Operating DELTA with a single electron

0 On 02/17/2023, the DELTA storage ring was operated with a single 1.5-GeV electron for the first time. The "beam" current is 0.42 picoampere in this case. Imagine that at a typical current of 100 milliampere [...] in Berlin are employed by the PTB (the German metrology institute) for metrology-oriented research [1]. Single-electron measurements are also conducted at the experimental storage ring IOTA of Fermilab/USA [...] distribution of photons contains additional information which can be used for beam diagnostics purposes. [1] R. Klein et al. , Physical Review Special Topics – Accelerators and Beams 11, 110701 (2008). [2] I …