ULTRA-COMPACT X-RAY EMITTER Russian patent published in 2019 - IPC H01J35/00 

FIELD: physics.

SUBSTANCE: invention relates to the ultra-compact X-ray emitters, and can be used for the compact local impact devices development in medicine, technology, and everyday life. Emitter has a vacuum cylinder in the form of a cylindrical tube with the window-hole with diameter of d₀ (mm) and the perforated-type target anode located thereon, inside the tube: field-emission cathode and the gas absorber, the microchannel element (MCE), casing outside the tube with the window opposite the tube window. Tube has diameter of (1–2)d₀ and length of (4–8)d₀. Anode target is made of aluminum foil with a thickness of h ~0.02d₀, vacuum-tightly attached to the vacuum-tightly mounted on the tube end bushing end face. Cathode is made in the form of a wire end with diameter of d_K~(d₀/30-d₀/50), protruding from the dielectric holder for not more than (2–3)d_K, covered with InSb nanoparticles and located directly opposite the anode window center at a distance therefrom of ~0.5d₀. Between the tube window and the casing window there is a plane-parallel gap of width z (mm), which is blown for the anode cooling down with air flow through two branch pipes; air blowing velocity in the branch pipes is (150–200)d₀z/d/_n² [m/s], where d_n is the branch pipe diameter. Diverted (dissipated) power to the anode overheating temperature ratio is P/ΔT~0/1d_oz[W/K].

EFFECT: technical result is the dimensions extreme reduction, which allows to use the emitter for endoscopic intracavitary and intra-object applications.

1 cl, 1 dwg