Taking current from an insulator?

In summary: Collecting-Emissions-from-Ions-Struck-into-a-Graphite-Cup-In summary, this device uses a Faraday cup to collect electrons that are emitted when ions are struck into the cup. The dynode electrode material is important for the device to work properly.
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d.sonali20
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taking current from an insulator??

I am working on a project that uses a Faraday cup. Its consists of a metallic cylinder(pipe like) with an electrode at the bottom.The ions enter the cylinder and hit the electrode.The resulting current is carried away from the electrode to an amplifier by a wire .Now.the electrode that i am using is an insulator. So how do i provide the electrical connection.the electrode being an insulator,will it give any charge for the wire to carry
 
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A Faraday detector consists of a metal cup, that is placed in the path of the particle beam. The aerosol has to pass the filter inside the cup. The filter has to be isolated. It is connected to the electrometer circuit which measures the current.

Insulators do not permit current flow. Conductors, like wire, for example, pass current. How can an electrode be an insulator? Sounds contradictory. Can you post a diagram of your apparatus? Do you have a reference source for your experiment?
 
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www.chm.bris.ac.uk/ms/theory/detection.html
in the above website its given that the BeO ,CsSb,GaP can be used as electrode material and BeO is definitely an insulator...
 
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The Faraday cup or cylinder electrode detector is very simple. The basic principle is that the incident ion strikes the dynode surface which emits electrons and induces a current which is amplified and recorded.

The dynode electrode is made of a material like CsSb, GaP or BeO. The secondary emission from the dynode electrode produces one level of signal amplification.

Those secondary electrons represent the desired signal and are collected by an electrical lead (often the center conductor of a coaxial cable). It conducts the current to a measuring instrument. Detection can be as simple as an ammeter in the conducting lead to ground or a voltmeter or oscilloscope displaying the voltage developed across a resistor from the conducting lead to ground.
 
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to what is this conducting lead connected??the electrode??
 
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The material inside the Faraday Cup (FC) that emits electrons (secondary emission) when ions impact on it is called the dynode electrode.

The reliable operation of a FC as a detector depends on the ability of the device to recapture those electrons ejected when energetic particles strike its interior dynode electrode.

In the below tech note a graphite cup is used to collect those electrons. The output braided wire is attached to the back side of the graphite.

http://www.scribd.com/doc/20191210/Faraday-Cup-Tech-Note
 

1. What is an insulator?

An insulator is a material that does not easily allow the flow of electric current. It has a high resistance to the flow of electrons and is used to prevent electrical accidents and maintain the flow of electric current in a desired path.

2. How is current taken from an insulator?

Current can be taken from an insulator by applying a strong electric field. This causes the electrons within the insulator to move and creates a flow of current. Another way is by using a conductive material, such as a metal wire, in contact with the insulator, which allows the transfer of charge and current.

3. What are the challenges of taking current from an insulator?

One of the main challenges of taking current from an insulator is its high resistance to the flow of electrons. This means that a strong electric field or a conductive material with a high voltage may be needed to overcome this resistance and create a flow of current. Additionally, insulators can also produce excess heat when current is taken from them, which can lead to damage or failure of the material.

4. Can current be taken from all types of insulators?

No, not all insulators are suitable for taking current. Some insulators, such as rubber and plastic, have very high resistance and may not allow the flow of current. Other factors such as the thickness and composition of the insulator can also affect its ability to conduct current. It is important to choose the right type of insulator for the specific application.

5. What are some common uses of taking current from an insulator?

Taking current from an insulator is commonly used in electrical and electronic devices, such as capacitors, transformers, and power lines. It is also used in specialized applications such as insulating materials for high voltage equipment and insulating coatings for wires and cables. In addition, insulators are important for safety purposes in electrical systems, preventing accidental contact with live wires and preventing short circuits.

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