Article

Performance of a DEPFET prototype module for the ILC vertex detector

Phys. Inst., Bonn Univ., Germany
IEEE Transactions on Nuclear Science (Impact Factor: 1.22). 07/2006; DOI: 10.1109/TNS.2006.873079
Source: IEEE Xplore

ABSTRACT For the detection of secondary vertices of long lived bottom and charm quarks at the proposed International Linear Collider (ILC) a DEPFET pixel detector is one of the favored technology options. DEPFET pixel sensors, in which the amplifying transistor structure is contained in the pixel cell itself on a fully depleted bulk, are unique devices in terms of their large signal and low noise capability and their obtainable spatial resolution with very thin detectors. DEPFET pixel prototype modules with close to ILC specifications have been tested in the laboratory and, for the first time, in a 6 GeV electron test beam. The different noise sources have been calculated and compared with the measured value of ENC≈225 e- for the entire readout chain.

0 Bookmarks
 · 
122 Views
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: DEPFET pixels offer a unique possibility for a high resolution pixel vertex detector at a future linear collider (ILC) experiment. The key idea of DEPFET sensors is the integration of amplifying transistors into a fully depleted bulk. The excellent noise performance obtained through the low input capacitance in combination with the full signal from the depleted bulk leads to a large S/N ratio. The sensor itself can therefore be made very thin (50mm) without loss of efficiency. In this article the progress of the DEPFET development towards an ILC vertex detector is presented. Properties of prototype matrices and dedicated ASIC electronics have been characterized in various laboratory and test beam measurements. In particular a point resolution of less than 2 mm has been demonstrated (using 450 mm thick sensors). Based on these results larger matrices, improved readout and control electronics have been designed which are presently in production. In parallel software was developed to simulate the performance of a DEPFET based vertex detector in an ILC experiment.
    01/2009;
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: This document is motivated by the need of clarification of possible interference between the operation of PETRA III and the DESY test beam. The document is intended to describe shortly the DESY test beam performance and the expected conditions after the start-up of PETRA III. We evaluate the possible impact of PE- TRA III on the availability, the intensity, and the energy of the electrons/positrons provided to the test beam lines at DESY II. In the interest of a very large com- munity of test beam users we intend to identify, and eventually resolve, possible conflicts between the two main programs of the DESY II machine, namely the filling of PETRA III and DORIS and the beam delivery to test beam facilities.
  • [Show abstract] [Hide abstract]
    ABSTRACT: An upgrade of the successful asymmetric e+e− collider in KEK (Tsukuba, Japan) is foreseen by the fall of 2013. This new Super Flavor Factory will deliver an increased instantaneous luminosity of up to L=8×1035cm−2s−1, 40 times larger than the current KEKB machine. To exploit these new conditions and provide high precision measurements of the decay vertex of the B meson systems, a new silicon vertex detector will be operated in Belle. This new detector will consist of two layers of DEPFET Active Pixel Sensors as close as possible to the interaction point.DEPFET is a field effect transistor, with an additional deep implant underneath the channel's gate, integrated on a completely depleted bulk. This technology offers detection and an in-pixel amplification stage, while keeping low the power consumption. Under these conditions, thin sensors with small pixel size and low intrinsic noise are possible.In this article, an overview of the full system will be described, including the sensor, the front-end electronics and both the mechanical and thermal proposed solutions as well as the expected performance.
    Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 09/2011; 650(1):59-63. · 1.14 Impact Factor

Full-text (2 Sources)

Download
7 Downloads
Available from
Jun 8, 2014