The Short-Pulsed Particle and Radiation Center at the Forschungszentrum Jülich (JuSPARC) is an interdisciplinary center for collaborative research using ultra-short pulsed photon bunches and, in a later stage, particle beams. These are generated employing the radiation from high-power, short-pulse lasers with pulse durations in the 10 fs range, using nonlinear up-conversion schemes and novel target technologies.
JuSPARC is a part of the Jülich Multi-Method Platform which makes Jülich’s expertise in methodology available to scientists, and in particular to facilitate the appropriate combination of different methods for scientific analysis. The layout of JuSPARC is governed by the requirements of particular applications and we follow the principle that “the experiment defines the facility”.
JuSPARC is operated by the Peter Grünberg Institute ( PGI-6) and will be realized in stages: JuSPARC-1 is a user facility for the investigation of ultra-short dynamics in condensed-matter systems. It is based on two femtosecond lasers, the first built by Thales with a pulse energy of 40 mJ at a repetition rate of 1 kHz, the second from Amphos at 50 µJ and up to 10 MHz. With up-converted photon energies up to 200 eV, time-resolved studies of electronic states and spin-dependent processes are carried out in pump-probe experiments:
• Element selective magneto optics in the VUV range (T-MOKE)
• Combined magneto optics / electron spectroscopy in the SX range (PMOKE)
• Spin-resolved momentum microscopy (SPEMM)
In parallel to the operation of JuSPARC-1 we carry out experiments at external laser facilities of the multi-100-TW and PW class (e.g. Phelix in Darmstadt and SULF in Shanghai). They focus on the generation of polarized particle beams and electron/proton acceleration in the so-called bubble regime. These studies will also lay the foundations for the design of JuSPARC-2.
JuSPARC is part of the ATHENA consortium, the Helmholtz project for laser-plasma acceleration.