Patent ID: 7514928

Claim:
A superconducting magnet configuration for a magnetic resonance apparatus, the configuration comprising: a substantially cylindrical magnet coil having a magnet winding of superconducting wire for generating a magnetic field B in a working volume and defining a room temperature bore, which is coaxial relative to said magnet coil, and which contains said working volume; and several electrically conducting oscillation systems, disposed radially inside said magnet winding, each of said oscillation systems having a uniform oscillation behavior and oscillating relative to each of other said oscillation systems, each oscillation system being substantially tubular and disposed coaxially to said room temperature bore, wherein each oscillation system has an electrical conductivity value p=σ*d with p>1*10 2 /Ohm at room temperature, with σ being an electric conductivity of said oscillation system and d being a minimum wall thickness of said oscillation system in a radial direction, each oscillation system also having a characteristic mechanical value q=E/ρ, wherein E is an average modulus of elasticity of said oscillation system and ρ is an average density of said oscillation system, wherein at least one of said oscillation systems is a low temperature oscillation system having an operation temperature of T<10K and at least one of said oscillation system is a warm oscillation system having an operation temperature of T 2 >10K, wherein all warm oscillation systems are disposed radially inside said at least one low temperature oscillation system, all low temperature oscillation systems having electrical conductivity values p 1 =σ 1 *d 1 with p 1 >1*10 6 /ohm at a respective temperature T 1 , wherein at least one warm oscillation system has an electrical conductivity value p 2 =σ 2 *d 2 with 1*10 2 /ohm<p 2 <1*10 6 /ohm at an associated temperature T 2 , wherein a characteristic mechanical value q 2 of this at least one warm oscillation system differs from a characteristic mechanical value q 1 of said at least one low temperature oscillation system by at least a factor of 1.5.