摘要:
A probe coil for an NMR apparatus including a superconductor coil formed from a superconductor made of magnesium 2-boride formed on the surface of a substrate, and a coil bobbin around which the superconductor coil is wound, wherein the substrate is made of a material that contains no hydrogen atoms.
摘要:
A magnet for an NMR analyzer includes a superconductor coil for generating a magnetic field in a magnetic space surrounded by the superconductor coil. The superconductor coil has a shim coil group disposed at least one of inside and outside of the superconducting coil. The superconducting coil provides a first access port for receiving a probe inserted into the magnetic space along a central axis thereof and a second access port having one end for receiving a sample tube containing a sample inserted into the magnetic space in a direction transverse to the central axis of the magnetic space. The second access port is open at an other end thereof.
摘要:
An NMR apparatus which includes an NMR probe coil of a superconductor made of magnesium 2-boride formed on the surface of a substrate made of a flexible organic polymer material.
摘要:
A NMR apparatus includes a probe coil of a superconductor coil made of magnesium 2-boride formed on a surface of a substrate, and a coil bobbin around which the superconductor coil is wound. The substrate is made of a flexible organic material that contains no hydrogen atoms.
摘要:
An NMR apparatus which includes an NMR probe coil of a superconductor made of magnesium 2-boride formed on the surface of a substrate made of a flexible organic polymer material.
摘要:
A probe coil for an NMR apparatus including a superconductor coil formed form a superconductor made of magnesium 2-boride formed on the surface of a substrate, and a coil bobbin around which the superconductor coil is wound, wherein the substrate is made of a material that contains no hydrogen atoms.
摘要:
A configuration of an NMR apparatus is provided. In the NMR apparatus, a magnetic field space of higher uniformity is generated by split superconducting magnets. At the same time, it is provided with a cryo probe excellent in cooling capability and sensitivity between two superconducting solenoid coils constructed in very close proximity to each other. For this purpose, a probe coil provided between the two superconducting solenoid coils is so constructed that the following is implemented: a certain distance is ensured between a substrate with a coil formed thereon and another, and the substrates and spacer substrates for cooling are alternately laminated. The spacer substrates are cooled by a cold head of sapphire. When the probe coil is inserted in the same direction as a sample tube (direction perpendicular to the static magnetic field), the spacer substrates cannot be coupled directly by the cold head of sapphire. Therefore, they are cooled through a fixed substrate for thermal conduction of sapphire coupled with the cold head.
摘要:
The present invention provides a superconductivity magnet apparatus for generating a uniform magnetic field suitable for NMR applications. The superconductivity magnet apparatus has an access port for allowing an access to the center of the magnetic field from an external position separated away from the center in a direction other than the axial direction of a split-type superconductivity electromagnet employed in the magnet apparatus. In the superconductivity magnet apparatus, a gap exists between first and second superconductivity coil blocks facing each other to form the split-type superconductivity electromagnet. To put it in detail, the access port allows an access to a measurement space at the center of the magnet by way of the gap. A configuration element of the magnet such as a coil bobbin is cut out for providing the access port. An area including a deficiency portion caused by the cutout portion or the like is filled up with a material having a relative magnetic permeability in the range 1.000 to 1.002 as an axis-symmetrical area. By using the material with a relative magnetic permeability in the range 1.000 to 1.002, the strength of an erroneously generated magnetic field can be reduced so that a magnet producing a uniform magnetic field can be provided.
摘要:
The invention provides a low temperature probe having a high sensitivity by reducing a heat intrusion into a receive coil. A heat making an intrusion into a coil is suppressed by inserting a heat radiation shield in which a temperature is controlled at about 100 K to a portion between an outer container of a probe and a coil portion. A heat radiation shield bore sleeve is provided in a heat radiation bore, is connected to the heat radiation shield, and is cooled by a second heat exchanger. Further, the coil portion is cooled by a first heat exchanger. In preparation for a contraction at a time of being cooled, the outer container, the heat radiation shield and the coil portion are connected by using a fixing portion, and a heat relieving mechanism or a contraction relieving mechanism is provided in a root side (an opposite side to the fixing portion) of the heat radiation shield and the coil portion. The fixing portion is formed in a shape and made of a material having a small heat intrusion amount and having a small heat contraction.
摘要:
The cross section of a wire is round and is composed of several units, each consisting of tape-like superconductors laminated in an approximately rhombic shape, which are arranged such that they form a hexagon as a whole. Oxide superconducting tape wires each consisting of a plurality of oxide superconducting filaments are arranged in rotational symmetry to a core. The oxide superconducting filaments have the cross section such that the average thickness is 3 to 20 &mgr;m and the average aspect ratio is larger than 2 and smaller than 10. A step of arranging the oxide superconducting tape-like wires in rotational symmetry is accomplished when the multi-core tape-like wires are packed in a third metal pipe which becomes a metal sheath later. Since the multi-core tape wires having oxide superconducting filaments are arranged in rotational symmetry, the oxide superconductor in the oxide superconducting filaments permits its c axis to orient in various directions. This makes it possible to prevent the critical current from decreasing irrespective of the direction in which the magnetic field is applied and to increase the critical current density (Jc) because the oxide superconducting filament has an optimal size. The oxide superconductor should be a bismuth-based oxide superconductor, preferably be the one which has a composition of Bi2Sr2Ca1Cu2Ox.
摘要翻译:线的横截面是圆形的,并且由几个单元组成,每个单元由以大致菱形形式叠层的带状超导体组成,它们整体形成六边形。 每个由多个氧化物超导细丝组成的氧化物超导带线布置成与芯部旋转对称。 氧化物超导细丝具有平均厚度为3-20μm,平均纵横比大于2且小于10的横截面。当将氧化物超导带状导线布置成旋转对称的步骤是在 多芯带状电线被包装在稍后成为金属护套的第三金属管中。 由于具有氧化物超导细丝的多芯带线布置成旋转对称,所以氧化物超导细丝中的氧化物超导体允许其c轴在各个方向上取向。 这使得可以防止临界电流随着施加磁场的方向而降低,并且由于氧化物超导细丝具有最佳尺寸而增加临界电流密度(Jc)。 氧化物超导体应为铋基氧化物超导体,优选为具有Bi 2 Sr 2 Ca 1 Cu 2 x x x的组成的超导体。