Application Field

Nuclear Physics

Field Introduction

Neutrons are ideal probes for studying the structure and dynamics of matter, and neutron scattering techniques have been widely used in many basic disciplines. A neutron source is a device capable of generating neutrons, and is an essential device for neutron physics experiments such as nuclear reactions and neutron diffraction.

The emergence of spallation sources has broken through the limit of neutron flux in reactor sources. Developed countries are taking the construction of high-performance spallation sources as an important measure to improve their scientific and technological innovation capabilities. In material science, a spallation source can study the reaction laws of hydrogen storage materials and batteries, provide more accurate phase identification for composite materials, develop ferroelectric, piezoelectric materials and new magnetic materials, and guide material processing technology through non-surface deep CT scanning.

Tungsten is a refractory material with a high melting point and high thermal conductivity. It has become the preferred material for plasma in current nuclear fusion devices due to its low sputtering rate, low fuel retention and low neutron activation. The application of tungsten in nuclear fusion reactors has been studied and reported in many scientific papers and other literature. In addition to its application in nuclear fusion reactions, tungsten also plays a key role in spallation source devices.  






The tungsten target is the core component of the neutron spallation source and the source of neutrons. The performance of the tungsten target determines the overall stability and reliability of the neutron spallation source system and the efficiency of the neutron source. It needs to meet high-power operating requirements, be upgradeable, and meet all requirements for long-term service under high-temperature thermal cycle stress in the neutron spallation source device.

To obtain high-performance tungsten targets, ATTL has innovatively developed tungsten plate preparation processes, improved densification processes and optimized deformation systems. Its tungsten targets offer the following advantages:

■   Good erosion and corrosion resistance.

■    Efficient removal of heat generated within the target body.

■     Stable Young's modulus, mechanical strength and other properties. 

■    High density, uniform performance, good fatigue performance, and extremely high thermal shock resistance.

ATTL tungsten targets have been successfully used in Chinese and European neutron spallation sources.