Stable electron beams approaching 5 GeV were produced in helium via self-waveguiding in a plasma channel using an all-reflective off-axis axicon setup at rates up to 3.3 Hz.
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A prototype five-layer ALPIDE tracker measures positrons at 0.12 per beam shot under 1.7/mm² background density using Hough-transform tracking, with rates matching expected nonlinear Breit-Wheeler levels and false positives four orders of magnitude lower when the foil is removed.
citing papers explorer
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High-repetition-rate, all-reflective optical guiding and electron acceleration in helium using an off-axis axicon
Stable electron beams approaching 5 GeV were produced in helium via self-waveguiding in a plasma channel using an all-reflective off-axis axicon setup at rates up to 3.3 Hz.
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Initial Performance of the E320 Tracker
A prototype five-layer ALPIDE tracker measures positrons at 0.12 per beam shot under 1.7/mm² background density using Hough-transform tracking, with rates matching expected nonlinear Breit-Wheeler levels and false positives four orders of magnitude lower when the foil is removed.