An Inductive Pulse Power-Amplifying Stage with Electric-Explosion Circuit Switching

An inductive power-amplifier stage based on a two-coil assembly and two electrically exploded conductors used as circuit breakers is described. Owing to the magnetic flux conservation, the interruption of the current in the first of the storage coils causes an increase of the current in the second coil, which results in a rapid thermal burst of the second electrically exploded conductor. As a result, the load-current rise-time is 20 times less than the charging-current rise time and the amplitude of the current increases.     

Acceleration of Microparticles in an Electrothermal Accelerator with a Multigap Scheme of the Discharge Unit

The results of an experimental study of pulsed streams generated by an electrothermal launcher and the acceleration dynamics of microparticles in these flows are described. The experimental data obtained, in particular, by using laser probing of flows have confirmed that microparticles are captured and accelerated by the gas flow region following the head shock wave. The use of a multigap design of the accelerator discharge unit allowed for efficient formation of this region. Analyzing the coatings from powder materials deposited with the help of the electrothermal launcher has demonstrated the possibility of obtaining high-quality coatings.     

New Motor Oil for Heavy–Duty Transport Diesels

The stages and results of refining a new oil, Galol M–4042 TD, primarily intended to replace M–16IKhP–3 oil (GOST 25770) in two–stroke transport diesels, are discussed in detail in [1]. Galol M–4042 TD belongs to the SAE–40 class, i.e., it is a summer oil by definition [2]. The new oil, like M–16IKhP–3 oil, exclusively contains barium–containing additives, which is predetermined by the specific conditions of operation in two–cycle transport diesels with a high degree of boosting.