A Mini Excavator is a small construction machine used for digging and digging tasks. It is also commonly known as a compact excavator or a mini excavator.Nuoman mini excavators typically weigh from 0.8 to 6 tonnes and are designed to be flexible and versatile for use in tight spaces and urban environments. They are equipped with a hydraulic system that powers the digging arm and bucket attachments.Mini excavators are commonly used in a variety of construction projects such as landscaping, trenching, digging foundations, demolition and utility work. They can be operated by one person and are commonly used in residential, commercial and industrial settings.Some of the key features of a mini excavator include a rotating platform for 360-degree movement, rubber or steel tracks for stability and traction, and a variety of bucket attachments for different digging and lifting tasks. They also come with a cab or canopy for operator safety and comfort. Mini Excavators,Excavators,Excavator manufacturers,Diesel Excavator,Electric Excavator Shandong Nuoman Engineering Machinery Co., Ltd , https://www.chinanuoman.com
Physics, etc. use a strong laser to greatly increase the terahertz pulse energy
[ China Instrument Network Instrument Development ] Terahertz (THz) radiation lies between the mid-infrared and microwave regions of the electromagnetic spectrum. Due to its unique single-photon energy and spectral "fingerprint," it offers significant advantages in fields such as materials science, biomedical research, and national security. However, the development of terahertz technology has been hindered by the lack of high-energy terahertz sources. Various electronic and optical methods have been explored to generate THz radiation, but so far, the highest reported pulse energy remains below one millijoule.
Comparison of terahertz peak power obtained by different methods
A research team led by Li Yutong from the Institute of Physics, Chinese Academy of Sciences, and the Beijing National Center for Condensed Matter Physics, in collaboration with Zhang Jie and Liao Guoqian from Shanghai Jiaotong University, has developed a novel method to generate terahertz radiation through strong laser-solid target interactions. In earlier studies, they used laser-accelerated electrons to excite terahertz radiation [Phys. Rev. Lett. 116, 205003 (2016)]. Recently, they worked with David Ruelow from the Rutherford Laboratory in the UK to significantly enhance the terahertz pulse energy.
The experiment was conducted at the Vulcan laser facility at the Rutherford Laboratory, with the experimental design proposed by the Chinese team. Using a picosecond super-laser system, they first accelerated a large number of high-energy electrons within a solid thin film target. When these electrons exited the back of the target into vacuum, they generated intense terahertz radiation. The results showed that the terahertz pulse energy reached up to 50 mJ, marking the highest energy achieved in laboratory settings so far.
Terahertz radiation is already widely used in various applications, including full-body scanners at airport security checkpoints. This breakthrough in generating powerful terahertz sources using high-power lasers opens new possibilities for studying the nonlinear dynamics of matter.
The findings were recently published in the Proceedings of the National Academy of Sciences (PNAS). The research was supported by several funding agencies, including the National Natural Science Foundation of China, the Chinese Academy of Sciences, the Ministry of Science and Technology, and the Newton Fund.
(Original title: Physics, etc. use a strong laser to greatly increase the terahertz pulse energy)