The Potential of Hybrid Pixel Detectors in the Search for the Neutrinoless Double-Beta Decay of 116Cd
We investigated the potential of the energy resolving hybrid pixel detector Timepix contacted to a CdTe sensor layer for the search for the neutrinoless double-beta decay of Cd. We found that a CdTe sensor layer with 3 mm thickness and 165 μm pixel pitch is optimal with respect to the effective Majo...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2013-01-01
|
| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2013/105318 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849395305710092288 |
|---|---|
| author | Thilo Michel Thomas Gleixner Jürgen Durst Mykhaylo Filipenko Stefan Geißelsöder |
| author_facet | Thilo Michel Thomas Gleixner Jürgen Durst Mykhaylo Filipenko Stefan Geißelsöder |
| author_sort | Thilo Michel |
| collection | DOAJ |
| description | We investigated the potential of the energy resolving hybrid pixel detector Timepix contacted to a CdTe sensor layer for the search for the neutrinoless double-beta decay of Cd. We found that a CdTe sensor layer with 3 mm thickness and 165 μm pixel pitch is optimal with respect to the effective Majorana neutrino mass (mββ) sensitivity. In simulations, we were able to demonstrate a possible reduction of the background level caused by single electrons by approximately 75% at a specific background rate of 10−3 counts/(kg×keV×yr) at a
detection efficiency reduction of about 23% with track analysis employing random decision forests. Exploitation of the imaging properties with track analysis leads to an improvement in sensitivity to mββ by about 22%. After 5 years of measuring time, the sensitivity to mββ of a 420 kg CdTe experiment (90% Cd enrichment) would be 59 meV on a 90% confidence level for a specific single-electron background rate of 10−3 counts/(kg×keV×yr). The α-particle background can be suppressed by at least about six orders of magnitude. The benefit of
the hybrid pixel detector technology might be increased significantly if drift-time difference measurements would allow reconstruction of tracks in three dimensions. |
| format | Article |
| id | doaj-art-ab7d20db1ac04b4091f3a477c46dae35 |
| institution | Kabale University |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in High Energy Physics |
| spelling | doaj-art-ab7d20db1ac04b4091f3a477c46dae352025-08-20T03:39:40ZengWileyAdvances in High Energy Physics1687-73571687-73652013-01-01201310.1155/2013/105318105318The Potential of Hybrid Pixel Detectors in the Search for the Neutrinoless Double-Beta Decay of 116CdThilo Michel0Thomas Gleixner1Jürgen Durst2Mykhaylo Filipenko3Stefan Geißelsöder4Erlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander-Universität Erlangen-Nürnberg, Erwin-Rommel-Str. 1, 91058 Erlangen, GermanyErlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander-Universität Erlangen-Nürnberg, Erwin-Rommel-Str. 1, 91058 Erlangen, GermanyFaculty of Physics, Ludwig-Maximilians-Universität München, Schellingstr. 4, 80799 München, GermanyErlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander-Universität Erlangen-Nürnberg, Erwin-Rommel-Str. 1, 91058 Erlangen, GermanyErlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander-Universität Erlangen-Nürnberg, Erwin-Rommel-Str. 1, 91058 Erlangen, GermanyWe investigated the potential of the energy resolving hybrid pixel detector Timepix contacted to a CdTe sensor layer for the search for the neutrinoless double-beta decay of Cd. We found that a CdTe sensor layer with 3 mm thickness and 165 μm pixel pitch is optimal with respect to the effective Majorana neutrino mass (mββ) sensitivity. In simulations, we were able to demonstrate a possible reduction of the background level caused by single electrons by approximately 75% at a specific background rate of 10−3 counts/(kg×keV×yr) at a detection efficiency reduction of about 23% with track analysis employing random decision forests. Exploitation of the imaging properties with track analysis leads to an improvement in sensitivity to mββ by about 22%. After 5 years of measuring time, the sensitivity to mββ of a 420 kg CdTe experiment (90% Cd enrichment) would be 59 meV on a 90% confidence level for a specific single-electron background rate of 10−3 counts/(kg×keV×yr). The α-particle background can be suppressed by at least about six orders of magnitude. The benefit of the hybrid pixel detector technology might be increased significantly if drift-time difference measurements would allow reconstruction of tracks in three dimensions.http://dx.doi.org/10.1155/2013/105318 |
| spellingShingle | Thilo Michel Thomas Gleixner Jürgen Durst Mykhaylo Filipenko Stefan Geißelsöder The Potential of Hybrid Pixel Detectors in the Search for the Neutrinoless Double-Beta Decay of 116Cd Advances in High Energy Physics |
| title | The Potential of Hybrid Pixel Detectors in the Search for the Neutrinoless Double-Beta Decay of 116Cd |
| title_full | The Potential of Hybrid Pixel Detectors in the Search for the Neutrinoless Double-Beta Decay of 116Cd |
| title_fullStr | The Potential of Hybrid Pixel Detectors in the Search for the Neutrinoless Double-Beta Decay of 116Cd |
| title_full_unstemmed | The Potential of Hybrid Pixel Detectors in the Search for the Neutrinoless Double-Beta Decay of 116Cd |
| title_short | The Potential of Hybrid Pixel Detectors in the Search for the Neutrinoless Double-Beta Decay of 116Cd |
| title_sort | potential of hybrid pixel detectors in the search for the neutrinoless double beta decay of 116cd |
| url | http://dx.doi.org/10.1155/2013/105318 |
| work_keys_str_mv | AT thilomichel thepotentialofhybridpixeldetectorsinthesearchfortheneutrinolessdoublebetadecayof116cd AT thomasgleixner thepotentialofhybridpixeldetectorsinthesearchfortheneutrinolessdoublebetadecayof116cd AT jurgendurst thepotentialofhybridpixeldetectorsinthesearchfortheneutrinolessdoublebetadecayof116cd AT mykhaylofilipenko thepotentialofhybridpixeldetectorsinthesearchfortheneutrinolessdoublebetadecayof116cd AT stefangeißelsoder thepotentialofhybridpixeldetectorsinthesearchfortheneutrinolessdoublebetadecayof116cd AT thilomichel potentialofhybridpixeldetectorsinthesearchfortheneutrinolessdoublebetadecayof116cd AT thomasgleixner potentialofhybridpixeldetectorsinthesearchfortheneutrinolessdoublebetadecayof116cd AT jurgendurst potentialofhybridpixeldetectorsinthesearchfortheneutrinolessdoublebetadecayof116cd AT mykhaylofilipenko potentialofhybridpixeldetectorsinthesearchfortheneutrinolessdoublebetadecayof116cd AT stefangeißelsoder potentialofhybridpixeldetectorsinthesearchfortheneutrinolessdoublebetadecayof116cd |