RAL High Power Targets Group

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RAL High Power Targets Group
Chris Densham, Otto Caretta, Tristan Davenne,
Mike Fitton, Peter Loveridge, Dan Wilcox Joe
ODell (PEG)
Mission

• To be a one-stop shop (P. Hurh) for target
  technology
• Enable optimum physics performance via sound
  engineering

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Specific technical expertise

• Mechanical thermal engineering
• From conceptual detailed design through to
  manufacture, installation commissioning
• FLUKA (MonteCarlo code)
• energy deposited in target components by the beam
• optimisation of useful particle yield
• CFX (fluid dynamics code)
• Cooling circuit design
• conjugate heat transfer analysis
• ANSYS classic (Implicit FEA)
• magnetic, thermal, mechanical analyses
• multiphysics simulations
• AUTODYN (Explicit FEA)
• dynamic simulations
• Transient dynamic analysis
• Multi-code integration
• Specialist joining technology
• Fluidised powder technology

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Multi-code integration for physics engineering
analysis

• Analysis procedure for LBNE target/horn

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MatLab Interface Developed In-House

• FLUKA post-processing GUI developed in-house
• Reads the FLUKA output file
• Writes out the energy deposition data in a
  suitable format for CFX, ANSYS, AUTODYN
• Semi-automated process permits multiple case runs

CFX fluid dynamics code for conjugate heat
transfer
ANSYS multi-physics simulation
FLUKAenergy deposition
MatLABsemi-automated interface
AUTODYN dynamic simulation
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T2K Secondary Beam-line
Hadron absorber
Target station
Beam window
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T2K Secondary Beam-line
Hadron absorber
Target station
Beam window
Baffle
Target
1st horn
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T2K Target

• Helium cooled graphite rod
• Design beam power 750 kW
• Beam power so far 230 kW
• 1st target still running after 4 years

p
p
Acoustic stress waves in target after off-centre
beam spill
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T2K Target

• Helium cooled graphite rod
• Design beam power 750 kW
• Beam power so far 230 kW
• 1st target still running after 4 years

p
p
Prototype graphite to titanium bonding
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T2K Target

• Helium cooled graphite rod
• Design beam power 750 kW
• Beam power so far 230 kW
• 1st target still running after 4 years

p
p
400 m/s
Helium flow lines
Mike Fitton
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T2K Target

• Helium cooled graphite rod
• Design beam power 750 kW
• Beam power so far 230 kW
• 1st target still running after 4 years

p
p
Prototype graphite to titanium bonding
400 m/s
Inserting target into magnetic horn
Helium flow lines
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Exploring limits of static, solid targetsDesign
studies for Fermilab (LBNE) EUROnu collaboration
100 m/s
4 MW Neutrino Superbeam study (EUROnu) Packed
Bed Target Solution
Velocity vectors showing inlet and outlet
channels and entry and exit from packed bed
Tristan Davenne
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Multi-MW target solution fluidised tungsten
powder research
Open jet
Contained discontinuous dense phase
Contained continuous dense phase
1. Suction / Lift 2. Load Hopper 3. Pressurise
Hopper 4. Powder Ejection and Observation
Otto Caretta Peter Loveridge
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ISIS Capabilities

• David Jenkins
• ISIS Target Design Group Leader
• 3rd April 2013

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• Knowledge and expertise in our people
• ISIS Target Design Group
• Group of 10 mechanical engineers who
• Support the work of the ISIS Target Operations
  Group
• Design and develop new systems and equipment for
  ISIS target operations.

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• Target station operation experience

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• ISIS First Target Station
• In operation for 27 years
• Current target 12 tungsten plates clad in
  tantalum
• Typically 180mA of 800MeV protons
• Maximum power density 1000MW/m3
• Peak energy per pulse 25MJ/m3/pulse

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View of the ISIS TS1 TargetReflectorAndModerators.

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• ISIS Intermediate Target Station
• Muon production target in operation since early
  1990s
• 800MeV protons interact with 10mm thick graphite
  blade
• Graphite blade set at 45o angle to beam
• Target cooled by water
• Target cassette holds three individual graphite
  targets

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• ISIS Second Target Station
• In operation for 4 years
• Target - tungsten cylinder clad in tantalum
• Typically 45mA of 800MeV protons
• Maximum power density 1000MW/m3
• Peak energy per pulse 100MJ/m3/pulse.

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View of the ISIS TS2 TargetReflectorAndModerators
with the edge cooled beryllium reflector
partially open to reveal the target and cryogenic
moderators.
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The ISIS TS2 TRAM with the reflector open in
maintenance mode and the target and cryogenic
moderators revealed.
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• Spallation Neutron Source facilities design and
  build experience

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Target Stations
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Design, build and operation of Hot Cells
Remote Handling cells and lead glass shielding
windows
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• Target Manufacturing and Assembly
• Precision machining
• Machining Tungsten and Tantalum
• EDM
• 5 axis CNC
• EB welding of Tantalum cladding and bulk tantalum
• Hot Isostatic Pressing of Tantalum cladding
• Target assembly

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ISIS TS1 target under construction
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• Engineering analysis
• Proton beam target interaction modelling
• Thermo-mechanical stress/strain - FEA
• Cooling water flow analysis CFD
• Heat transfer CHF - BO

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• Investigation of strain/stress state of target
  cladding using neutron diffraction
• ISIS director approval for access to Engin-X
  instrument.

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• ISIS First Target Station upgrade plans
• Currently in a definition (feasibility) phase
  reviewing the options for an upgrade which might
  include
• An improvement in efficiency
• An improvement in reliability
• An improvement in specific output
• Or a combination of all three.
• The existing target station infrastructure will
  have a strong influence on any upgrade path.

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• ISIS Second Target Station upgrade plans
• Currently in the middle of the phase II
  instruments project
• Adding a further 4 instruments to the current
  suite of 7
• An improvement in flexibility of the beryllium
  reflector
• To accommodate potential future changes to the
  moderators
• Potential changes to the instrument suite.
• Again, existing target station infrastructure
  will have a strong influence on any upgrade path.