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First simultaneous detection of electron and positron bunches at the positron capture section of the SuperKEKB factory

The direct simultaneous detection of electron and positron bunch signals was successfully performed for the first time with wideband pickups and a detection system at the positron capture section of the SuperKEKB factory. The time interval between the electron and positron bunches, their bunch lengt...

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Autores principales: Suwada, Tsuyoshi, Rehman, Muhammad Abdul, Miyahara, Fusashi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8211830/
https://www.ncbi.nlm.nih.gov/pubmed/34140537
http://dx.doi.org/10.1038/s41598-021-91707-0
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author Suwada, Tsuyoshi
Rehman, Muhammad Abdul
Miyahara, Fusashi
author_facet Suwada, Tsuyoshi
Rehman, Muhammad Abdul
Miyahara, Fusashi
author_sort Suwada, Tsuyoshi
collection PubMed
description The direct simultaneous detection of electron and positron bunch signals was successfully performed for the first time with wideband pickups and a detection system at the positron capture section of the SuperKEKB factory. The time interval between the electron and positron bunches, their bunch lengths, and bunch intensities depending on the phase of accelerating structures were measured to investigate their capture process and to maximally optimize the positron intensity. The results show that the time intervals were measured in the range of 135–265 ps, and the line-order switch of the electron and positron bunches in the axial direction was clearly observed as a function of the phase. The positron (electron) intensity was maximized at the optimal phase (180[Formula: see text] shifted from the optimum). These series of measurements have never been experimentally conducted so far. It is demonstrated that the positron intensity can be systematically optimized with this system as functions of beam parameters in multidimensional spaces for any positron capture section.
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spelling pubmed-82118302021-06-21 First simultaneous detection of electron and positron bunches at the positron capture section of the SuperKEKB factory Suwada, Tsuyoshi Rehman, Muhammad Abdul Miyahara, Fusashi Sci Rep Article The direct simultaneous detection of electron and positron bunch signals was successfully performed for the first time with wideband pickups and a detection system at the positron capture section of the SuperKEKB factory. The time interval between the electron and positron bunches, their bunch lengths, and bunch intensities depending on the phase of accelerating structures were measured to investigate their capture process and to maximally optimize the positron intensity. The results show that the time intervals were measured in the range of 135–265 ps, and the line-order switch of the electron and positron bunches in the axial direction was clearly observed as a function of the phase. The positron (electron) intensity was maximized at the optimal phase (180[Formula: see text] shifted from the optimum). These series of measurements have never been experimentally conducted so far. It is demonstrated that the positron intensity can be systematically optimized with this system as functions of beam parameters in multidimensional spaces for any positron capture section. Nature Publishing Group UK 2021-06-17 /pmc/articles/PMC8211830/ /pubmed/34140537 http://dx.doi.org/10.1038/s41598-021-91707-0 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Suwada, Tsuyoshi
Rehman, Muhammad Abdul
Miyahara, Fusashi
First simultaneous detection of electron and positron bunches at the positron capture section of the SuperKEKB factory
title First simultaneous detection of electron and positron bunches at the positron capture section of the SuperKEKB factory
title_full First simultaneous detection of electron and positron bunches at the positron capture section of the SuperKEKB factory
title_fullStr First simultaneous detection of electron and positron bunches at the positron capture section of the SuperKEKB factory
title_full_unstemmed First simultaneous detection of electron and positron bunches at the positron capture section of the SuperKEKB factory
title_short First simultaneous detection of electron and positron bunches at the positron capture section of the SuperKEKB factory
title_sort first simultaneous detection of electron and positron bunches at the positron capture section of the superkekb factory
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8211830/
https://www.ncbi.nlm.nih.gov/pubmed/34140537
http://dx.doi.org/10.1038/s41598-021-91707-0
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