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Analysis of radiation damage in silicon charge-coupled devices used for dark matter searches.
by Steven J. Lee on behalf of DAMIC-M collaboration
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Submission summary
| Authors (as registered SciPost users): | Steven Lee |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202210_00009v1 (pdf) |
| Date submitted: | 2022-10-02 15:16 |
| Submitted by: | Lee, Steven |
| 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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| Approach: | Experimental |
Abstract
Nuclear recoils in crystal detectors generate radiation damage in the form of crystal defects that can be measured in scientific-grade CCDs as local hot spots of leakage current stimulated by temperature increases in the devices. In this proceeding, we use a neutron source to generate defects in DAMIC-M CCDs, and using increases in leakage current at different temperatures, we demonstrate a procedure for identifying crystal defects in the CCDs of the DAMIC-M experiment. This is the first time that individual defects generated from nuclear recoils have been studied. This technique could be used to distinguish nuclear recoils from electron recoils in some energy ranges, which would improve the ability of CCD detectors to search for weakly interacting dark matter.
Current status:
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2022-11-7 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202210_00009v1, delivered 2022-11-07, doi: 10.21468/SciPost.Report.6073
Strengths
Pioneering work in this direction. Very well written text with explanations.
Weaknesses
some typos
Report
In this manuscript author (on behalf of collaboration) describes the result of first time study of individual defects in crystal generated by nuclear recoils. The study was done using DAMIC-M CCDs in the temperature range 120-200K and creates a solid background for future searches for daily modulations in WIMP interaction’s rate.
The manuscript is clearly written and well organised.
I recommend the manuscript for publication after clarification of:
Requested changes
- Can you please add to the text what is X on Fig2 stands for?
Author: Steven Lee on 2022-11-07 [id 2990]
(in reply to Report 1 on 2022-11-07)Thank you the comments.
X in Figure 2 have been described as unidentified defect species with specific bandgap deformation in the text. I've also added a separate citation for the left of Figure 2.
A new version has been submitted to arXiV and submission to Scipost will follow when available.
Attachment:
For_arxiv_SJLPHI_IDM2022_Proceeding.pdf