The rail gun is an electromagnetic device that converts electrical energy into mechanical energy for accelerating the projectile to hypervelocity. In order to accelerate the projectile between the conducting rails, it uses the magnetic field generated by the rail current. The rail gun consists of two parallel conductors called the rails that are bridged by a non-ferromagnetic conductor called a...

An electron gun for a high-power electron linac in the Japan nuclear cycle development institute (JNC) has been developed and tested. In this electron gun, two types of grid control systems (mesh grid type and double aperture grid type) were tested for their ability to deliver high average current beams. In this paper, we discuss the problems associated with each type of gun system.

Abstract The interior ballistic potential equilibrium theory is used to analyse the parameters at points of pressure curves 30mm conventional launching experiment and electrothermal-chemical (ETC) experiments. Analysis shows that: compared experiment, (1) time for ETC arrive point apparently shortened; (2) relative burnt percentages propellants are smaller in tests. And gas generation brisance ...

The study of target injection, detection, measurement of laser focal point, and laser beam steering have started under co-research in Japan. The smooth-bore gas gun is developed for accurate injection. The applications of divergent laser beam and Arago spot are described for accurate measurement of target position and laser focal point. Magnetic lens for target trajectory adjustment by centerin...

IMPORTANCE Gun violence and injuries pose a substantial threat to children and youth in the United States. Existing evidence points to the need for interventions and policies for keeping guns out of the hands of children and youth. OBJECTIVES (1) To examine the association between state gun law environment and youth gun carrying in the United States, and (2) to determine whether adult gun own...

Today I want to talk about something that began for me as a detour. Over the course of the summer, putting together the Thresholds: Limits of Perception exhibition with Ana Maria Torres, I read a series of interviews of Robert Irwin by Lawrence Weschler. In these interviews, explaining what he was trying to achieve in his work, Irwin described an idea, a dichotomy, that I found very intriguing....