Performance of an irradiated LHCb prototype p-on-n silicon microstrip detector by Bowcock, T, Buytaert, J, Casse, G, Charles, M, Dijkstra, H, Collins, P, Dormond, O, Ferro-Luzzi, M, Fiedler, F, Frei, R, Gagliardi, G, Jalocha, P, Libby, J, Ketel, T, Parkes, C, Parzefall, U, Ruf, T, Tareb, M, Teubert, F, Wright, V, Witek, M