Persistent-mode operation and magnetization behavior of a solid-nitrogen-cooled MgB2small-scale test coil towards a tabletop 1.5-T osteoporosis MRI
<|begin_of_text|><|start_header_id|>system<|end_header_id|> You are a research archivist expert in dataset metadata. Answer the question truthfully.  <|eot_id|><|start_header_id|>user<|end_header_id|> Here is the Description of a dataset. Description:'We present results—cooldown, energization, and persistent-mode operation—of a solid nitrogen (SN2)-cooled, magnesium diboride (MgB2) small-scale test coil. The test coil, immersed in a volume of solid nitrogen at 6 K, successfully operated in persistent-mode at 108 A for a period of 5 days. Although designated a “persistent-mode” coil, its center field was measured to decay at a rate of < 0.6 ppm·h-1, which is still considered low enough to meet the temporal stability requirement for most magnetic resonance imaging magnets. This decay rate translates to a calculated circuit resistance of < 1.79 × 10-12 Ω, which is mainly from one MgB2-MgB2 joint in the circuit. However, when the coil temperature increased from 6 to 16 K, the field had dropped by 0.33%: we believe this was caused by the change of magnetization in the MgB2 superconductor,' . Please return only a json list of at most 3 Keywords corresponding to the Description:.<|eot_id|><|start_header_id|>assistant<|end_header_id|> {"Answer" : ["circuit resistance","density redistribution","magnesium diborides","magnetization behavior","MgB2 superconductor","Solid nitrogens (SN2)","temperature cycles","temporal stability"]} <|eot_id|>
 Here is the Description of a dataset. Description:'We present results—cooldown, energization, and persistent-mode operation—of a solid nitrogen (SN2)-cooled, magnesium diboride (MgB2) small-scale test coil. The test coil, immersed in a volume of solid nitrogen at 6 K, successfully operated in persistent-mode at 108 A for a period of 5 days. Although designated a “persistent-mode” coil, its center field was measured to decay at a rate of < 0.6 ppm·h-1, which is still considered low enough to meet the temporal stability requirement for most magnetic resonance imaging magnets. This decay rate translates to a calculated circuit resistance of < 1.79 × 10-12 Ω, which is mainly from one MgB2-MgB2 joint in the circuit. However, when the coil temperature increased from 6 to 16 K, the field had dropped by 0.33%: we believe this was caused by the change of magnetization in the MgB2 superconductor,' . Please return only a json list of at most 3 Keywords corresponding to the Description:.
We present results—cooldown, energization, and persistent-mode operation—of a solid nitrogen (SN2)-cooled, magnesium diboride (MgB2) small-scale test coil. The test coil, immersed in a volume of solid nitrogen at 6 K, successfully operated in persistent-mode at 108 A for a period of 5 days. Although designated a “persistent-mode” coil, its center field was measured to decay at a rate of < 0.6 ppm·h-1, which is still considered low enough to meet the temporal stability requirement for most magnetic resonance imaging magnets. This decay rate translates to a calculated circuit resistance of < 1.79 × 10-12 Ω, which is mainly from one MgB2-MgB2 joint in the circuit. However, when the coil temperature increased from 6 to 16 K, the field had dropped by 0.33%: we believe this was caused by the change of magnetization in the MgB2 superconductor,
circuit resistance; density redistribution; magnesium diborides; magnetization behavior; MgB2 superconductor; Solid nitrogens (SN2); temperature cycles; temporal stability