The Northern Site of the Pierre Auger Observatory

TL;DR

The paper discusses the design, scientific goals, and technical plans for the Northern Pierre Auger Observatory, aimed at advancing ultra-high energy cosmic ray research and charged particle astronomy.

Contribution

It presents the detailed layout and technical implementation plans for the Northern Auger Observatory, extending cosmic ray investigations to the northern hemisphere.

Findings

Results on energy spectrum and composition from the Southern Observatory.

Design and technical plans for the Northern Observatory.

Potential to unveil cosmic ray origins through northern sky observations.

Abstract

The Pierre Auger Observatory is a multi-national project for research on ultra-high energy cosmic rays. The Southern Auger Observatory in Mendoza province, Argentina, is approaching completion in 2007 with an instrumented area of 3,000 km^2. It will accurately measure the spectrum and composition of ultra-high energy cosmic rays up to and beyond the predicted GZK feature. We are obtaining results on the energy spectrum, mass composition and distribution of arrival directions on the southern sky. The Northern Auger Observatory is designed to complete and extend the investigations begun in the South. It will establish charged particle astronomy and thus open a new window into the universe. The distribution of arrival directions of the highest energy events will point the way to unveiling the almost century old mystery of the origin and nature of ultra-high energy cosmic rays. Achieving this goal requires collecting many more events in spite of the steeply falling energy spectrum. The planned northern site will have an instrumented area of 4,000 square miles (10,370 km}^2 in Southeast Colorado, USA. The paper covers the science of charged particle astronomy, the layout and the technical implementation of the Northern Auger Observatory.