) crystals within the SABRE South experiment. In this paper we present methodologies to characterise the gain, dark rate, and timing properties of the PMTs. We develop a method for in-situ calibration without a light injection source. Additionally we explore the application of machine learning techniques using a Boosted Decision Tree (BDT) trained on the response of single PMTs to understand the information available for background rejection. Finally, we briefly present the simulation tool used to generate digitised PMT data from optical Monte Carlo simulations.
format	Preprint
id	arxiv_https___arxiv_org_abs_2504_17209
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Characterisation of Hamamatsu R11065-20 PMTs for use in the SABRE South NaI(Tl) Crystal Detectors Stanley, O. Melbourne, W. J. D. Urquijo, P. Barberio, E. Bashu, V. U. Bignell, L. J. Bolognino, I. Brooks, G. Chhun, S. S. Dastgiri, F. Froehlich, M. B. Fruth, T. Fu, G. Hill, G. C. James, R. S. Janssens, K. Kapoor, S. Lane, G. J. Leaver, K. T. McGee, P. McNamara, P. C. McKenzie, J. McKie, L. J. Mews, M. Milligan, L. J. Rule, K. J. Scutti, F. Slavkovska, Z. Stuchbery, A. E. Suerfu, B. Taylor, G. N. Williams, A. G. Xing, Y. Zhong, Y. Y. Instrumentation and Detectors High Energy Physics - Experiment The SABRE Experiment is a direct detection dark matter experiment using a target composed of multiple NaI(Tl) crystals. The experiment aims to be an independent check of the DAMA/LIBRA results with a detector in the Northern (Laboratori Nazionali Del Gran Sasso, LNGS) and Southern (Stawell Underground Physics Laboratory, SUPL) hemispheres. The SABRE South photomultiplier tubes (PMTs) will be used near the low energy noise threshold and require a detailed calibration of their performance and contributions to the background in the NaI(Tl) dark matter search, prior to installation. We present the development of the pre-calibration procedures for the R11065-20 Hamamatsu PMTs. These PMTs are directly coupled to the NaI(Tl) crystals within the SABRE South experiment. In this paper we present methodologies to characterise the gain, dark rate, and timing properties of the PMTs. We develop a method for in-situ calibration without a light injection source. Additionally we explore the application of machine learning techniques using a Boosted Decision Tree (BDT) trained on the response of single PMTs to understand the information available for background rejection. Finally, we briefly present the simulation tool used to generate digitised PMT data from optical Monte Carlo simulations.
title	Characterisation of Hamamatsu R11065-20 PMTs for use in the SABRE South NaI(Tl) Crystal Detectors
topic	Instrumentation and Detectors High Energy Physics - Experiment
url	https://arxiv.org/abs/2504.17209