faraday cup वाक्य
उदाहरण वाक्य
मोबाइल
- The Faraday cup can be completely separate from the gun, or it can be part of an assembly mounted to the end of the electron / ion gun and manipulated remotely.
- It is possible to set up an FEM with a probe hole in the phosphor screen and a Faraday cup collector behind it to collect the current emitted from a single plane.
- Therefore the ion current at the ion-decelerating voltage U _ g of the Faraday cup can be calculated by integrating Eq . ( 2 ) after substituting in it Eq . ( 3)
- An array of small Faraday cups or a Faraday cup on mounted on a linear manipulator can be used to measure the distribution of the beam current across the spot; this shows the beam uniformity.
- An array of small Faraday cups or a Faraday cup on mounted on a linear manipulator can be used to measure the distribution of the beam current across the spot; this shows the beam uniformity.
- Scanning coils are used to deflect the beam, such as by an electrostatic shift of the beam, where the beam is then collected using a current detector such as a Faraday cup, which acts as a direct electron counter.
- He led a team of MIT scientists who designed and built an instrument for the study of interplanetary plasma, called the modulated-grid Faraday cup after Michael Faraday, the 19th-century English scientist known for his work with electricity and magnetism.
- A single collector ICP-MS may use a multiplier in pulse counting mode to amplify very low signals, an attenuation grid or a multiplier in analogue mode to detect medium signals, and a Faraday cup / bucket to detect larger signals.
- The value of the electron-suppressor voltage ( accelerating the ions ) was set experimentally at U _ { es } =-170 V, near the point of suppression of the secondary electron emission from the inner surface of the Faraday cup.
- Essentially the Faraday cup is part of a electric current ( the number of electrons flowing through the circuit per second ) in the metal part of the circuit the number of charges being carried by the ions in the vacuum part of the circuit can be determined.
- Faraday cups are not as sensitive as electron multiplier detectors, but are highly regarded for accuracy because of the direct relation between the measured current and number of ions . This device is considered a universal charge detector because of its independence from the energy, mass, chemistry, etc . of the analyte.
- Therefore the average velocity \ langle v _ i \ rangle of ions arriving into the Faraday cup and their average energy \ langle \ mathcal { E } _ i \ rangle can be calculated ( under the assumption that we operate with a single type of ion ) by the expressions
- Fig . 2 illustrates the I-V characteristic i _ i ( V ) and its first derivative i ^ \ prime _ i ( V ) of the Faraday cup with S _ F = 0.5 cm ^ 2 installed at output of the Inductively coupled plasma source powered with RF 13.56 MHz and operating at 6 mTorr of H2.
- The conventional Faraday cup is applied for measurements of ion ( or electron ) flows from plasma boundaries and comprises a metallic cylindrical receiver-cap 1 ( Fig . 1 ) closed with, and insulated from, a washer-type metallic electron-suppressor lid-2 provided with the round axial through enter-hollow of an aperture with a surface area S _ F = \ pi D ^ 2 _ F / 4.
- अधिक वाक्य: 1 2
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