Speaker
Dr
Maria Margherita Obertino
(Universita' del Piemonte Orientale)
Description
Silicon 3D detectors consist of an array of columnar electrodes (radius ∼ 5µm) of both doping types which penetrate entirely in the detector bulk, perpendicularly to the surface. This structure decouples the electrode distance from the sensor substrate thickness. The close electrode spacing provides several advantages compared to the planar sensor design: low full depletion voltage (∼ 10 V), fast charge collection time, reduced charge trapping probability and therefore high radiation hardness. As a result, 3D detectors are emerging as one of the most promising technologies for innermost layers of tracking devices for the foreseen upgrades of the LHC.
Until recently, properties of 3D sensors have been investigated mostly with ATLAS readout electronics. 3D pixel sensors compatible with the CMS pixel PSI146 read-out chip were first fabricated at SINTEF (Oslo, Norway), and more recently at FBK (Trento, Italy) and CNM (Barcelona, Spain). Several sensors with different electrode configurations (single n-type electrode (1E), two n-type electrodes (2E), and four n-type electrodes (4E) per pixel cell), all bump-bonded with the CMS pixel PSI46 read-out chip, were characterized in laboratory and tested at Fermilab with a proton beam of 120 GeV/c. Preliminary results of the data analysis will be presented.
Primary author
Dr
Maria Margherita Obertino
(Universita' del Piemonte Orientale)
Co-authors
A. Krzywda
(Purdue University)
A. Kumar
(SUNY)
A. Solano
(INFN e Universita' di Torino)
A. Vilela
(INFN Torino)
Alan Prosser
(Fermilab, Batavia)
B. Meier
(Paul Scherrer Institute (PSI), Switzerland)
C. Lei
(Fermilab, Batavia)
D. Bortoletto
(Purdue University)
D. Menasce
(INFN Milano)
E. Alagoz
(Purdue University)
G. Bolla
(Purdue University)
G.F. Dalla Betta
(INFN e Universita' di Trento)
H-K. Kaestli
(Paul Scherrer Institute (PSI), Switzerland)
I. Osipenkov
(Texas A&M)
J. Andresen
(Fermilab, Batavia)
J. Chramowicz
(Fermilab, Batavia)
J. Cumalat
(University of Colorado)
J. Ngadiuba
(INFN e Universita' di Milano)
K. Arndt
(Purdue University)
L. Moroni
(INFN Milano)
L. Perera
(University of Missisipi)
L. Uplegger
(Fermilab, Batavia)
M. Boscardin
(FBK, Trento)
M. Bubna
(Purdue University)
M. Povoli
(INFN e Universita' di Trento)
N. Tran
(Fermilab, Batavia)
O. Koybasi
(Purdue University)
P. Tan
(Fermilab, Batavia)
R. Brosius
(SUNY)
R. Horisberger
(Paul Scherrer Institute (PSI), Switzerland)
R. Rivera
(Fermilab, Batavia)
S. Kwan
(Fermilab, Batavia)
S. Terzo
(INFN e Universita' di Milano)
S. Wagner
(University of Colorado)
W. Erdmann
(Paul Scherrer Institute (PSI), Switzerland)
