Transcript Neutrino Factory Target Vessel Concept Update V. Graves T. Lessard Target Studies EVO June 26, 2012

Neutrino Factory
Target Vessel
Concept Update
V. Graves
T. Lessard
Target Studies EVO
June 26, 2012
Review – Last Week’s Concept
Downstream
Beam Window
Inner
Tungsten
Shield
Double wall mercury containment
inside tungsten shielding chambers
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Mercury Pool
Target Vessel Update 26 June 2012
Review - Mercury Module Extraction
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Target Vessel Update 26 June 2012
Review - Cryostat Modules
Outer
Tungsten
Module
Inner
Tungsten
Module
Mercury
Module
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Target Vessel Update 26 June 2012
New Concept – Changed Shape of
Mercury Module
• Outer sleeve now
bell-shaped to
match inner Hg
chamber
• Combined inner &
outer tungsten
shield modules
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Target Vessel Update 26 June 2012
Cooling Channel Within Shielding
Module
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Target Vessel Update 26 June 2012
Mercury Module Comparison
• Increased inner chamber
size, simpler geometry
• Added segment vanes
throughout interstitial
space
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Target Vessel Update 26 June 2012
Beam Entrance Pipe Complicates
Interior
• Beam enters from side, passes
through interior vane in this concept
• Number and location of vanes TBD,
but this issue will worsen if
additional beams incorporated
Beam
Entrance Pipe
Opening
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Target Vessel Update 26 June 2012
Upstream End of Mercury Chamber
Beam
Entrance Pipe
Opening
Mercury
Nozzle
Opening
Mercury
Drain
Openings
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Target Vessel Update 26 June 2012
Current Mercury Module
• Requires more mercury than before
• Top no longer matches beam pipe taper
• Provides room for additional side shielding
• Bottom slope incorporated in both walls for
draining
• Downstream end can be shortened, assuming
the window cooling is adequate
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Target Vessel Update 26 June 2012
Remote Handling Features
Incorporated
• Consideration given towards installing mercury module inside
shielding module
• Accurate, repeatable final positioning required
• Assumes cryostat and shielding module are accurately located
• Added 2.5cm open space around mercury module (increased size
of hole in shielding module)
• Incorporates “rough” and “precision” guides
• Adds features to both the mercury and the tungsten modules
• Assumes a handling cart/mechanism with minor vertical motion
capability
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Target Vessel Update 26 June 2012
Initial Guide Concept
Rough Guides
Module Support Pads
Precise Guides
Mercury Weight
Support Pad
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Target Vessel Update 26 June 2012
Summary
• Mercury Module now provides double-wall mercury containment with no leak
path into tungsten cooling channels
• Module is independent, requires its own helium cooling capability
• No consideration yet for structural and/or cooling issues
• Initial look into schemes for precision location of module within tungsten
shielding
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Target Vessel Update 26 June 2012