Magnetic probe device

A magnetic probe device, comprising:

• a magnetic probe body;
• and
• a signal processing circuit;
• an output end of the magnetic probe body is connected with an input end of the signal processing circuit;
• the signal processing circuit comprises a first capacitor, a second capacitor, a Faraday shield and a step-up transformer;
• the Faraday shield is fixedly arranged between a primary winding and a secondary winding of the step-up transformer;
• a center tap is arranged at the primary winding of the step-up transformer, and the center tap is grounded;
• and
• a first end of the primary winding is in series connection with the first capacitor, and a second end of the primary winding is in series connection with the second capacitor;
• wherein, the magnetic probe body comprises a probe head, a first coaxial cable, a second coaxial cable and a quartz tube;
• the first coaxial cable and the second coaxial cable are arranged in parallel, the first coaxial cable and the second coaxial cable are exteriorly and integrally coated with an aluminum foil, and the first coaxial cable and the second coaxial cable, which are coated with the aluminum foil, are inserted to and fixed in an interior of the quartz tube;
• the probe head is formed by a two-turn coil;
• a first end of the probe head is connected with a first end of the first coaxial cable, and a second end of the probe head is connected with a first end of the second coaxial cable;
• a second end of the first coaxial cable is connected with the first end of the primary winding of the step-up transformer;
• and,
• a second end of the second coaxial cable is connected with the second end of the primary winding of the step-up transformer.