TY - JOUR A1 - Schuppan, F. A1 - Röken, C. A1 - Fedrau, N. A1 - Becker Tjus, J. T1 - Ionisation as indicator for cosmic ray acceleration JO - ASTRA Proc. J1 - AP VL - 1 SP - 13 EP - 17 Y1 - 2014/06/02 PB - Copernicus Publications SN - 2199-3963 UR - https://ap.copernicus.org/articles/1/13/2014/ L1 - https://ap.copernicus.org/articles/1/13/2014/ap-1-13-2014.pdf DO - 10.5194/ap-1-13-2014 ER -