Nuclear magnetic resonance ime - jingu device

摘要

PURPOSE:To improve non-magnetic performance and heat conductivity or element members which compose heaters and to shorten a temperature rise time of a magnetic circuit, by using non-magnetic planar heat generators to compose start-up heaters and making both sides of the heaters covered with insulating materials and fixing their heaters on the surface of a magnetic circuit yoke. CONSTITUTION:Each magnetic pole piece 2 for use in uniform magnetic field formation is disposed on a flat plate type permanent magnet 1. Two laminates, each one of which is composed of the permanent magnet 1 and the magnetic pole piece 2, are prepared to interpose a measured space therebetween, where a matter to be inspected is inserted, and they are disposed to face each other on the upper and lower sides. Further one-sided parts of respective upper and lower permanent magnets are fixed close to yoke plates 3. The upper and lower yoke plates 3 are coupled magnetically and structurally with yoke bars 4. An aluminum plate 8 is stuck inside a heat-resisting part 6, and besides a heater 7 covered with an insulator for use in temperature regulation is stuck inside the aluminum plate 8. Start-up heaters 20 are stuck two by two on the upper yoke plate and the lower one, respectively. Hence, a good image can be obtained without disturbance in uniformity of a static magnetic field, and also a time in which a temperature rises up to a preset one can be reduced to shorten the installation period of this device.