title: One long and two short pumping pulses control for plasma x-ray amplifier optimization.
abstract: Development of efficient soft x-ray laser plasma amplifiers adapted to seeded operation, requires a better control over amplifier transverse spatial extent, brilliance control and gain lifetime. Here it is shown that pumping the plasma amplifier with one long and two short pump pulses (1L2S) provides advantages in terms of control for the specified parameters in the case of Ni-like Ag x-ray laser. Also, significant tunability of the gain lifetime in the 1L2S pumping scheme for Ne-like Ti x-ray laser is observed. Direct harmonics seeding and chirped harmonics seeding amplification approaches may benefit from the control of the gain lifetime, in terms of better use of the pump energy and as a way to reduce the amplified spontaneous emission in x-ray lasers.
authors.forename: Gabriel V
authors.initials: GV
authors.lastname: Cojocaru
authors.forename: Razvan G
authors.initials: RG
authors.lastname: Ungureanu
authors.forename: Romeo A
authors.initials: RA
authors.lastname: Banici
authors.forename: Daniel
authors.initials: D
authors.lastname: Ursescu
authors.forename: Olivier
authors.initials: O
authors.lastname: Guilbaud
authors.forename: Olivier
authors.initials: O
authors.lastname: Delmas
authors.forename: Andrea
authors.initials: A
authors.lastname: Le Marec
authors.forename: Olivier
authors.initials: O
authors.lastname: Neveu
authors.forename: Julien
authors.initials: J
authors.lastname: Demailly
authors.forename: Moana
authors.initials: M
authors.lastname: Pittman
authors.forename: Sophie
authors.initials: S
authors.lastname: Kazamias
authors.forename: Sameh
authors.initials: S
authors.lastname: Daboussi
authors.forename: Kevin
authors.initials: K
authors.lastname: Cassou
authors.forename: Lu
authors.initials: L
authors.lastname: Li
authors.forename: Annie
authors.initials: A
authors.lastname: Klisnick
authors.forename: Phillipe
authors.initials: P
authors.lastname: Zeitoun
authors.forename: David
authors.initials: D
authors.lastname: Ros