Hollow cathode discharge

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August undefined, 2024

NettetHollow cathodes are very useful electron generating devices. One of the main advantages of hollow cathodes is that electrons being emitted from the emitter surface may actually accelerate to... Nettet2. mar. 2024 · Hollow cathode discharge (HCD) ion source explosives and related-compounds simultaneous detection oxidation adduct ions Birch type reduction hydride …

Basic Mechanisms Contributing to the Hollow Cathode Effect

NettetThe current–voltage characteristics of the hollow-cathode plasma source in oxygen displayed a monotonically increasing character, and the voltage dependence of the discharge current was exponential. At the same time, for argon, nitrogen, and helium, the discharge voltage remained unchanged over a current ranging from 0.1 A to 1 A. Nettet13. jul. 2024 · To initiate the hollow-anode discharge at low pressure, a considerable electron flux from the cathode is required [ 12 – 14 ]. To create such a flux, different methods can be used. In the system shown in figure 2, the discharge is initiated as a result of the forced ignition of the cathode spot. tangerine vest sams club

Characteristics of RF Hollow Cathode Discharge at Moderate …

NettetHollow cathode discharge: application of a deposition treatment in the iron sintering . × Close Log In. Log in with Facebook Log in with Google. or. Email. Password. Remember me on this computer. or reset password. Enter the email address you signed up with and we'll email you a ... NettetThe current–voltage characteristics of the hollow-cathode plasma source in oxygen displayed a monotonically increasing character, and the voltage dependence of the … Nettet9. sep. 2013 · Studies of the hollow-cathode discharge have shown the existence of energetic ions at high-discharge currents that are likely responsible for the high erosion rates observed on the cathode keeper e... Reduction of Energetic Ion Production in Hollow Cathodes by External Gas Injection Journal of Propulsion and Power Skip to … tangerine vanilla cashew macadamia

The hollow cathode discharge (Conference) OSTI.GOV

Development of Removable Hollow Cathode Discharge Apparatus …

NettetTypical shapes of the macro and microhollow cathode discharges (1: open microhollow cathode, 2: closed microhollow cathode, 3: cylindrical hollow cathode, 4: plane … Nettet12. feb. 2024 · A hollow cathode discharge cell has been developed for a variety of sample phases. To make the experimental apparatus compact, we have adopted DC … tangerine vet clinic tucsonNettetAbstract. The low pressure glow discharges considered in this paper are the hollow cathode (Paschen), and the flat cathode (Grimm). Both discharges have similar voltage … tangerine varieties california

"NettetThe hollow cathode effect allows electrical conduction at a lower voltage or with more current in a cold-cathode gas-discharge lamp when the cathode is a conductive … " - Hollow cathode discharge

Hollow cathode discharge

Nettet24. jul. 2000 · Hollow cathodes are routinely used to provide electrons for a wide variety of electric propulsion devices. Discharges to them are usually initiated by applying a high potential to an external... Nettet30. okt. 2024 · A hollow cathode source is designed to generate multiple double layer (MDL) structures by the trapping of charged particles in the absence of any auxiliary plasma source or magnetic field, while the glow discharge switches between two distinctly different stable regimes.

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Nettet1. sep. 2024 · Where the electrons were accelerated in the negative glow region and then enhanced ionization and excitation processes. Fig. 2 observed the influence of gas … NettetThe hollow cathode effect allows electrical conduction at a lower voltage or with more current in a cold-cathode gas-discharge lamp when the cathode is a conductive tube open at one end than a similar lamp with a flat cathode. …. In a hollow cathode, the electron emitting surface is in the inside of the tube.

Nettet1. jul. 2013 · An experimental investigation of a DC hollow cathode nitrogen glow discharge has been done at different gas pressure ranged from (0.075 to 0.75) torr and different radial positions of discharge ... Nettet1. jan. 2007 · Hollow cathode discharge (HCD) is widely used in material processing and plasma emission spectroscopy due to several advantages over other plasma sources.

Nettet25. sep. 2024 · Hollow cathode arc (HCA) discharges have been used in extensive applications [1–8], ranging from vacuum microelec- tronic devices, lasers, and materials processing to spacecraft propulsion, due to the outstanding current-delivering capacity and structural simplicity of HCA devices. Nettet29. mar. 2024 · The voltage transition phenomenon of the C12A7 hollow cathode under high-current conditions (more than 10 A) changed some key structures of the C12A7 …

Nettet5. aug. 2024 · The plasma discharge from hollow cathodes can also be operated with or without an applied magnetic field and at high currents generates significant self …

Nettet13. feb. 2024 · Abstract The paper proposes a new glow discharge ion source based on a hollow cathode. The proposed source produces a denser plasma than the previously used glow discharge sources. It is shown experimentally that the maximum rate of cathode sputtering of a conducting solid sample in a hollow cathode ~25 mm in … tangerine wash houseNettetA new structure of lanthanum hexaboride (LaB 6 ) hollow cathode insert, which has a cylindrical core, is studied in this paper. The cylindrical core is inserted into and connected at the back of the traditional hollow cylinder part. Two inserts with core and one traditional insert are tested. The new structure can largely reduce the cathode temperature, the … tangerine wall white furniture black accentsNettet1. nov. 2024 · Hollow cathodes are widely used as electron sources and neutralizers in ion and Hall electric propulsion. Special applications such as commercial aerospace and … tangerine wall colorNettetPioneering observations on the luminescent phenomena generated in evacuated tubes belong to the history of spectroscopy and date as far back as the mid-1800s. (1,2) Within this field of research, the first description of a hollow cathode discharge (HCD) published in the scientific literature can be found in the early years of this century, when ... tangerine welcome offerNettet1. sep. 2024 · Gas discharges between a cathode with a hollow structure and an arbitrarily formed anode are known as hollow cathode discharges (HCDs) . Because … tangerine watercolor floral tomsNettet9. des. 2016 · 2D Fluid Model. Figure 2 shows the schematic diagram of the HC discharge electrode used in the simulation. The diameter of the hole D is variable from 0 to 30 mm, while the radius of grounded anode keeps in R.The depth of the hollow l is 10 mm, and the gap d between cathode and anode electrodes is 20 mm. Because the hole … tangerine whirlpoolNettet12. feb. 2024 · A hollow cathode discharge cell has been developed for a variety of sample phases. To make the experimental apparatus compact, we have adopted DC discharge, and the discharge cell was inexpensively constructed for replacement with commercially available vacuum parts. The most distinctive attribute of the developed … tangerine weather