Multi-cell trap developments towards the accumulation and confinement of large quantities of positrons.
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| Title: | Multi-cell trap developments towards the accumulation and confinement of large quantities of positrons. |
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| Authors: | Singer, M.1,2 (AUTHOR) martin.singer@ipp.mpg.de, Danielson, J.R.3 (AUTHOR), König, S.2 (AUTHOR), Pedersen, T. Sunn1,2 (AUTHOR), Schweikhard, L.2 (AUTHOR), Stenson, E.V.1 (AUTHOR) |
| Source: | Journal of Plasma Physics. Sep2023, Vol. 89 Issue 5, p1-20. 20p. |
| Subjects: | Plasma confinement, Electron plasma, Antiparticles, Magnetic fields, Positrons, Plasma devices, Electron traps |
| Abstract: | The multi-cell Penning–Malmberg trap concept has been proposed as a way to accumulate and confine unprecedented numbers of antiparticles, an attractive but challenging goal. We report on the commissioning and first results (using electron plasmas) of the World's second prototype of such a trap, which builds and improves on the findings of its predecessor. Reliable alignment of both 'master' and 'storage' cells with the axial magnetic field has enabled confinement of plasmas, without use of the 'rotating wall' (RW) compression technique, for over an hour in the master cell and tens of seconds in the storage cells. In the master cell, attachment to background neutrals is found to be the main source of charge loss, with an overall charge-confinement time of 8.6 h. Transfer to on-axis and off-axis storage cells has been demonstrated, with an off-axis transfer rate of $50\,\%$ of the initial particles, and confinement times in the storage cells in the tens of seconds (again, without RW compression). This, in turn, has enabled the first simultaneous plasma confinement in two off-axis cells, a milestone for the multi-cell trap concept. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Plasma Physics is the property of Cambridge University Press 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 |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 173490774 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Multi-cell trap developments towards the accumulation and confinement of large quantities of positrons. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Singer%2C+M%2E%22">Singer, M.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> martin.singer@ipp.mpg.de</i><br /><searchLink fieldCode="AR" term="%22Danielson%2C+J%2ER%2E%22">Danielson, J.R.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22König%2C+S%2E%22">König, S.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pedersen%2C+T%2E+Sunn%22">Pedersen, T. Sunn</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schweikhard%2C+L%2E%22">Schweikhard, L.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Stenson%2C+E%2EV%2E%22">Stenson, E.V.</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Plasma+Physics%22">Journal of Plasma Physics</searchLink>. Sep2023, Vol. 89 Issue 5, p1-20. 20p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Plasma+confinement%22">Plasma confinement</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+plasma%22">Electron plasma</searchLink><br /><searchLink fieldCode="DE" term="%22Antiparticles%22">Antiparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Positrons%22">Positrons</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+devices%22">Plasma devices</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+traps%22">Electron traps</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The multi-cell Penning–Malmberg trap concept has been proposed as a way to accumulate and confine unprecedented numbers of antiparticles, an attractive but challenging goal. We report on the commissioning and first results (using electron plasmas) of the World's second prototype of such a trap, which builds and improves on the findings of its predecessor. Reliable alignment of both 'master' and 'storage' cells with the axial magnetic field has enabled confinement of plasmas, without use of the 'rotating wall' (RW) compression technique, for over an hour in the master cell and tens of seconds in the storage cells. In the master cell, attachment to background neutrals is found to be the main source of charge loss, with an overall charge-confinement time of 8.6 h. Transfer to on-axis and off-axis storage cells has been demonstrated, with an off-axis transfer rate of $50\,\%$ of the initial particles, and confinement times in the storage cells in the tens of seconds (again, without RW compression). This, in turn, has enabled the first simultaneous plasma confinement in two off-axis cells, a milestone for the multi-cell trap concept. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Plasma Physics is the property of Cambridge University Press 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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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1017/S0022377823000855 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 20 StartPage: 1 Subjects: – SubjectFull: Plasma confinement Type: general – SubjectFull: Electron plasma Type: general – SubjectFull: Antiparticles Type: general – SubjectFull: Magnetic fields Type: general – SubjectFull: Positrons Type: general – SubjectFull: Plasma devices Type: general – SubjectFull: Electron traps Type: general Titles: – TitleFull: Multi-cell trap developments towards the accumulation and confinement of large quantities of positrons. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Singer, M. – PersonEntity: Name: NameFull: Danielson, J.R. – PersonEntity: Name: NameFull: König, S. – PersonEntity: Name: NameFull: Pedersen, T. Sunn – PersonEntity: Name: NameFull: Schweikhard, L. – PersonEntity: Name: NameFull: Stenson, E.V. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 09 Text: Sep2023 Type: published Y: 2023 Identifiers: – Type: issn-print Value: 00223778 Numbering: – Type: volume Value: 89 – Type: issue Value: 5 Titles: – TitleFull: Journal of Plasma Physics Type: main |
| ResultId | 1 |
