The corridor boundary satisfies all three physical requirements for the DAMPE-identified nearby magnetic cosmic-ray accelerator (Peters cycle at 15 TV rigidity)

The DAMPE collaboration (Nature, April 29, 2026) identified a nearby magnetic cosmic-ray accelerator with: (1) charge-dependent energy limit confirming the Peters cycle, (2) local position within several hundred parsecs, (3) maximum rigidity of 15 TV. The galactic magnetic reversal boundary (corridor) independently satisfies all three requirements: (1) it is a magnetic field reversal zone confirmed by Faraday RM measurements; (2) the Calgary GMIMS places it at 400–700 pc; (3) R_max = B × L = 3 μG × 2.1 kpc ≈ 19 TV, within 24% of the observed 15 TV (within the uncertainty of the local interstellar field strength 3–6 μG). These measurements were made prior to and independently of the DAMPE result.

Assumptions

- B = 3 μG is an appropriate field strength for the reversal boundary (field may be near zero at the exact node; peak field adjacent to the node is more relevant)
- The Peters cycle coherence length calculation (R_max = B×L) applies to a magnetic reversal boundary, not only to a uniform field region
- The 24% discrepancy between predicted (19 TV) and observed (15 TV) is within measurement uncertainty

Open Questions

- What is the magnetic field strength at the corridor boundary node, as opposed to within each domain?
- Has a Peters cycle calculation been applied to a magnetic reversal boundary in the published literature?
- Can the DAMPE directional anisotropy data identify the corridor as the accelerator source direction?

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