Plasma physics experiments at Z6:
Interaction of heavy ions with laser driven plasma
Ø energy loss of projectile ions in ideal / non-ideal plasma
Ø charge state distribution of ions penetrating plasma
Ø charge exchange processes in ionized matter
Ø probing of plasma properties by energy loss of heavy ions
Various plasma heating schemes
![](/fileadmin/_processed_/b/3/csm_ExpZ6_target1ab_74459bf5ae.png)
Direct heating
high Te
highly ionized
strong gradients
![](/fileadmin/_processed_/7/5/csm_ExpZ6_target2ab_23e2eab324.png)
Hohlraum heating
moderate Te
moderate ionized
homogeneous
Various targets
![](/fileadmin/_processed_/4/7/csm_ExpZ6_target3a_b93456c7c6.jpg)
Directly heated foil targets:
hot (Te > 200 eV)
plasma highly / fully ionized
plasma fast expanding
energy loss in ideal plasma
![](/fileadmin/_processed_/8/0/csm_ExpZ6_target3b_156ce64a55.jpg)
Hohlraum target with foil/foam:
homogeneous
moderate temperature
slow expansion
energy loss in non-ideal plasma
![](/fileadmin/_processed_/a/7/csm_ExpZ6_target3c_ece6b39dc3.jpg)
Direct heated foams:
smoothing of laser energy
slow expansion
super sonic ionization
![](/fileadmin/_processed_/7/3/csm_ExpZ6_target3d_6bc871c185.jpg)
Cryogenic H-target:
fully ionized plasma target
Charge exchange by free electrons
Recent results:
Energy loss and charge state distribution of Ar ions at 4 MeV/u penetrating a laser generated Carbon plasma
Projectile: 36Ar | Target: laser heated Carbon foil | Laser: nhelix (NdYAG) |
---|---|---|
Energy: 4 MeV/u | Thickness: 0.5 µm (100 µg/cm²) | Wavelength: 1064 nm |
Initial charge state: 16+ | Plasma density: 1018 – 1022 e/cm3 | Energy: 50 J |
Plasma temperature: up to 250 eV | Pulse length: 10 ns | |
Intensity: 5·1011 W/cm2 |
Collaboration: TU-Darmstadt; Uni-Frankfurt; VNIIEF-Sarov; ITEP-Moscow; LPI-Moscow