This paper describes the ALPHA-2 apparatus, used at the CERN Antiproton Decelerator facility for the study of trapped antihydrogen atoms. Details of both the construction and performance are included. Prominence is given to both the new and the improved features, with respect to the original ALPHA assembly, of the apparatus including a stand-alone antiproton catching trap, the traps used to mix antiparticles to produce the anti-atoms, the magnetic atom trap used to hold some of them, and access for laser light to facilitate excitation of the antihydrogen 1𝑆-2𝑃 and 1𝑆-2𝑆 transitions.

R. Akbari and B.X.R. Alves and C.J. Baker and M. Baquero-Ruiz and W. Bertsche and E. Butler and C. Burrows and A. Capra and C.L. Cesar and M. Charlton and R. Collister and A. Cridland and S. Eriksson and A. Evans and L.T. Evans and N. Evetts and J. Fajans and T. Friesen and M.C. Fujiwara and D.R. Gill and P. Grandemange and P. Granum and A. Gutierrez and J.S. Hangst and M.E. Hayden and D. Hodgkinson and C.A. Isaac and A. Ishida and M.A. Johnson and J.M. Jones and S.A. Jones and S. Jonsell and A. Khramov and L. Kurchaninov and A. Little and N. Madsen and D. Maxwell and J.T.K. McKenna and S. Menary and J.M. Michan and T. Momose and P.S. Mullan and K. Olchanski and A. Olin and J. Peszka and A. Povilus and A. Powell and P. Pusa and C.Ø. Rasmussen and R.L. Sacramento and M. Sameed and E. Sarid and D.M. Silveira and C. So and S. Stracka and G. Stutter and T.D. Tharp and R.I. Thompson and C. Torkzaban and D.P. {van der Werf} and J.S. Wurtele