Observation of energetic protons trapped in laboratory magnetic-tower jets oleh F Suzuki-Vidal, S Patankar, S V Lebedev, S N Bland, H Doyle, D Bigourd, G Burdiak, P de Grouchy, G N Hall, A J Harvey-Thompson, E Khoory, L Pickworth, J Skidmore, R A Smith, G F Swadling