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Related Experiment Videos

Simple formulas for the beam lifetime analysis in an electron storage ring.

Tae-Yeon Lee1

  • 1Pohang Accelerator Laboratory San 31, Hyoja-dong, Pohang, Kyungbuk, 790-784 Korea.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|June 1, 2004
PubMed
Summary

Simple formulas estimate Touschek and beam-gas scattering lifetimes using measured total beam lifetime and its derivative. These practical methods are effective when radiative polarization is suppressed or saturated, demonstrated at the Pohang Light Source.

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Area of Science:

  • Accelerator Physics
  • Particle Beam Dynamics

Background:

  • Beam lifetime is crucial for accelerator operation.
  • Touschek and beam-gas scattering are primary loss mechanisms.
  • Accurate lifetime component estimation is challenging.

Purpose of the Study:

  • Develop practical formulas for estimating Touschek and beam-gas scattering lifetimes.
  • Provide a method independent of detailed theoretical models.
  • Validate the formulas using experimental data.

Main Methods:

  • Derived simple formulas based on total beam lifetime (tau) and its time derivative (dtau/dt).
  • Required suppression or saturation of radiative polarization for accuracy.
  • Applied the formulas to experimental data from the Pohang Light Source (PLS).

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Main Results:

  • Successfully estimated Touschek and beam-gas scattering lifetimes.
  • Formulas demonstrated high accuracy and practicality.
  • Analysis of PLS beam lifetime provided a concrete application example.

Conclusions:

  • The derived formulas offer a straightforward and accurate method for lifetime component analysis.
  • These practical tools can aid in accelerator operational tuning and diagnostics.
  • The method is broadly applicable where radiative polarization effects are managed.