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Reduction in radioactivity-induced backgrounds using a novel active veto detector for rare event search experiments
by M. Chaudhuri , A. Jastram, G. Agnolet, S. Banik , H. Chen, V. Iyer, V. K. S. Kashyap, A. Kubik, M. Lee, R. Mahapatra, S. Maludze, N. Mirabolfathi, N. Mishra, B. Mohanty, H. Neog, M. Platt
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Submission summary
| Authors (as registered SciPost users): | Mouli Chaudhuri |
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| Preprint Link: | scipost_202210_00069v1 (pdf) |
| Date accepted: | 2023-03-07 |
| Date submitted: | 2022-10-17 09:14 |
| Submitted by: | Chaudhuri, Mouli |
| 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 results of a newly developed annular cryogenic phonon-mediated active veto detector are discussed which shows a significant reduction of radioactivity-induced backgrounds in rare event search experiments. The veto detector is made up of germanium weighing ∼500 g with an outer diameter of 76 mm and an inner diameter of 28 mm. The detector can host a 25 mm diameter germanium inner target detector of mass ∼10 g. A GEANT4 simulation with the active veto and inner target detector shows a gamma background reduction of 50 - 80% which is further improved (> 90%) with 4π veto coverage. Experimental measurements with the detector assembly agree well with the simulation.
Published as SciPost Phys. Proc. 12, 017 (2023)
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2022-11-8 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202210_00069v1, delivered 2022-11-08, doi: 10.21468/SciPost.Report.6095
Strengths
Authors presenting a newly developed annular cryogenic phonon-mediated active veto detector, which allows to reduce the coincident background by >90%. This veto detector would be operated at mK temperatures. It was successfully tested and verified by simulations. Future development will make possible a great background reduction for SuperCDMS SNOLAB.
Weaknesses
Some things which can be fixed during post-production. For example:
- Radioactivity induced or Radioactivity-induced?
- Compton scatter events -> scattering?
Report
The manuscript is clearly written and well organized. I recommend the manuscript for publication in its present form.
Author: Mouli Chaudhuri on 2022-11-10 [id 3002]
(in reply to Report 1 on 2022-11-08)Thank you for recommending the manuscript for publication.