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Characterisation of low background CaWO4 crystals for CRESST-III
by A. Kinast, G. Angloher, S. Banik, G. Benato, A. Bento, A. Bertolini, R. Breier, C. Bucci, J. Burkhart, L. Canonica, A. D’Addabbo, S. Di Lorenzo, L. Einfalt, A. Erb, F. v. Feilitzsch, N. Ferreiro Iachellini, S. Fichtinger, D. Fuchs, A. Fuss, A. Garai, V.M. Ghete, S. Gerster, P. Gorla, P.V. Guillaumon, S. Gupta, D. Hauff, M. Ješkovský, J. Jochum, M. Kaznacheeva, H. Kluck, H. Kraus, A. Langenkämper, M. Mancuso, L. Marini, L. Meyer, V. Mokina, A. Nilima, M. Olmi, T. Ortmann, C. Pagliarone, L. Pattavina, F. Petricca, W. Potzel, P. Povinec, F. Pröbst, F. Pucci, F. Reindl, J. Rothe, K. Schäffner, J. Schieck, D. Schmiedmayer, S. Schönert, C. Schwertner, M. Stahlberg, L. Stodolsky, C. Strandhagen, R. Strauss, I. Usherov, F. Wagner, M. Willers, V. Zema (CRESST Collaboration)
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Submission summary
| Authors (as registered SciPost users): | Angelina Kinast · Valentyna Mokina |
| Submission information | |
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| Preprint Link: | scipost_202210_00023v1 (pdf) |
| Date accepted: | 2023-05-02 |
| Date submitted: | 2022-10-03 13:04 |
| Submitted by: | Kinast, Angelina |
| 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
The CRESST-III experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO4 target crystal. For many years CaWO4 crystals have successfully been produced in-house at Technische Universität München with a focus on high radiopurity. To further improve the CaWO4 crystals, an extensive chemical purification of the raw materials has been performed and the crystal TUM93 was produced from this powder. We present results from an α-decay rate analysis performed on 344 days of data collected in the ongoing CRESST-III data-taking campaign. The α-decay rate could significantly be reduced.
Published as SciPost Phys. Proc. 12, 031 (2023)
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2023-1-26 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202210_00023v1, delivered 2023-01-26, doi: 10.21468/SciPost.Report.6612
Report
The manuscript provides a radiopurity analysis of scintillating CaWO4 crystal used in the CRESST-III experiment, from the recorded data of $\alpha$-decay events. Additionally, it shows how nicely a new reconstruction method works to obtain the $\alpha$-decay pulse energy.
The manuscript is very well written to explain the physics, and the study is very useful in understanding the TUM93 crystals, which are crucial for the CRESST experiment. So I would strongly recommend its publication in SciPost Physics Proceedings.