# Presentation: 505512

## 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)

## 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.

## 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

## 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)

## 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.

## 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)