Status of the pbar separator at FAIR
(M. Helmecke, K. Knie, V. Gostichev, R. Hettinger)
• General overview, layout of the pbar separator
• Target handling concept
• FLUKA calculations
- for the target station
- for the shielding flask
FAIR accelerators
p-linac
SIS 100
SIS18 Upgrade
SIS 300
SIS100
p-linac
SuperFRS Target
SIS300
PANDA
SuperFRS
Antiproton
Production Target
HESR
HESR
Super- FRS
p-bar target
FLAIR
RESR
RESR
CR CR
NESR
Overview
pbar-building
Anti-Proton-Separator
Sections of the pbar separator
PS01 (vac.)
PS01 (air)
Target station with mounted target and
magnetic horn
BEAM
Target: 5 Nickel rods (3mm diameter,
100 mm length)
surrounded by graphite
in aluminum block, titanium windows
Assemblies to be disposed
Activation of
about 1011 Bq!
I= 400 kA
m ≈ 70 kg
m ≈ 120 kg
Residual dose rate around target station I
Determination of residual
dose rate important for
operation permission!
BEAM
concrete
air
Input parameters: 5e12p/s,
irradiation time: 3.16E7 s
Restricted area („Sperrbereich“)
iron
concrete
Controlled area („Kontrollbereich“)
Handling Area
air
Monitored area
(„Überwachungsbereich“)
max. 0.5 µSv/h
Transport concept in the pbar building
• Transport container pulls out
component (1)
• Moves to the shaft (2)
• Carrying frame lifts up the
component (3)
• Shielding flask is closed (4)
Residual dose of open target station
Input parameters: 5e12p/s, irradiation time: 3.16E7 s, cooling time: 1 week
Target and magnetic horn inside
[Sv/h]
Target and magnetic horn removed [Sv/h]
Door
• Irradiation with closed door THEN door is opened:
*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
ASSIGNMA
IRON
Door
VACUUM
[cm]
• THEN target and magnetic horn are set in the same way. (Not visible in geometry plot!)
Bring the target out of the target station
Top view, beam from left to right. Inner part of target station is always shielded
Target station and transport container in tunnel
Rail system
Process sequence:
• Transport container is
placed in front of target
Coupling
station.
system
• Door of target station and
transport container are
Trolley
opened.
Inner door
• Component is gripped by a
quick coupling system.
Front door (for
intervention only) • Trolley moves the
component via rail system
into the transport container.
• Doors are closed.
Transport concept in the pbar building
Residual dose during handling I:
Transport container in front of target station
Input parameters: 5e12p/s, irradiation time: 3.16E7 s, cooling time: 1 week
[Sv/h]
Door
Container
(iron)
• Irradiation:
target station is closed,
container not placed.
• THEN door of target
station is opened with
container in front
(subsidiary region
around container).
[cm]
*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
ASSIGNMA
IRON
Door
VACUUM
ASSIGNMA BLCKHOLE
Cont
VACUUM
Residual dose during handling II:
Activated target in transport container
Input parameters: 5e12p/s, irradiation time: 3.16E7 s, cooling time: 1 week
[Sv/h]
• Target activation by
primary beam inside
container with subsidiary
region around target.
• Door of target station
closed.
new target position
[cm]
*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
ASSIGNMA BLCKHOLE ContTar
VACUUM
ASSIGNMA
IRON
Door
Transport concept in the pbar building
Dose rate calculations for the shielding flask
Agreement: Design according to a dose rate at the surface of max.100 µSv/h.
[Sv/h]
Nickel target
• Primary beam activates target
directly inside of shielding,
but does not hit the flask
Iridium target
[cm]
Cross-check with Microshield *)
1250-3000 mm
max. 98 µSv/h
850-1250 mm
max. 95 µSv/h
0-850 mm
max. 72 µSv/h
[cm]
*) Kraftanlagen Heidelberg
Recent status....
APPENDIX
Overview of transport in building 6c II
3
1
2
FLUKA calculations of the collimators:
Beamline layout
Energy deposition in iron and aluminum collimators
Iron collimators
Aluminum collimators
Residual dose for different material combinations
Cooling time: 1 week, irradiation time: 3.16E7 s with 5E12 p/s
[Sv/h]
[Sv/h]
Al
Al
Al
Fe
[Sv/h]
[Sv/h]
Fe
Al
Fe
Fe