The Study of Mechanical Behaviors of Horn Sheath under Pendulum Impact.

As a light-weight natural keratin biocomposite, horn exhibits high mechanical properties and energy absorption. Different to the widely studied horn from subfamily and , few studies have focused on the horn sheath of subfamily . In this work, three horn sheathes from Cashmere goat, White goat and Black sheep were selected.

Focusing of intense and divergent ion beams in a magnetic mass analyzer.

A magnetic mass analyzer is used to determine the beam composition of a vacuum arc ion source. In the analyzer, we used the concentric multi-ring electrodes to focus the intense and divergent ion beams. We describe the principle, design, and the test results of the focusing device.