1. Vacuum chamber for experiment HIHEX at FAIR
Nikolay Shilkin
Institute of Problems of Chemical Physics
12/12/2010 Obninsk

2. Heavy Ion Heating and EXpansion
HIHEX-
Heavy Ion Heating and EXpansion
Target
Window
Ion Beam

3. Main Requirements
1. The design of the chamber represents a selfcontained shell, which is sealed both up to, and during experiment.
2. The chamber should maintain repeated dynamic loads in frequent experiments and provide long-time exploitation
3. Inside the chamber the systems of storage of targets, robot - manipulator for target handling and stage with final adjustment of the target are arranged.
4. The chamber is equipped with bearings, flanges for connection of vacuum pumps, standard optical and electrical ports for recording equipment and other systems.
5. The design of the chamber provides simultaneous input of radiation from accelerator SIS-100, SIS-18 and laser PHELIX
6. The design of the chamber allows addition of new modules enhancing its possibilities.
7. The chamber is supplied with systems of inflow, venting, and also vacuum system.
8. It is equipped with ports for friend access to an internal part.
9. The design of the chamber allows a capability of integrating additional systems, such as, cooling system, beam dump, emergency shutter for fast separation of a volume of the chamber from an accelerating channel etc.

4. Heavy Ion Beams at GSI and FAIR
Ion energy
400 MeV/u
MeV/u
Number of ions per bunch
4 x 109
2 x 1012
Beam duration
130 ns
50 ns
Beam Energy
0.05 kJ
100 kJ
Beam focal spot
1 mm2
Lead Target
Ion Range
5 mm
5-60 mm
Specific energy deposition
1 kJ/g
600 kJ/g
Specific power deposition
5 GW/g
12 TW/g

5. Possible designs Design #1 Design #2 Chamber design
Steel sphere with diameter of 2.5 m and thickness 1 cm
Steel sphere with diameter of 1 m and thickness 0.5 cm
Mass, t 2
0.25
The chamber heating per bunch at total energy deposition 90 kJ, К
0.1 1
Specific impulse on the wall
0.1 kg/ (m s)
0.9 kg /(m s)
Time of reflecting the impulse
10-6 s s
Dynamic pressure on the wall
1 atm
18 atm