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Status and Future Prospects of the NEWS-G Experiment
by P. Knights, on behalf of the NEWS-G Collaboration
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Submission summary
| Authors (as registered SciPost users): | Patrick Knights |
| Submission information | |
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| Preprint Link: | scipost_202210_00039v1 (pdf) |
| Date submitted: | 2022-10-04 13:59 |
| Submitted by: | Knights, Patrick |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 14th International Conference on Identification of Dark Matter (IDM2022) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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Abstract
The NEWS-G collaboration is searching for light dark matter using spherical proportional counters. Access to the mass range from 50 MeV to 10 GeV is enabled by the combination of low energy threshold, light gaseous targets (H, He, Ne), and highly radio-pure detector construction. Several of the recent developments that have paved the way for the operation of a new 140 cm in diameter, spherical proportional counter are presented. Constructed and commissioned at LSM using 4N copper with a $500\;\si{\micro\meter}$ electroplated inner layer, the detector is now installed in SNOLAB, where it has begun data taking. Building on the electroplating of the current detector, the collaboration construct its next detector directly in the underground laboratory, using ultra-pure copper electroforming. The design and construction of ECUME, a 140 cm in diameter spherical proportional counter fully electroformed underground is discussed, along with the potential to achieve sensitivity reaching the neutrino floor in light Dark Matter searches with a next-generation detector.
Current status:
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2022-10-19 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202210_00039v1, delivered 2022-10-19, doi: 10.21468/SciPost.Report.5927
Report
In this proceeding authors describing search for light dark matter using spherical proportional counters. The manuscript is clearly written and well organised. It is also suitably formatted for publication. I recommend the manuscript for publication with some recommendations.
Requested changes
I recommend the manuscript for publication with some recommendations:
- “Access to this region of parameter space requires either novel detection channels [5] or lower energy thresholds and light targets.” Can you provide references for “lower energy thresholds and light targets”?
- “This produced the most stringent constraint on the spin-indpendent DM-nucleon scattering cross-section, 4.4 × 10−37 cm2, for a 0.5 GeV mass DM candidate [10] ” misleading - result was published in 2017 and not anymore the most stringent. Rephrase or clarify?
- “The detector has since been installed inside…” - heavy, rephrase please
- “The next generation NEWS-G detectors will be constructed using ultra-pure copper electroforming [?] ” fix the referring
- On Fig1. Logo would be good to enlarge
- “The projected sensitivity of ECuME and DarkSPHERE in a DM-nucleon spin-independent cross-section versus DM mass is shown in Figure ??.” - provide correct link to the figure
- “Geant4 simulations” - provide references for Geant4
- Provide references to experiments shown at Fig3.
- Please check Acknowledgements if they are correct.
- Fix ref 14.