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Related Concept Videos

Resonance in an AC Circuit01:26

Resonance in an AC Circuit

The property of an inductor makes it resist any change in the current passing through it, while the property of a capacitor is to build up the charge across its terminals. Hence, if an inductor and capacitor are connected in series, they have opposite effects on the relative phase between current and voltage. The current through the circuit undergoes forced oscillation at the frequency of the source. The resistance term in an R-L-C circuit acts as a damping term because power is dissipated...
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
Series Resonance01:17

Series Resonance

The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...
Sound Waves: Resonance01:14

Sound Waves: Resonance

Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
Ion Exchange01:17

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or basic...
Parallel Resonance01:23

Parallel Resonance

The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:

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Related Experiment Video

Updated: Jun 2, 2026

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
11:45

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Published on: August 17, 2017

Note: flowing ion population from a resonance cavity source.

Lisa E Gayetsky1, Kristina A Lynch

  • 1Department of Physics and Astronomy, Dartmouth College, Hanover, New Hampshire 03755, USA. Lisa.E.Gayetsky@Dartmouth.edu

The Review of Scientific Instruments
|May 3, 2011
PubMed
Summary
This summary is machine-generated.

Researchers studied ion flow velocity in a plasma facility. They found ion flow energy to be 12-15 eV, a factor previously overlooked in analysis.

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Area of Science:

  • Plasma Physics
  • Ionospheric Research

Background:

  • Dartmouth College's thermal plasma facility uses a microwave plasma source.
  • The facility generates ionosphere-like plasma via a two-step process, involving a resonance cavity and a sheath.

Purpose of the Study:

  • To analyze the impact of ion flow velocity on plasma characteristics.
  • To investigate a phenomenon previously neglected in the analysis of this plasma source.

Main Methods:

  • Utilized a microwave plasma source within a resonance cavity.
  • Observed plasma behavior as it passed through a sheath into the experimental region.

Main Results:

  • Identified significant ion flow velocity imparted by the sheath.
  • Predicted ion flow energy to be between 12-15 eV based on conservation laws.
  • Experimental results showed agreement with theoretical predictions.

Conclusions:

  • The ion flow velocity is a critical parameter in this plasma facility.
  • Previous analyses underestimated the energy transfer due to the sheath effect.
  • Accurate characterization of ion energy requires accounting for flow velocity.