000873931 001__ 873931 000873931 005__ 20210130004537.0 000873931 0247_ $$2doi$$a10.1016/j.nima.2020.163419 000873931 0247_ $$2ISSN$$a0168-9002 000873931 0247_ $$2ISSN$$a1872-9576 000873931 0247_ $$2altmetric$$aaltmetric:74243279 000873931 0247_ $$2WOS$$aWOS:000518368800048 000873931 037__ $$aFZJ-2020-01104 000873931 082__ $$a530 000873931 1001_ $$0P:(DE-HGF)0$$aBurkert, V. D.$$b0$$eCorresponding author 000873931 245__ $$aThe CLAS12 Spectrometer at Jefferson Laboratory 000873931 260__ $$aAmsterdam$$bNorth-Holland Publ. Co.$$c2020 000873931 3367_ $$2DRIVER$$aarticle 000873931 3367_ $$2DataCite$$aOutput Types/Journal article 000873931 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1607968581_18530 000873931 3367_ $$2BibTeX$$aARTICLE 000873931 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000873931 3367_ $$00$$2EndNote$$aJournal Article 000873931 500__ $$aKein Post-Print vorhanden! 000873931 520__ $$aThe CEBAF Large Acceptance Spectrometer for operation at 12 GeV beam energy (CLAS12) in Hall B at Jefferson Laboratory is used to study electro-induced nuclear and hadronic reactions. This spectrometer provides efficient detection of charged and neutral particles over a large fraction of the full solid angle. CLAS12 has been part of the energy-doubling project of Jefferson Lab’s Continuous Electron Beam Accelerator Facility, funded by the United States Department of Energy. An international collaboration of 48 institutions contributed to the design and construction of detector hardware, developed the software packages for the simulation of complex event patterns, and commissioned the detector systems. CLAS12 is based on a dual-magnet system with a superconducting torus magnet that provides a largely azimuthal field distribution that covers the forward polar angle range up to 35, and a solenoid magnet and detector covering the polar angles from 35° to 125° with full azimuthal coverage. Trajectory reconstruction in the forward direction using drift chambers and in the central direction using a vertex tracker results in momentum resolutions of 1% and 3%, respectively. Cherenkov counters, time-of-flight scintillators, and electromagnetic calorimeters provide good particle identification. Fast triggering and high data-acquisition rates allow operation at a luminosity of cm−2s−1. These capabilities are being used in a broad program to study the structure and interactions of nucleons, nuclei, and mesons, using polarized and unpolarized electron beams and targets for beam energies up to 11 GeV. This paper gives a general description of the design, construction, and performance of CLAS12. 000873931 536__ $$0G:(DE-HGF)POF3-632$$a632 - Detector technology and systems (POF3-632)$$cPOF3-632$$fPOF III$$x0 000873931 588__ $$aDataset connected to CrossRef 000873931 7001_ $$0P:(DE-HGF)0$$aElouadrhiri, L.$$b1 000873931 7001_ $$0P:(DE-HGF)0$$aAdhikari, K. P.$$b2 000873931 7001_ $$0P:(DE-HGF)0$$aAdhikari, S.$$b3 000873931 7001_ $$0P:(DE-HGF)0$$aAmaryan, M. 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