Hydrogen injector based on penning discharge with metal hydride cathode

• Main Authors: Sereda, I.N., Hrechko, Ya.O., Tseluyko, A.F., Ryabchikov, D.L.
• Format: Article
• Language: English
• Published: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2018
• Series: Вопросы атомной науки и техники
• Subjects: Низкотемпературная плазма и плазменные технологии
• Online Access: http://dspace.nbuv.gov.ua/handle/123456789/148843

The paper presents the results of the investigation of a neutral-hydrogen pulse injector based on Penning discharge with a metal hydride hollow cathode. The source of chemically pure hydrogen is a getter alloy Zr₅₀V₅₀ made in the form of a hollow cathode. The main release of hydrogen into the gas phase occurs under the influence of discharge current (about 20 A) in a short period of time (several hundred microseconds), during the operation in the high-current discharge regime. It is shown, that the propagation velocity of the gas front depends on the discharge current and is determined by the hydrogen temperature. The maximum velocity of gas front propagation is obtained at the level of 5·10⁵ cm/s. The amount of hydrogen desorbed per 400-μc pulse isabout 1.5·10⁻³ cm³ under normal conditions and the energy is expended on the level of 0.34 J.