Scaled prototype of a tantalum target embedded in expanded graphite for antiproton production: Design, manufacturing, and testing under proton beam impacts
This study presents a further step within the ongoing R&D activities for the redesign of the CERN’s Antiproton Decelerator Production Target (AD-Target). A first scaled target prototype, constituted of a sliced core made of ten Ta rods -8 mm diameter, 16 mm length-embedded in a compressed expan...
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2018-07-01
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Series: | Physical Review Accelerators and Beams |
Online Access: | http://doi.org/10.1103/PhysRevAccelBeams.21.073001 |
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doaj-4359586548274793b446c937489929b22020-11-24T22:16:06ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882018-07-0121707300110.1103/PhysRevAccelBeams.21.073001Scaled prototype of a tantalum target embedded in expanded graphite for antiproton production: Design, manufacturing, and testing under proton beam impactsClaudio Torregrosa MartinMarco CalvianiAntonio Perillo-MarconeRomain FerriereNicola SolieriMark ButcherLucian-Mircea GrecJoao Canhoto EspadanalThis study presents a further step within the ongoing R&D activities for the redesign of the CERN’s Antiproton Decelerator Production Target (AD-Target). A first scaled target prototype, constituted of a sliced core made of ten Ta rods -8 mm diameter, 16 mm length-embedded in a compressed expanded graphite (EG) matrix, inserted in a 44 mm diameter Ti-6Al-4V container, has been built and tested under proton beam impacts at the CERN’s HiRadMat facility, in the so called HRMT-42 experiment. This prototype has been designed following the lessons learned from previous numerical and experimental works (HRMT-27 experiment) aiming at answering the open questions left in these studies. Velocity data recorded on-line at the target periphery during the HRMT-42 experiment is presented, showing features of its dynamic response to proton beam impacts. Furthermore, x-ray and neutron tomographies of the target prototype after irradiation have been performed. These non-destructive techniques show the extensive plastic deformation of the Ta core, but suggest that the EG matrix can adapt to such deformation, which is a positive result. The neutron tomography successfully revealed the internal state of the tantalum core, showing the appearance of voids of several hundreds of micrometers, in particular in the downstream rods of the core. The possible origin of such voids is discussed while future microstructure analysis after the target opening will try to clarify their nature.http://doi.org/10.1103/PhysRevAccelBeams.21.073001 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Claudio Torregrosa Martin Marco Calviani Antonio Perillo-Marcone Romain Ferriere Nicola Solieri Mark Butcher Lucian-Mircea Grec Joao Canhoto Espadanal |
spellingShingle |
Claudio Torregrosa Martin Marco Calviani Antonio Perillo-Marcone Romain Ferriere Nicola Solieri Mark Butcher Lucian-Mircea Grec Joao Canhoto Espadanal Scaled prototype of a tantalum target embedded in expanded graphite for antiproton production: Design, manufacturing, and testing under proton beam impacts Physical Review Accelerators and Beams |
author_facet |
Claudio Torregrosa Martin Marco Calviani Antonio Perillo-Marcone Romain Ferriere Nicola Solieri Mark Butcher Lucian-Mircea Grec Joao Canhoto Espadanal |
author_sort |
Claudio Torregrosa Martin |
title |
Scaled prototype of a tantalum target embedded in expanded graphite for antiproton production: Design, manufacturing, and testing under proton beam impacts |
title_short |
Scaled prototype of a tantalum target embedded in expanded graphite for antiproton production: Design, manufacturing, and testing under proton beam impacts |
title_full |
Scaled prototype of a tantalum target embedded in expanded graphite for antiproton production: Design, manufacturing, and testing under proton beam impacts |
title_fullStr |
Scaled prototype of a tantalum target embedded in expanded graphite for antiproton production: Design, manufacturing, and testing under proton beam impacts |
title_full_unstemmed |
Scaled prototype of a tantalum target embedded in expanded graphite for antiproton production: Design, manufacturing, and testing under proton beam impacts |
title_sort |
scaled prototype of a tantalum target embedded in expanded graphite for antiproton production: design, manufacturing, and testing under proton beam impacts |
publisher |
American Physical Society |
series |
Physical Review Accelerators and Beams |
issn |
2469-9888 |
publishDate |
2018-07-01 |
description |
This study presents a further step within the ongoing R&D activities for the redesign of the CERN’s Antiproton Decelerator Production Target (AD-Target). A first scaled target prototype, constituted of a sliced core made of ten Ta rods -8 mm diameter, 16 mm length-embedded in a compressed expanded graphite (EG) matrix, inserted in a 44 mm diameter Ti-6Al-4V container, has been built and tested under proton beam impacts at the CERN’s HiRadMat facility, in the so called HRMT-42 experiment. This prototype has been designed following the lessons learned from previous numerical and experimental works (HRMT-27 experiment) aiming at answering the open questions left in these studies. Velocity data recorded on-line at the target periphery during the HRMT-42 experiment is presented, showing features of its dynamic response to proton beam impacts. Furthermore, x-ray and neutron tomographies of the target prototype after irradiation have been performed. These non-destructive techniques show the extensive plastic deformation of the Ta core, but suggest that the EG matrix can adapt to such deformation, which is a positive result. The neutron tomography successfully revealed the internal state of the tantalum core, showing the appearance of voids of several hundreds of micrometers, in particular in the downstream rods of the core. The possible origin of such voids is discussed while future microstructure analysis after the target opening will try to clarify their nature. |
url |
http://doi.org/10.1103/PhysRevAccelBeams.21.073001 |
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