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Status and prospects of SABRE North
by A. Mariani, J. B. Benziger, F. Calaprice, S. Copello, I. Dafinei, D. D'Angelo, G. D'Imperio, G. Di Carlo, M. Diemoz, A. Di Giacinto, A. Di Ludovico, M. Ianna, A. Ianni, S. Milana, D. Orlandi, V. Pettinacci, L. Pietrofaccia, S. Rahatlou, B. Suerfu, C. Tomei, C. Vignoli, and A. Zani
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Submission summary
| Authors (as registered SciPost users): | Ambra Mariani |
| Submission information | |
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| Preprint Link: | scipost_202210_00014v1 (pdf) |
| Date submitted: | 2022-10-03 11:52 |
| Submitted by: | Mariani, Ambra |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 14th International Conference on Identification of Dark Matter (IDM2022) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
We present the characterization of a low background NaI(Tl) crystal for the SABRE North experiment. The crystal NaI-33, was studied in two different setups at Laboratori Nazion- ali del Gran Sasso, Italy. The Proof-of-Principle (PoP) detector was equipped with a liquid scintillator veto and collected data for about one month (90 kg×days). The PoP-dry setup consisted of NaI-33 in a purely passive shielding and collected data for almost one year (891 kg×days). The average background in the energy region of interest (1-6 keV) for dark matter search was 1.20 ± 0.05 and 1.39 ± 0.02 counts/day/kg/keV within the PoP and the PoP-dry setup, respectively. This result opens to a new shielding design for the physics phase of the SABRE North detector, that does not foresee the use of an organic liquid scintillator external veto.
Current status:
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2022-11-6 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202210_00014v1, delivered 2022-11-06, doi: 10.21468/SciPost.Report.6061
Report
In this proceeding author describes the characterization of background of NaI doped by Tl crystal studies in 2 setups. The results of analysis and developed background model presented. The manuscript is clearly written and well organised. It is also suitably formatted for publication.
I recommend the manuscript for publication after some minor comments:
- I was missing comparison of activities of key background contributors with ones in DAMA experiment or others.
- If your result proofs that liquid veto is not needed, what is the motivation to have one in SABRE South?
- Was not clear to me, where this crystal will be used? North?
Requested changes
- I was missing comparison of activities of key background contributors with ones in DAMA experiment or others.
- If your result proofs that liquid veto is not needed, what is the motivation to have one in SABRE South?
- Was not clear to me, where this crystal will be used? North?
Author: Ambra Mariani on 2022-12-20 [id 3162]
(in reply to Report 1 on 2022-11-06)1) Added a table containing the activities of the main background components measured by other NaI-based experiments. The table is separated from that of NaI-33 for space reasons.
2) The SABRE North Collaboration demonstrated that the use of the liquid scintillator is not strictly necessary to verify the DAMA/LIBRA result with the present level of background. In particular, this is true for the NaI-33 crystal, due to its very low content of K-40. However, since for the SABRE South laboratory there are no restrictions regarding the use of a liquid scintillator veto, and also the environmental radioactivity in the laboratory has not yet been fully measured, they could benefit of the use of the liquid scintillator.
3) This crystal will be used in the SABRE North setup.