Table 1 HERA dipole properties
From: Straightening of superconducting HERA dipoles for the any-light-particle-search experiment ALPS II
Property | Value | Unit |
|---|---|---|
Total length vacuum vessel | 9766 | mm |
Length of Helium vessel | 9216 | mm |
Length cold mass | 8852 | mm |
Diameter of vacuum vessel | 610 | mm |
Diameter of Helium vessel | 400 | mm |
Diameter of radiation shield | 510 | mm |
Inner diameter of coil | 75 | mm |
Inner diameter of beam pipe | 55.3 | mm |
Wall thickness of beam pipe | 2.5 | mm |
Material beam pipe: nonmagnetic stainless steel | 316LN | Â |
Length of beam pipe | 9582 | mm |
Radius of curvature of coil and beam pipe | 585 | m |
Deviation from straight line in middle of magnet | 16.65 | mm |
Magnetic length (Italian dipole) | 8825.7 | mm |
RMS deviation magnetic length | ±1.7 | mm |
B·L 5.3·8.8257 | 56.8 | Tm |
RMS Field error | ≈10−4 |  |
RMS angular deviation from gravity | ±0.15 | mrad |
Nominal operating current ALPS | 5693 | A |
Corresponding magnetic field | 5.3 | T |
Quench current average HERA | 6353 | A |
Quench detection voltage at test bench | 500 | mV |
Inductance | 0.058 | Henry |
Stored energy | 572 | kJoule |
Static losses at 4 K | 5,5 | Watt |
Static losses at 70 K | 25 | Watt |