TPG, test results

Article Article scientifique Article TPG, test results eng 2005 author Ableev V. author Ambrosino F. author Apollonio M. author Bene Pierre 26443 author Blondel Alain 133489 author Catanesi M. G. author Chiefari G. author Chimenti P. author Favaron P. author Gastaldi U. author Giani S. author Giannini G. author Gschwendtner-Riegler Edda 566182 author Legrand J.-C. author Lollo M. author Musa L. author Musso G. author Napolitano M. author de Oliveira R. author Palladino V. author Radicioni E. author Richeux Jean-Pierre 25926 author Rigato M. author Ropelewski L. author Roscilli L. author Sandstrom Rikard 585382 author Saracino G. author Sauli F. author van Stenis M. author Temnikov P. 2944-2950 10.1109/TNS.2005.862899 0018-9499 http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=1589304 TPG is the acronym for Time Projection Chamber with GEM amplification, high-granularity hexaboard read-out and FADC electronics. We have constructed a TPG read-out module, called TPG-head, with three GEM foils and a multilayer board, called hexaboard, covered with 710 000 hexagonal pads of 300 mum size. The total active area of this module is a disk of 30 cm diameter. The 710 000 pads are read by three sets of 576 strips dephased by 120 degrees. Each strip is read by a FADC channel with 100 ns sampling time. The module is mounted in a test-bed formed by a cylindrical field cage of 80 cm diameter and 150 cm length inside a solenoidal magnet that operates with a magnetic field up to B=0.7 Tesla. Tests with X-ray sources show an intrinsic spatial resolution of the order of 40 mum. The threshold for transverse momentum measurement of low energy tracks is below 0.1 MeV/c with a magnetic field of 0.07 Tesla. At 0.7 Tesla the intrinsic space point resolution of the chamber is such that the error on the measurement of the transverse momentum is DeltaPtsime0.1 MeV/c in absence of distortions from the drift region Gaseous detectors GEM Hexaboard Time projection chamber (TPC) Dewey 500.2 34 Département de physique nucléaire et corpusculaire 132 false IEEE transactions on nuclear science 52 6 568617c0-6f79-4680-afdb-06af3d5b754e Article (Published version) Restricted Blondel5.pdf 2281209 application/pdf restrictedAccess Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

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