Transcript Neutrino Factory Target Vessel Concepts Updated 4/16/12 V. Graves Target Studies EVO April 11, 2012 Target Vessel Requirements • Accurate jet placement • Jet/beam dump pool • Double containment.

Neutrino Factory
Target Vessel
Concepts
Updated 4/16/12
V. Graves
Target Studies EVO
April 11, 2012
Target Vessel Requirements
• Accurate jet placement
• Jet/beam dump pool
• Double containment of mercury
• Beam entrance port(s)
• Chamber ventilation
• Provisions for cooling
• Provisions for draining
• Additional SC coil shielding
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Target Vessel Concept 16 Apr 2012
Starting Point: Integrated with
Resistive Magnets
• Goal: develop concept with no resistive magnets
• Method: start with solid cylinder of SS and remove
material as required
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Cylinder
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Target Vessel Concept 16 Apr 2012
Jet/Beam Chamber
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Target Vessel Concept 16 Apr 2012
Nozzle
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Target Vessel Concept 16 Apr 2012
Beam Pipe
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Target Vessel Concept 16 Apr 2012
Mercury Pool Trough
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Drains
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Vents
Vent
Entrance
Vent
Exit
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Target Vessel Concept 16 Apr 2012
Downstream End Cap
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Double Wall
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Beam Window
• Could add flow channels to interstitial space for water or helium cooling
• Beam window becomes integral part of assembly
• Be/SS interface TBD
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Cooling Channels
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Comments
• These images were created to aid in discussion. No
specific fabrication details were included.
• A machined billet will be more precise, rigid, and more
accurately place the nozzle than a welded shell filled
with tungsten beads.
• This concept still has numerous issues to be worked
out. For instance, all fluid passages must be selfdraining.
• Space on the upstream end is still a major concern. The
small beam/jet angles cause significant mechanical
issues.
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Target Vessel Concept 16 Apr 2012
Tungsten Shielded Version
• Develop concept for welded vessel filled with tungsten beads
• Start shielded portion at Z=nozzle, replace bored holes with pipes
• Initial geometry similar to earlier concept, but shorter. Assumed Stainless
Steel.
Nozzle Entrance
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Reconsider Interior Profile
• Clean up jagged edges, abrupt transition
• Match beam pipe but allow for wider pool
Beam Pipe Profile
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Mercury Vessel Profiles
• Vessel profile matches beam pipe only at the top. Shielding ability not
symmetric around magnetic axis.
• Vessel profile expands in width & depth for pool. Shapes can be varied slightly.
Nozzle Profile & Beam Pipe
Transition Beam Pipe
Transition Profiles
Exit Beam Pipe
Exit Profile
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Enlarged Profiles
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Shell Geometry
• Start of deviation from earlier, solid concept
• Create region for tungsten shielding
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Add End Cap for Beam Window
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Add Tungsten
• Helium- or water-cooled beads
– Would include multiple sectors for inlets/outlets
– Water cooling requires slopes for drainage
• Tungsten not axi-symmetric
• Structural supports required
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Double Containment Shell
• Interior module requires rigid confinement within
exterior shell
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Add End Cap and Beam Window
• Hollow beam window for double-wall mercury confinement
– Be/SS interface
• Could fill interstitial with water or helium for additional cooling
(beam window requires cooling)
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Nozzle Piping
• Extends between vessels
– Double pipe required outside secondary vessel
– Upstream length determined by handling considerations
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Drain Piping in a Similar Fashion
• Other pipes needed for beam(s), cooling, vents
• This becomes a single module for RH
• Flanged connections to external services
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Comments
• Welded structure less precise than earlier, machined module
– Could affect nozzle accuracy
– Tungsten/mercury weight requires significant support structure
– Target module location determined by guides/features inside SC shielding
module
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Target Vessel Concept 16 Apr 2012