DIAGNOSING METHOD AND APPARATUS FOR SPALLATION NEUTRON SOURCE MERCURY TARGET CONTAINER

• Main Authors: FUTAGAWA MASATOSHI, TESHIGAWARA MAKOTO, IKEDA YUJIRO, SOYAMA HITOSHI, KONAKAWA HIROYUKI, YOSHIDA NOBUTOSHI
• Format: Patent
• Language: English
• Published: 30.03.2006
• Subjects: ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GAMMA RAY OR X-RAY MICROSCOPES; IRRADIATION DEVICES; MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES; MEASURING; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PHYSICS; PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OFNEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMICBEAMS; TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOTOTHERWISE PROVIDED FOR; TESTING

PROBLEM TO BE SOLVED: To provide a diagnosing technology for a spallation neutron source mercury target container capable of executing evaluation of damage and evaluation of deterioration due to fatigue of the mercury target container by precisely measuring an outer circumferential vibration of the spallation neutron source mercury target container installed inside (on the bottom of) a large-sized structure for producing neutrons in noncontact without being influenced by radiation from outside the structure. SOLUTION: The diagnosing technology comprises the steps of projecting, from a laser Doppler vibration meter, an incident beam onto the spallation neutron source mercury target container irradiated with a pulse incident proton beam for producing neutrons, receiving the reflection beam, acquiring a measurement signal and evaluating the damage and deterioration due to fatigue of the mercury target container on the basis of a specific characteristic of the measurement signal. COPYRIGHT: (C)2006,JPO&NCIPI