Muon Accelerator Program (MAP)

U.S. Department of Energy

Muon Accelerator Program Document 4326-v1

Shielding of Superconducting Coils for a 4-MW Muon Collider Target System

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Harold G Kirk
Updated by:
Harold G Kirk
Document Created:
17 May 2012, 09:32
Contents Revised:
17 May 2012, 09:32
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17 May 2012, 09:32
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The target system envisioned for a Muon Collider/
Neutrino Factory [1] features a liquid Hg jet target
immersed in a 20-T solenoidal field. Field quality limits
intercoil gaps to ≈ 40% of the O.D. of the flanking coils.
Longitudinal sag of the tungsten shielding vessels limits
their length to ≈ 7 m. Support members adequate to resist
intercryostat axial forces require an aggregate cross section of ≈ 0.1 m2; the cryogenic heat leakage may be large. The innermost shielding vessel wall can be adequately cooled by heliumgas only if its pressure is ≈ 10 atm and its velocity is ≈ 200 m/s. However, the analysis in this paper found none of these engineering challenges to be insurmountable.
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shielding target system
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