This improves electron flow and allows the cathode to maintain a stronger power flow. These cathodes maintain a much higher power density by heating the cathode. Cold Cathode Gauges Cold Cathode / Hot Filament Gauge Comparison Chart KJLC Cold Cathode (Inverted Magnetron) Gauge 7.6e -10 to 7. This paper describes a cold-cathode source of ions of various gases, including radioactive, based on constrictive discharge with closed electron drift. Most cathodes are hot cathodes or filaments. While cold cathode lights are widely used in many modern systems, their electricity use is often higher than alternative systems.Ī cathode is the portion of a diode where electricity flows out during power usage. A cold cathode is used in several forms of fluorescent and gas-based lighting systems, like neon signs. These cathodes, while not specifically heated like hot cathodes, still have the potential to get very hot through use. While that may seem obvious, this difference is very important to the internal functions of the cathode. A cold cathode fluorescent lamp (CCFL) is a lighting system that utilizes both fluorescence and electron discharge in order to produce light. Whether you want a brighter light to compliment your LED. It complements a mass spectrometer leak detector, which is more efficient in finding smaller leaks.A cold cathode is a cathode that is not heated. Our huge selection of cold cathode lamps and computer case lights will fit every case modders needs. Due to differing ionization potentials for different gases, the 903 is a simple solution for locating medium to fine leaks in vacuum systems. The sputtered cathode material forms a gettering surface film at the walls of the gauge tube. Such devices are simple in concept but difficult to design and construct, in practice, with the currents, voltages, beam cross-sections, and beam divergences of interest for many applications. The ions produced in the discharage are accelerated to the cathode where they are partly retained and partly cause sputtering of the cathode material. In its simplest form, a device that can produce such a beam is a cold cathode vacuum diode in which the electrons are produced through field emission from the cathode and accelerated through a foil anode into the transport region. A cold cathode gauge tube, there fore, pumps gases similarly to a sputter-ion pump (S 10-2 ltr s-1). Deactivating the high voltage at pressures above 10-2 Torr reduces the effects of contamination in the sensor. In all Cold Cathode gauges there is considerable higher gas sorption than in the ionization vacuum gauge which operates with a hot cathode. The high voltage activation feature is a convenient way for you to shut off power to the 903 locally without shutting down your entire system. Measurements in UHV up to 1 10-11 hPa with triax-cable (max. Power and high voltage status are also indicated. Cold cathode gauge heads to TPG 500 Product description. Set point activation status is shown with one of three LED indicators. The Standard 903 has one relay set point standard for process control that can be set to trip anywhere within its set point range. : a cathode in an electron tube or fluorescent lamp that is unheated and that emits electrons when bombarded by ions or subjected to light, infrared, or ultraviolet rays cold-cathode tube. Its rugged design and ability to efficiently operate in harsh environments provide fast, dependable, and stable pressure measurement. However, thermionic cathodes are bulky, and cannot be pulsed quickly. Logisys CLK12BL2 Dual Cold Cathode Light Kit, Blue. Cold Cathode lamps range from 360 lumens to 780 lumens P.L.F. Logisys 12' Dual Cold Cathode Kit, 3.0mm Tube Diameter, 680V Output Voltage, Green.
CPM Delta 1 35111 12 35110 Brightlab Junior Safelight 11W Universal Red Bulb. Since the 903 has no filament, it is resistant to vibration damage and is unaffected by sudden inrushes of air. The electron generation mechanism in standard x-ray tubes - specifically, a thermionic cathode - is reliable and capable of high current. This item Logisys Dual 12' Cold Cathode Kit - Red. A unique design feature to the 903 is a second feedthrough for ion collection, ensuring accurate reading results.
#COLD CATHODE SERIES#
Using the inverted magnetron design principle, the Series 903 can operate at pressures much lower than a traditional cold cathode sensor, as low as 10-10 Torr. The 109030004 Inverted Magnetron Cold Cathode Vacuum Transducer features a 3.0 x 10 -10 - 5.0 x 10 -3 Torr vacuum measurement range, and a size NW25 ISO-KF flange fitting. Reliable cold cathode ionization gauge technology Contamination resistant, resistant to inrushes of gas, and cleanable Mountable in any orientation Excellent customer support The Televac 7B cold cathode gauge (also called a Penning ionization gauge or cold cathode ionization gauge) has a measurement range from 10 -7 Torr up to 10 -3 Torr.
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