What is it about?

The direct simultaneous detection of electron and positron bunch signals was successfully performed for the first time with wideband pickups and a detection system at the positron capture section of the SuperKEKB factory. The time interval between the electron and positron bunches, their bunch lengths, and bunch intensities depending on the phase of accelerating structures were measured to investigate their capture process and to maximally optimize the positron intensity.

Featured Image

Why is it important?

The results show that the time intervals were measured in the range of 135--265~ps, and the line-order switch of the electron and positron bunches in the axial direction was clearly observed as a function of the phase. The positron (electron) intensity was maximized at the optimal phase (180~deg shifted from the optimum). These series of measurements have never been experimentally conducted so far.


It is demonstrated that the positron intensity can be systematically optimized with this system as functions of beam parameters in multidimensional spaces for any positron capture section.

Dr. Tsuyoshi Suwada
High Energy Accelerator Reseach Organization (KEK)

Read the Original

This page is a summary of: First simultaneous detection of electron and positron bunches at the positron capture section of the SuperKEKB factory, Scientific Reports, June 2021, Springer Science + Business Media,
DOI: 10.1038/s41598-021-91707-0.
You can read the full text:



The following have contributed to this page