Source of the highest energy Galactic Cosmic Rays

There are multiple strands of evidence for a distinct population of high energy Galactic Cosmic Rays (GCRs), “component B”, consistent with a Peters cycle at energies well beyond the main population of supernova-remnant-accelerated CRs. We present evidence that the source of these GCR’s was a single transient event and identify a possible relic of the event. The consistency of such a scenario with constraints from CR flux, GCR spectral shape and anisotropy, and the rate of known transient event types, will be discussed.