Investigation of Atomic Interactions in Supercritical Fields for FAIR-SPARC

1. Programme PN II / CAPACITIES Module III/ RO-CERN • Project type: FAIR • Experiment SPARC Project title: Atomic interactions in supercritical fields:  theoretical and experimental investigations for FAIR-SPARC Acronym:SCAFI 2014 - 2016 (24 months) Project coordinator - INFLPR (The National Institute for Laser, Plasma & Radiation Physics Partner 1 – IFIN-HH (Horia Hulubei National Institute of Physics and Nuclear Engineering) Partner 2 – ISS (Institute of Space Science) Contract value = 443,687 lei: • 2014: 74854 lei (INFLPR – 22457; IFIN – 37427; ISS – 14970) • 2015: 245889 lei (INFLPR – 109284; IFIN – 102454; ISS – 34151) • 2016: 122944 lei (INFLPR – 68303; IFIN – 34151; ISS – 20490) Request value = 1000000 lei: 2014: 100000 lei 2015: 720000 lei 2016: 180000 lei

2. PROJECT WORKPLAN

3. Project objectives Objective 1. The development of effective techniques producing highly efficient electron beams. Collaboration under WP 1.2 and WP 3.11 (Laser/Ion Interaction Working Groups); Objective 2. The development of x-ray laser experiments and theoretical modeling of the high harmonic generation. Collaboration under WP 1.2 and WP 3.11 (Laser/Ion Interaction Working Groups); Objective 3.Study of inelastic electron scattering by excited hydrogen atoms in a laser field; Objective 4. Evaluation of detection performances of a vacuum compatible Diamond-based segmented detector for relativistic highly-charged ions; Specific activities • Li-like ions spectroscopy of 2s-2p transitions (WP 3.11, WP 1.2, FAIR Baseline Technical Report, Vol.5). • Study the fundamental mechanism governing laser electron acceleration in the ‘long focus’ configuration • Design and development of a dedicated experiment for laser-electron acceleration in the ‚long focus’ configuration (the laser beam will reach the target with a much smaller divergence angle, but still reaching intensities in the 1019 range ). b) Investigation of the fundamental atomic processes in a cinematically complete fashion for the interaction of cooled heavy-ions up to bare nuclei with photons, electrons and protons (FBTR, Vol.5, WP 3.11, WP 1.2));

4. Computation of the transition energies and related parameters in ionic systems of interest for Li-like ions spectroscopy with x-ray lasers c) Development of X-ray laser (WP3.11, WP 1.2) directed towards the x-ray interaction with stored ions in the HESR; • Grazing-incidence pumped x-ray laser and study of high harmonic generation d) Study of inelastic electron-atom scattering in an electromagnetic field,multiphoton ionization of atoms. The working packages WP 2.1 and WP 2.2 (FBTR, Vol. 5) are concerned with setup preparation for single pass experiments with highly charged ions at high energies (1GeV/u to 10 GeV/u). • Elaboration of a theoretical model for the laser assisted inelastic electron scattering by excited hydrogen atoms; • Derivation of an analytical solution for laser assisted inelastic electron-excited hydrogen scattering. Computation and analysis of the numerical results for laser assisted inelastic electron scattering by excited hydrogen atoms. e) The manufacturing of an Diamond-based detector prototype, lab tests and in-beam assessment of its performances. • Realisation of the detector prototype, on an 20x 20 mm2 CVD diamond sample, segmented on both sides with orthogonal metallic strips • Lab tests with radioactive sources. • Detector evaluation with heavy ion beams.