Transient Collisionally Excited X-ray Lasers Pumped with One Long and Two Short Pulses

Ursescu, D; Cojocaru, G; Ungureanu, R; Banici, R; Ionel, L; Simion, S; Dabu, R; Tummler, J; Jung, R; Stiel, H; Delmas, O; Pittman, M; Guilbaud, O; Kazamias, S; Cassou, K; Demailly, J; Neveu, O; Baynard, E; Ros, D; Le Marec, A; Daboussi, S; Lu, L; Klisnick, A; Zeitoun, P