TPC Development at Cornell Daniel Peterson 22-October-2007 TPC Development at Cornell a model of the endplate and detector modules The Cornell group is working with LC-TPC collaborators to develop the “Large Prototype” TPC for studies of gas-amplification devices, and alignment, calibration and track finding/fitting procedures. This prototype will be operated at the EUDET facility at DESY. Cornell is developing and constructing the endplate as well as the detector module support. Providing the required panel locating precision has required studies of the manufacturing process including the machining and stress relief steps. Bulk Micromegas Purdue-3M Micromegas triple-GEM Collaborating with Purdue University, the Cornell group is performing tests of gas-amplification devices in a prototype TPC. The TPC has a 64cm drift and accepts various gas-amplification devices up to 10cm square. Recent measurements have been made with a “Bulk Micromegas” developed by the Orsay group, a Micromegas developed by Purdue and the 3M corporation, and a triple-GEM (CERN). Spatial resolutions for the “Bulk Micromegas” and triple-GEM are compared (right). a model of a detector module including the mechanical frame details of the TPC assembly, including GEM modules and the field cage measurements during studies of the manufacturing process