Buffer Gas Trap Beam

The buffer gas trap beam is a pulsed mode beam, capable of delivering short (~1 ns), intense positron pulses to a target in an electromagnetic field-free chamber. The pulses are generated using a buffer gas trap technique, where positrons are confined in a potential well through inelastic scattering with a gas, and then periodically released. This beamline is equipped with a time buncher, single gap accelerator and various scintillating detectors and beam profiling detectors. It is used in ongoing positronium spectroscopic studies.