Positron beams

FEB 01, 1969

These particles are now made with an intensity and energy approaching those of primary electron beams; their applications include scattering experiments, colliding‐beam experiments and annihilation photon production.

DOI: 10.1063/1.3035401

David E. Yount

POSITIVE ELECTRONS, which offer interesting comparisons with negative electrons and can be a useful source of photons, may be made by pair production in a target placed in the electron path of a linear accelerator. Greater intensity can be achieved by acceleration, by a coaxial solenoid, with magnetic quadrupoles or by a solenoid‐quadrupole combination. One important application of these positron beams is the production of “tertiary” beams of annihilation photons that can provide a partially monochromatic photon beam. Other applications include positron‐proton and electron‐proton scattering comparisons and colliding‐beam experiments in which electrons are injected at high energies into storage rings.

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More about the authors

David E. Yount, SLAC.