Task7: NUSTAR2 Design and Prototype Construction of a RadiationResistant Magnet

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Task7 NUSTAR2 - Design and Prototype
Construction of a Radiation-Resistant Magnet
Martin Winkler Kick-off meeting EU DS
"DIRACsecondary-Beams", April 14-15, 2005, GSI,
Darmstadt, Germany

• The Pre-Separator of the Super-FRS
• Sub-Tasks of NUSTAR2 (Choice)
• Implementation Plan, Milestones Deliverables
• Project Resources and Budget

Task leader of NUSTAR2 Gebhard Moritz, GSI
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Design parameters and layout of the Super-FRS
Design Parameters
High-radiation area

• Large phase space ? large aperture magnets
• High beam energies large apertures
• ? high pole tip fields for quadrupols
• ? use superconducting magnets

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Requirements of Magnetic Elements of the
Preseparator
Can the magnets stay superconducting after the
target and beam dumps?
PF2
1,3
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Beam dump locations in the 1st stage of the
Pre-Separator
Trajectories of primary beams with different
DBr/ Brbeam
Target
Beam Dumps
Light fragments
The primary beam is always dumped in well-defined
positions outside the magnets !
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Exploration of radiation load on magnets behind
the high-power production target
Projectile 1500 MeV/u 238U 1012/s sx
1.0 mm sy 2.0 mm sp /p 0.5
Energy deposition distribution (calculated with
PHITS)
Target Carbon 4 g/cm2
Geometry
Avarage energy depositionon on the coil surface
ltDEgt/M 0.46 mJ/g (quench limit 2-3
mJ/g) Heat load on the cryogenic system for a 5
ton quadrupole magnet Expected FAIR cryogenic
power 20 kW
2.3 kW
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Exploration of radiation load on magnets behind
the beam dumps

Projectile 1500 MeV/u 238U 1012/s
sp/p 0.5 sy
1.0 cm sx 4.0 cm
(ltDEgt/M)coil 0.3 mJ/g limit 2-3 mJ/g
(ltDEgt/M)coil 0.76 mJ/g limit 2-3 mJ/g
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Radiation sensitivity of coil materials and
insulator
Behind target and beam dump Expected heat
load 1 mJ/g
? is equivalent to a
dose rate of 1 Gy/s
Assume 4000 h/year operation time ? 14 MGy
accumulated dose
? Ceramic
insulation is required
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Radiation resistant (normal-conducting) magnet
Magnet Cross Section
Parameter B 1.6 T I 600
A J 1.5 A/mm2 P 50 kW ?B/B
210-4 ?R 20 cm Weights (12.5 m, 11)
Fe 72 t Cu 9.5 t
Coil Cross Section
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Conceptual design of a high-precision Survey and
Alignment System for high-radiation areas of FAIR
After commissioning of the SuperFRS a very high
level of radiation is expected. SA "as usual"
will not be possible due to prohibited or limited
access.
No access of human personnel High demands on
accuracy (some 1/10 of mm) Handling curved
beamlines with a length up to 50 m
"RALF" - Remote ALignment on the Fly Based on
Photogrammetry non-contact high accuracy data
capture within a short time Automated guided
vehicle system Remotely controlled adjustment of
accelerator components
in cooperation with i3mainz Institute for Spatial
Information and Surveying Technology
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Multi-annual implementation plan for NUSTAR2
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Participating institutes in task7 (NUSTAR2)
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Milestones and Deliverables of NUSTAR2

• Milestones
• M7-1 Decision on insulating material, 10/2005
• M7-2 Delivery of model coil, 9/2006
• M7-3 Design and test for Surveying and
  alignment system
• finished, 4/2007
• M7-4 Prototype Magnet delivered, 12/2007

• Deliverables
• D13 Report on exploration of conductor and
  cable, 1/2006
• D14 Report on the model coil, 1/2007
• D15 Report on surveying and alignment system
  for high-
• radiation areas, 7/2007
• D16 Report on design and construction of the
  prototype
• magnet, 12/2007

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Summary of Project Resources and Budget of the
DP NUSTAR
The requested 589 k from the EU correspond to
41 of the overall EU request for the DP NUSTAR