SU625271A1

SU625271A1 - Spectral tube

Info

Publication number: SU625271A1
Application number: SU772461551A
Authority: SU
Inventors: Анатолий Иванович Безлепкин; Анатолий Степанович Хомяк
Original assignee: Предприятие П/Я А-3695
Priority date: 1977-03-29
Filing date: 1977-03-29
Publication date: 1978-09-25

Description

(54) СПЕКТРАЛЬНАЯ ЛАМПА(54) SPECTRAL LAMP

Изобретение относитс к источникам света, излучающим узкие спектральные линии различных элементов, в частности к источникам излучени флуоресцентных спектральных линий дл использовани в «томно-абсорбционном анализе.The invention relates to light sources emitting narrow spectral lines of various elements, in particular to sources of radiation from fluorescent spectral lines for use in a volume-absorption analysis.

Известны спектральные устройства, излучающие флуоресцентные спектральные линии, состо щие из оболочки с оптически прозрачными окнами, заполненной инертным газом при низком давлении, полого катода, анода и выводов и служашие дл создани атомного пара интересующего элемента. Дл излучени указанных флуоресцентных линий в таких устройствах необходим дополнительный источник света , излучение которого фокусируетс в область лампы, .содержащую атомный пар 1 .Spectral devices are known that emit fluorescent spectral lines consisting of a shell with optically transparent windows filled with an inert gas at low pressure, a hollow cathode, an anode and leads, and which are used to create the atomic vapor of the element of interest. To emit the indicated fluorescent lines in such devices, an additional light source is needed, the radiation of which is focused into the area of the lamp containing an atomic pair 1.

Известны также лампы, состо щие из оболочки с окном, первого полого катода, служащего дл излучени спектральных линий, второго полого катода, расположенного на одной оси с первым и служащего дл создани атомного пара, пологоAlso known are lamps consisting of a cladding with a window, a first hollow cathode, which serves to emit spectral lines, a second hollow cathode, which is located on the same axis as the first and serves to create an atomic vapor, hollow

изол тора, расположенного между ними и на одной оси с указанными катодами, предотвращающего разр д с наружных боковых поверхностей катодов, анода, расположенного в полом изол торе между катодами an insulator located between them and on the same axis with the indicated cathodes, preventing discharge from the outer side surfaces of the cathodes, of the anode located in the hollow insulator between the cathodes

Однако наличие в такой конструкции лампы контакта между изол тором и анодом, с одной стороны и катодом с другой, приводит к тому, что по мере запылени изол тора разр д в полом катоде- становитс неустойч1тым и по истечении 8-2Очас (в зависимости от элемента и режима рабо-гы) лампа вы-However, the presence of a contact between the isolator and the anode, on the one hand, and the cathode, on the other, in such a design causes the discharge in the hollow cathode to become unstable as the insulator becomes dusty (depending on the element and working mode)

ходит из стро вследствие образовани провод щего мостика между анодом и катодами или между катодами.This is due to the formation of a conductive bridge between the anode and the cathodes or between the cathodes.

Целью изобретени вл етс повыще- ние долговечности лампы.The aim of the invention is to increase the durability of the lamp.

Дл достижени этого в спектральнойTo achieve this in spectral

лампе, содержащей заполненную инертным газом при низком давлении камеру с ок- ном дл выхода излучени , установленные в камере на одной оси два полыхa lamp containing a chamber filled with an inert gas at low pressure with a window to exit the radiation, mounted in the chamber on one axis two hollow

Claims

between the cathode and the anode between them, and the insulator to the through hole along the axis, the isolator is made of two parts with a gap along the specified axis opposite the window, the anode is located in the specified gap, one of the cathodes is through and the thermoelectric is additionally introduced into the lamp. a cathode located on the other side of the said cathode with respect to the anode. The drawing is a schematic diagram of the lamp. The lamp is a cylindrical glass flask 1 with a window 2 (made of a material that is optically transparent in the spectral range of 0.2–2 µm. The body of the flask contains leads to which the common anode 3 is attached, the cathode 4, a hollow cathode 5 made of the same metal and a thermal cathode 6, the hollow cathodes are placed in an isolator divided into two parts 7 and 8. The gap between the insulator parts is fixed by ceramic tubes 9. The leads are placed in ceramic tubes 1O to prevent probo between them. Lamp fittings for mounted on mica disks 11. The lamp is mounted in the base 12 and filled with an inert gas at low pressure (in particular, neon at a pressure of 5.00 Pa). A glow discharge is initiated between the anode 3 and the hollow cathode 4, which due to The cathode sputtering effect ensures in the gap the presence of a cloud of atomic vapors of the material from which the hollow cathode 4 is made. Then between the anode 3, the through hollow cathode 5 and the thermo cathode 6, the glow and arc discharge in an inert gas are respectively initiated. A combination of two bits, one of which (arc) penetrates through the hollow cathode 5, creates a highly intense emission spectrum of the element from which. This cathode is made, and provides sputtering of the cathode 5. This radiation, propagating along the axis of the lamp, causes the resonant fluorescence of atomic vapors in the specified gap. The fluorescence emission is output from the gap through the appendix with window 2 in a direction perpendicular to the axis of the lamp. Glow discharges in hollow cathodes 4 and 5 can operate in both continuous and pulsed modes with a corresponding shift of current pulses in phase. The proposed design of a spectral resonance lamp allows to increase its service life up to 15 o hour. In addition, the lamp can operate in the mode of continuous emission of resonant fluorescence spectral lines, which is impossible using a known lamp. A spectral lamp comprising a chamber filled with an inert gas at low pressure with a window for radiation output, two hollow cathodes installed in a chamber on the same axis, and an anode and an insulator with a skull hole with an axial opening between them. In order to increase the service life of the lamp, the insulator is made of two parts with a gap along the specified axis located opposite the window, the anode is located in the specified gap, one of the cathodes is full and the thermal cathode located in the tube is introduced into the lamp the same axis on the other side of the specified cathode with respect to the anode. Sources of information taken into account in the examination: 1. US patent number 3489942, class, 313-2О9, 197О.

2. US patent number 3869643, cl. 315-167,1975.

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