RT Journal Article T1 DIRAC: A high resolution spectrometer for pionium detection A1 DIRAC Collaboration, A1 Adeva Andany, Bernardo A1 Gómez Rodríguez, Faustino A1 López Aguera, María de los Ángeles A1 Pló Casasús, Máximo A1 Romero Vidal, Antonio A1 Santamarina Ríos, Cibrán A1 Saborido Silva, Juan José A1 Vázquez Regueiro, Pablo A1 Zrelov, P. K1 DIRAC experiment K1 Double arm spectrometer K1 Pion scattering K1 Experimental techniques K1 Elementary atom AB The DIRAC spectrometer has been commissioned at CERN with the aim of detecting π+π− atoms produced by a 24 GeV/c high intensity proton beam in thin foil targets. A challenging apparatus is required to cope with the high interaction rates involved, the triggering of pion pairs with very low relative momentum, and the measurement of the latter with resolution around 0.6 MeV/c. The general characteristics of the apparatus are explained and each part is described in some detail. The main features of the trigger system, data-acquisition, monitoring and setup performances are also given. PB Elsevier SN 0168-9002 YR 2003 FD 2003-12-11 LK https://hdl.handle.net/10347/39313 UL https://hdl.handle.net/10347/39313 LA eng NO Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Volume 515, Issue 3, 11 December 2003, Pages 467-496 NO The Swiss National Science Foundation, the Ministerio de Ciencia y Tecnologia (Spain), under projects AEN96-1671 and AEN99-0488, the PGIDT of Xunta de Galicia (Spain), the Istituto Nazionale di Fisica Nucleare (Italy), the Ministery of Industry, Science and Technologies of the Russian Federation and the Russian Foundation for Basic Research (Russia), under project 01-02-17756, the IN2P3 (France), the Greek General Secretariat of Research and Technology (Greece), the University of Ioannina Research Committee (Greece), the Grant Agency of the Czech Republic, grant No. 202/01/0779, and the Japan Society for the Promotion of Science (JSPS), Grant-in-Aid for Scientific Research No. 07454056, 08044098, 09640376, 11440082, 11694099, 12440069 and 14340079. DS Minerva RD 24 abr 2026