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Preliminary results of 3D-DDTC pixel detectors for the ATLAS upgrade

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arxiv 0910.3788 v1 pith:NWUNPA7U submitted 2009-10-20 physics.ins-det

Preliminary results of 3D-DDTC pixel detectors for the ATLAS upgrade

A. La Rosa , M. Boscardin , G.-F. Dalla Betta , G. Darbo , C. Gemme , H. Pernegger , C. Piemonte , M. Povoli
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S. Ronchin A. Zoboli N. Zorzi E. Bolle M. Borri C. Da Via S. Dong S. Fazio P. Grenier S. Grinstein H. Gjersdal P. Hansson F. Huegging P. Jackson M. Kocian F. Rivero O. Rohne H. Sandaker K. Sjobak T. Slavicek W. Tsung D. Tsybychev N. Wermes C. Young
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3D Silicon sensors fabricated at FBK-irst with the Double-side Double Type Column (DDTC) approach and columnar electrodes only partially etched through p-type substrates were tested in laboratory and in a 1.35 Tesla magnetic field with a 180GeV pion beam at CERN SPS. The substrate thickness of the sensors is about 200um, and different column depths are available, with overlaps between junction columns (etched from the front side) and ohmic columns (etched from the back side) in the range from 110um to 150um. The devices under test were bump bonded to the ATLAS Pixel readout chip (FEI3) at SELEX SI (Rome, Italy). We report leakage current and noise measurements, results of functional tests with Am241 gamma-ray sources, charge collection tests with Sr90 beta-source and an overview of preliminary results from the CERN beam test.

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