Patent ID: 8761345
Filing Date: 2014-06-24
Classification: H01J

Abstract:
1. An X-ray tube, comprising: a cathode to emit electrons; an anode target to emit X-rays by incident electrons emitted from the cathode; a vacuum envelope housing the cathode and the anode target, the vacuum envelope including: an adapter placed so as to be in contact with the first metal member, and surrounding the second metal member outside the vacuum envelope, and having a thermal conductivity higher than that of the second metal member; a heat-transfer medium placed between the ceramic member and the adapter, outside the vacuum envelope; and a cooling system connected to the first metal member and forming a cooling passage through which coolant flows, wherein heat released from the anode target is conducted to the cooling system directly or indirectly via the first metal member, and heat released from the cathode is conducted to the cooling system indirectly via the ceramic member, the heat-transfer medium, the adapter, and the first metal member.