@article{Warwick:2017:10.1103/PhysRevLett.119.185002,
author = {Warwick, J and Dzelzainis, T and Dieckmann, ME and Schumaker, W and Doria, D and Romagnani, L and Poder, K and Cole, JM and Alejo, A and Yeung, M and Krushelnick, K and Mangles, SPD and Najmudin, Z and Reville, B and Samarin, GM and Symes, DD and Thomas, AGR and Borghesi, M and Sarri, G},
doi = {10.1103/PhysRevLett.119.185002},
journal = {Physical Review Letters},
title = {Experimental observation of a current-driven instability in a neutral electron-positron beam},
url = {http://dx.doi.org/10.1103/PhysRevLett.119.185002},
volume = {119},
year = {2017}
}

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TY  - JOUR
AB  - We report on the first experimental observation of a current-driven instability developing in a quasineutral matter-antimatter beam. Strong magnetic fields (≥1  T) are measured, via means of a proton radiography technique, after the propagation of a neutral electron-positron beam through a background electron-ion plasma. The experimentally determined equipartition parameter of εB≈10−3 is typical of values inferred from models of astrophysical gamma-ray bursts, in which the relativistic flows are also expected to be pair dominated. The data, supported by particle-in-cell simulations and simple analytical estimates, indicate that these magnetic fields persist in the background plasma for thousands of inverse plasma frequencies. The existence of such long-lived magnetic fields can be related to analog astrophysical systems, such as those prevalent in lepton-dominated jets.
AU  - Warwick,J
AU  - Dzelzainis,T
AU  - Dieckmann,ME
AU  - Schumaker,W
AU  - Doria,D
AU  - Romagnani,L
AU  - Poder,K
AU  - Cole,JM
AU  - Alejo,A
AU  - Yeung,M
AU  - Krushelnick,K
AU  - Mangles,SPD
AU  - Najmudin,Z
AU  - Reville,B
AU  - Samarin,GM
AU  - Symes,DD
AU  - Thomas,AGR
AU  - Borghesi,M
AU  - Sarri,G
DO  - 10.1103/PhysRevLett.119.185002
PY  - 2017///
SN  - 0031-9007
TI  - Experimental observation of a current-driven instability in a neutral electron-positron beam
T2  - Physical Review Letters
UR  - http://dx.doi.org/10.1103/PhysRevLett.119.185002
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000414336400013&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/55754
VL  - 119
ER  - 

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