faraday cup वाक्य
उदाहरण वाक्य
मोबाइल
- The current of each ion beam is then measured using a'Faraday cup'or multiplier detector.
- Some Faraday cup assemblies include a phosphor screen as well.
- In a metal housing ( Faraday cup ) a particle filter is mounted on an insulator.
- C _ F-capacity of Faraday cup.
- Faraday cups are used e . g . in mass spectrometers being an alternative to secondary electron multipliers.
- A Faraday cup is a detector that measures the current in a beam of charged ( aerosol ) particles.
- Signal from R _ F is the Faraday cup I-V characteristic which can be observed and memorized by oscilloscope
- Typically, some type of electron multiplier is used, though other detectors including Faraday cups and ion-to-photon detectors are also used.
- The signal from R _ F enables an observer to acquire an I-V characteristic of the Faraday cup by oscilloscope.
- The advantage of the Faraday cup is its robustness and the possibility to measure the ion or electron stream absolutely.
- The ion concentration n _ i in the ion flow at the Faraday cup vicinity can be calculated by the formula
- Similarly, a Faraday cup can act as a collector for electrons in a vacuum ( for instance from an electron beam ).
- Its Faraday cups have collected data on plasma throughout the solar system : near Earth on Heliosheath on Voyager 1 and Voyager 2.
- In a " multicollector " instrument, the ion collector typically has an array of Faraday cups, which allows the simultaneous detection of multiple isotopes.
- The I-V curves can be recorded by using a camera connected to computer controlled data handling or by direct measurement with a movable Faraday cup.
- Thus, a measured current of one nanoamp ( 10 " 9 A ) corresponds to about 6 billion ions striking the faraday cup each second.
- The Faraday cup consists of a shielded cup with an aperture, which collects the kinetically active electrons or ions, and an output wire, which is connected to an nanocoulombmeter.
- A current integrator is also used to measure the electric charge on a Faraday cup in a residual gas analyzer to measure partial pressures of gasses in a vacuum.
- This assembly allows the secondary ions to be focused based on their kinetic energy and mass-charge ratio in order to be accurately collected using a series of Faraday cups.
- To measure the number of electrons that were scattered at different angles, a faraday cup electron detector that could be moved on an arc path about the crystal was used.
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