1. Radiation-induced degradation of accelerator components/materials for FAIR
“hot spots”
SIS100 internal beam dump
Super-FRS production target
Beam catchers
Foil strippers for UNILAC upgrade

2. Radiation-induced degradation of accelerator components/materials for FAIR
understand materials failure due to extreme radiation
(targets, beam catchers, collimators....)
develop failure criteria
provide reliable lifetime predictions
develop monitor system
new solution for extreme conditions
In collaboration and synergy with activities
at LHC (CERN), FRIB (Michigan), RIBF (RIKEN)

3. Characterization of ion-induced radiation damage in graphite
PhD student: Christian Hubert Funding period:
Super-FRS target
Objective:
Investigate radiation damage and failure under intense and pulsed ion beams in graphite for of Super-FRS target; lifetime estimations
Challenge:
Extrapolate material behaviour exposed to high intensity FAIR beams using beam intensity available at present GSI facility
Status: - Mechanism of radiation damage at MeV-GeV energies and critical doses partially understood
- On-going study of ion-induced deformation and stresses; increasing beam intensities, pulsed beams
- Set of bulk samples for characterization of thermo- mechanical properties degradation - irradiated
Planned activities:
- damage identification
- mechanical stability
- thermal conductivity

4. Thermo-mechanical calculations of ion-induced stress waves in targets and beam catchers
PhD student: NN Funding period:
Thermal stress
induced crack
Ablation crater
Objective:
Use Finite Element codes for calculation of amplitude of stress waves induced by intense pulsed beams in targets and beam protection elements
Challenge:
Develop appropriate material models for graphite and other composite materials in extreme conditions
data
calc.
velocity
Planned activities:
- couple FLUKA calculations with material models
- simulation of stress wave amplitudes for different scenarios
- identify critical parameters
- suggest design optimization