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Related Experiment Video

Updated: Nov 26, 2025

Measurement of Ion Concentration in the Unstirred Boundary Layer with Open Patch-Clamp Pipette: Implications in Control of Ion Channels by Fluid Flow
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A simple method for measuring electron drift velocity in gases using grid ionization chamber.

Qingmin Zhang1, Haizheng Chen2, Ruirui Fan3

  • 1Department of Nuclear Science and Technology, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, China; Shaanxi Key Laboratory of Advanced Nuclear Energy and Technology, Xi'an Jiaotong University, Xi'an, 710049, China; Shaanxi Engineering Research Center of Advanced Nuclear Energy, Xi'an Jiaotong University, Xi'an, 710049, China.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|December 8, 2020
PubMed
Summary

A new grid ionization chamber method simplifies measuring electron drift velocity in gases. This technique accurately determines electron speed under an electric field, validated with Argon and Carbon Dioxide gas mixtures.

Keywords:
Drift distanceElectron drift velocityGrid ionization chamberTime interval between cathode and anode signals

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Area of Science:

  • Experimental Physics
  • Plasma Physics
  • Gas Discharge Physics

Background:

  • Electron drift velocity is a critical parameter in understanding gas discharges and radiation detection.
  • Existing methods for measuring electron drift velocity can be complex, requiring extensive signal processing and susceptible to diffusion effects.
  • Accurate measurement of electron drift velocity is essential for optimizing detector performance and plasma simulations.

Purpose of the Study:

  • To propose and demonstrate a simplified method for measuring electron drift velocity in gases using a grid ionization chamber.
  • To reduce the complexity of experimental setup and data analysis.
  • To minimize the impact of electron diffusion on measurement accuracy.

Main Methods:

  • Utilized a grid ionization chamber with collimated alpha particles incident perpendicular to the electric field.
  • Measured electron drift velocity by dividing the electron drift distance by the time interval between cathode and anode signals.
  • Avoided complex signal processing and mitigated electron diffusion effects through experimental design.

Main Results:

  • Successfully measured electron drift velocities in a 90% Argon + 10% Carbon Dioxide gas mixture.
  • The proposed method demonstrated ease of implementation and reduced susceptibility to electron diffusion.
  • Experimental results showed excellent agreement with simulated values and existing literature data.

Conclusions:

  • The proposed grid ionization chamber method offers a simple and effective approach for measuring electron drift velocity in gases.
  • This technique provides accurate results while minimizing experimental complexity and diffusion effects.
  • The method is suitable for various gas mixtures and can be valuable for research in plasma physics and detector development.