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Radiopurity of micromegas readout planes

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Title: Radiopurity of micromegas readout planes
Authors: Cebrián, S.1, Dafni, T.1, Ferrer-Ribas, E.2, Galán, J.1, Giomataris, I.2, Gómez, H.1 hgomez@unizar.es, Iguaz, F.J.1, Irastorza, I.G.1, Luzón, G.1, de Oliveira, R.3, Rodríguez, A.1, Seguí, L.1, Tomás, A.1, Villar, J.A.1
Source: Astroparticle Physics. Jan2011, Vol. 34 Issue 6, p354-359. 6p.
Subjects: Time projection chambers (Nuclear physics), Detectors, Particles (Nuclear physics), Double beta decay, Axions, Spectrometry
Abstract: Abstract: Micromesh gas amplification structures (Micromegas) are being used in an increasing number of particle physics applications since their conception 14 years ago. More recently, they are being used or considered as readout of time projection chambers (TPCs) in the field of Rare Event searches (dealing with dark matter, axions or double beta decay). In these experiments, the radiopurity of the detector components and surrounding materials is measured and finely controlled in order to keep the experimental background as low as possible. In the present paper, the first measurement of the radiopurity of Micromegas planes obtained by high purity germanium spectrometry in the low background facilities of the Canfranc Underground Laboratory (LSC) is presented. The obtained results prove that Micromegas readouts of the microbulk type are currently manufactured with radiopurity levels below 30μBq/cm2 for Th and U chains and ∼60μBq/cm2 for 40K, already comparable to the cleanest detector components of the most stringent low background experiments at present. Taking into account that the studied readouts were manufactured without any specific control of the radiopurity, it should be possible to improve these levels after dedicated development. [Copyright &y& Elsevier]
Copyright of Astroparticle Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Radiopurity of micromegas readout planes
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  Data: <searchLink fieldCode="AR" term="%22Cebrián%2C+S%2E%22">Cebrián, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Dafni%2C+T%2E%22">Dafni, T.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ferrer-Ribas%2C+E%2E%22">Ferrer-Ribas, E.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Galán%2C+J%2E%22">Galán, J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Giomataris%2C+I%2E%22">Giomataris, I.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Gómez%2C+H%2E%22">Gómez, H.</searchLink><relatesTo>1</relatesTo><i> hgomez@unizar.es</i><br /><searchLink fieldCode="AR" term="%22Iguaz%2C+F%2EJ%2E%22">Iguaz, F.J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Irastorza%2C+I%2EG%2E%22">Irastorza, I.G.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Luzón%2C+G%2E%22">Luzón, G.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22de+Oliveira%2C+R%2E%22">de Oliveira, R.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Rodríguez%2C+A%2E%22">Rodríguez, A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Seguí%2C+L%2E%22">Seguí, L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Tomás%2C+A%2E%22">Tomás, A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Villar%2C+J%2EA%2E%22">Villar, J.A.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Astroparticle+Physics%22">Astroparticle Physics</searchLink>. Jan2011, Vol. 34 Issue 6, p354-359. 6p.
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  Data: Abstract: Micromesh gas amplification structures (Micromegas) are being used in an increasing number of particle physics applications since their conception 14 years ago. More recently, they are being used or considered as readout of time projection chambers (TPCs) in the field of Rare Event searches (dealing with dark matter, axions or double beta decay). In these experiments, the radiopurity of the detector components and surrounding materials is measured and finely controlled in order to keep the experimental background as low as possible. In the present paper, the first measurement of the radiopurity of Micromegas planes obtained by high purity germanium spectrometry in the low background facilities of the Canfranc Underground Laboratory (LSC) is presented. The obtained results prove that Micromegas readouts of the microbulk type are currently manufactured with radiopurity levels below 30μBq/cm2 for Th and U chains and ∼60μBq/cm2 for 40K, already comparable to the cleanest detector components of the most stringent low background experiments at present. Taking into account that the studied readouts were manufactured without any specific control of the radiopurity, it should be possible to improve these levels after dedicated development. [Copyright &y& Elsevier]
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  Data: <i>Copyright of Astroparticle Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.astropartphys.2010.09.003
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      – Code: eng
        Text: English
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      – SubjectFull: Time projection chambers (Nuclear physics)
        Type: general
      – SubjectFull: Detectors
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      – SubjectFull: Particles (Nuclear physics)
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      – SubjectFull: Double beta decay
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      – SubjectFull: Axions
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      – SubjectFull: Spectrometry
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      – TitleFull: Radiopurity of micromegas readout planes
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              Text: Jan2011
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