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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
Submission information
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
Academic field: Physics
  • High-Energy Physics - Experiment
Approach: Experimental


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

Anonymous Report 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


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.


Some things which can be fixed during post-production. For example:
- Radioactivity induced or Radioactivity-induced?
- Compton scatter events -> scattering?


The manuscript is clearly written and well organized. I recommend the manuscript for publication in its present form.

  • validity: -
  • significance: good
  • originality: high
  • clarity: high
  • formatting: good
  • grammar: -

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.

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