Optical telescopes for COMPASS RICH-1 up-grade

P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, L. Busso, V. M. Chiosso, P. Ciliberti, M. L. Colantoni, S. Costa, N. Dibiase, T. Dafni, S. Dalla Torre, V. Diaz, V. Duic, E. Delagnes, H. DeschampsW. Eyrich, D. Faso, A. Ferrero, M. Finger, H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, R. Hagemann, D. Von Harrach, F. H. Heinsius, R. Joosten, B. Ketzer, K. Konigsmann, V. N. Kolosov, I. Konorov, D. Kramer, F. Kunne, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nahle, D. Neyret, F. Nerling, P. Pagano, S. Paul, S. Panebianco, D. Panzieri, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, E. Rocco, F. Robinet, P. Schiavon, C. Schill, P. Schoenmeier, L. Silva, M. Slunecka, L. Steiger, F. Sozzi, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, H. Wollny

Research output: Contribution to conferencePaperpeer-review

2 Scopus citations


The central photon detection area of the Ring Imaging Cherenkov detector at COMPASS, a particle physics experiment at CERN SPS dedicated to hadron physics, has been upgraded from the previous system formed by wire chambers with CsI layers to a very fast UV extended multi anode photo multiplier tube array (MAPMT), including 576 tubes. The active area covered by the MAPMTs is 7.3 times smaller than the one previously equipped with CsI photocathodes, so 576 optical concentrators transforming the image from the old system focal plane to the new photocathode plane were needed. The telescope system formed by two fused silica lenses was designed, produced and assembled. The first prismatic plano-convex field lens is placed in the focal plane of the RICH mirrors. The second condenser lens is off centered and tilted and has one aspherical surface. All lenses have antireflection coating.

Original languageEnglish
StatePublished - 2006
Externally publishedYes
Event22nd Advanced Studies Institute: Symmetries and Spin, SPIN-Praha 2006 - Prague, Czech Republic
Duration: 19 Jul 200626 Jul 2006


Conference22nd Advanced Studies Institute: Symmetries and Spin, SPIN-Praha 2006
Country/TerritoryCzech Republic


  • COMPASS RICH telescope design
  • fused silica aspherical lenses


Dive into the research topics of 'Optical telescopes for COMPASS RICH-1 up-grade'. Together they form a unique fingerprint.

Cite this