1. Integration of the Targets: Cluster-Jet Target
PANDA Collaboration Meeting
March 2010
Integration of the Targets: Cluster-Jet Target
Alfons Khoukaz
Institut für Kernphysik, WWU Münster, Germany

2. Cluster-Target: Mechanical Integration
Vacuum pumps
Large pumping speed needed for
maximum target performance
good vacuum conditions
Pumps must be located close to the target(s)

3. Cluster-Target: Mechanical Integration
Aspects to be discussed:
Space required and reserved for the vacuum pumping systems
Design of a support structure (platform?) for the vacuum pumps
Service platform around the target hole for installation, operation and maintenance of the targets

4. Cluster-Target: Mechanical Integration
1 or 2 roots pumps
forepump
working platform?
cluster target

5. Forevacuum Pumps Possible forvacuum pumps
Screwline SP630: LBH=163x66x88 cm3, 530 kg or
Dryvac 650 S-i, 550 kg
Dryvac, 5000 RS-i, 1200 kg
Possible roots pump combination
Ruvac WH7000, LBH = 143x42x54 cm3, 650 kg
Ruvac WS2001, 460 kg

15. Safety Aspects: Hydrogen
Main target material for PANDA will be hydrogen (deuterium)
Explosive air mix: 4-77% (vol. concentration)
Explosive air mix: p > 50 mbar
→ Safety aspects must be considered in the design of both the vacuum system and the exhaust handling

16. Safety Aspects: Hydrogen
Vacuum system:
Vacuum pressures always below 0.1 mbar
Careful leak checks → pure hydrogen environment within vacuum systems
→ At no time explosive gas mix possible!
→ No ATEX classification!

17. Safety Aspects: Hydrogen
Pump exhausts:
Operation with hydrogen:
Extreme reduction of hydrogen concen-tration by dilution with large air flows
Emission of the diluted exhaust
Operation with deuterium: Regeneration
Pure D2 gas from pump exhaust will be compressed and used again in the targets

18. Summary
Place has to be reserved now for vacuum pumps (pumps will be bought this year)
Support structures and target-magnet connection points have to be defined
Working platform for both target types have to be considered in the further planning