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Atomic physics-HEDM

Atomic physics-HEDM. N°1 good news : US will focus on HEDM physics ! N°2 good news : SIS-100 will be funded : HEDgeHOB collaboration, 38 institutions, 13 countries  25 % of oral presentations at the HIF2004 addressed issues related to AP-HEDM (a part of Russia contribution missing)

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Atomic physics-HEDM

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  1. Atomic physics-HEDM • N°1 good news : US will focus on HEDM physics ! • N°2 good news : SIS-100 will be funded : HEDgeHOB collaboration, 38 institutions, 13 countries •  25 % of oral presentations at the HIF2004 addressed issues related to AP-HEDM (a part of Russia contribution missing) • Stopping (Hoffmann-Blazevic-Oguri), scattering(Maynard), resistivity (Udrea-Varentsov) in dense plasmas • EOS (Fortov, Tahir) • Instabilities (Bret, Clark, Piriz-Tahir) • AP : (Kaganovich, Olson, Dubois, Chung, Molvik) HIF2004

  2. Atomic physics • Beam loss during acceleration : • hybrid formula (Kaganovich) : for each impact parameter choose between quantum and Classical approximate formula, seems to work for the total el. loss • scaled formula Ar target (Dubois) 1400 data points, single and multiple ionisations  2 dispersion, highest energy limits for HIF by extrapolation ? • N-CTMC (Olson) U28+ time of life in SIS 100 3 to 5 times smaller than previous estimate. Ar and Xe ion colliding with H and N. Good agreement with experiment. Estimation for high energy limit HIF. Negative ions: a factor three. HIF2004

  3. Stopping in plasma • First experimental result of stopping with >1 (Hoffmann,Weyrich) • N° 1 rule for strongly coupled plasmas and Z>1 bound electrons play a significant role. (Also for EOS (Fortov)) • N° 2 rule : Do not expect very large effect -> accurate diagnostics are required! • Theory : • How the inner-shells are affected by a change of the outer-shell states ? • How a change in the inner-shell properties influence CX. Charge state analysis povide information on the wave function of inner-shell in the velocity space • Molecular dynamic simulation (Oguri) • Similar as cooling by eb (Erlangen group). Non linear effect for the recombination coefficient. • There is no classical linear stopping. Two perturbation parameters: Q/V and Q/(n(V/)3= (Q/V)(/V2) • Charge dependent stopping in solid (Blazevic) • A solid is a strongly coupled plasma • Still only few results • Still theoretical work to do HIF2004

  4. Diagnostic of plasma targets • A. Blazevic : stopping in laser created plasma required several diagnostics + modelisation. • The required uniformity of the target is determined not by the physical process you want to analyse but by the diagnostic you use ( SPQR, Orsay) • O. Rosmej diagnostic seems to be quite promissing, both for the projectile and the target atoms • Opacities are fundamental properties of dense plasmas, they provide unique tools to diagnose plasma target. • New diagnostics using LPS (Geissel, Ruhl, Maynard) HIF2004

  5. Dynamical properties of dense plasmas • Resistivity of ion heated plasmas (Varentsov) • Can yield the opportunity to compare with explosive wires: Normal or anomalous conductivity depending on the parameter <E2>/kT. • Gives the low velocity limit of the stopping • Yield information on the ion-ion structure factor. HIF2004

  6. N-electrons dynamics in strong fields • Applications : Hi-Ha collision, Fs-pulse laser interaction with gas, Diagnostics of dense plasma (relaxation process) • Other connection: e-3e experiments. • D. Hoffmann :  (V/)/V= 1/=10-(17-18) s, I Z2 a.u. • Classical mechanic is exact in the limit of short time. • n-CTMC is a very powerful method (Olson, Gruener, Maynard) • Initial state : Best classical approximation of the quantum Wigner quasi-distribution function • There is still a need to check and probably to improve in specific cases (quasi-neutral ion at high energies) HIF2004

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