unknownDetectors and experimental techniquesCERN-OBJ-DE-0802017-05-29T14:36:00Zhttp://cds.cern.ch/record/2266338http://cds.cern.ch/record/2266338oai:cds.cern.ch:2266338 unknownDetectors and experimental techniquesCERN-OBJ-DE-0812017-05-29T14:46:22Zhttp://cds.cern.ch/record/2266342http://cds.cern.ch/record/2266342oai:cds.cern.ch:2266342 Prototype for the ALEPH Time Projection ChamberDetectors and experimental techniquesCERN-OBJ-DE-085This is a prototype endplate piece constructed during R&D for the ALEPH Time Projection Chamber (TPC). ALEPH was one of 4 experiments at CERN's 27km Large Electron Positron collider (LEP) that ran from 1989 to 2000. ALEPH's TPC was a large-volume tracking chamber, 4.4 metres long and 3.6 metres in diameter - the largest TPC in existance at the time. This object is one of the endplates of a “Kind” sector, the smallest of the three types of sectors. The patterns etched into the copper form the cathode pads that measured particle track coordinates in the r-phi direction. It included a laser calibration system, a gating system to prevent space charge buildup, and a new radial pad geometry to improve resolution. the ALEPH TPC allowed for precise momentum measurements of the high-momentum particles from W and Z decays. The following institutes participated: CERN, Athens, Glasgow, Mainz, MPI Munich, INFN-Pisa, INFN-Trieste, Wisconsin.1980http://cds.cern.ch/record/2266346http://cds.cern.ch/record/2266346oai:cds.cern.ch:2266346 unknownDetectors and experimental techniquesCERN-OBJ-DE-0862017-05-29T14:54:26Zhttp://cds.cern.ch/record/2266347http://cds.cern.ch/record/2266347oai:cds.cern.ch:2266347 unknownDetectors and experimental techniquesCERN-OBJ-DE-0882017-05-30T07:18:55Zhttp://cds.cern.ch/record/2266443http://cds.cern.ch/record/2266443oai:cds.cern.ch:2266443 unknownDetectors and experimental techniquesCERN-OBJ-DE-0902017-05-30T07:21:17Zhttp://cds.cern.ch/record/2266445http://cds.cern.ch/record/2266445oai:cds.cern.ch:2266445 unknownDetectors and experimental techniquesCERN-OBJ-DE-0922017-05-30T07:24:07Zhttp://cds.cern.ch/record/2266447http://cds.cern.ch/record/2266447oai:cds.cern.ch:2266447