From: Michael Wiebusch Date: Tue, 26 May 2015 11:41:11 +0000 (+0200) Subject: added abstract for TWEPP15 by P.Klaus and M.Wiebusch X-Git-Url: https://jspc29.x-matter.uni-frankfurt.de/git/?a=commitdiff_plain;ds=sidebyside;p=conferences.git added abstract for TWEPP15 by P.Klaus and M.Wiebusch --- diff --git a/2015-twepp-klaus-wiebusch-MVD-electronics/abstract.txt b/2015-twepp-klaus-wiebusch-MVD-electronics/abstract.txt new file mode 100644 index 0000000..bd7b0c6 --- /dev/null +++ b/2015-twepp-klaus-wiebusch-MVD-electronics/abstract.txt @@ -0,0 +1,81 @@ +Conference: TWEPP 2015 - Topical Workshop on Electronics for Particle Physics + +Submitted by: KLAUS, Philipp + +Submitted on: 30 April 2015 21:24 + +Title: Design and Electronics of the CBM Micro-Vertex-Detector + +Abstract Content +Reconstructing Open-Charm Particles with the CBM-Experiment requires an ultra-light +Micro Vertex Detector (MVD) using CMOS Monolithic Active Pixel Sensors. +These sensors have unique properties concerning spatial resolution, radiation hardness, +and material budget. A full read-out chain was designed and prototyped, +comprising a multi-purpose FPGA platform and specialized front-end electronics. +A commercially available very thin single-layer flex cable will be used as electrical +connections to the sensors. We are going to give an overview on the detector concept +for the MVD including our latest results from building a full sized prototype of one quadrant. + +Summary +The Compressed Baryonic Matter (CBM) experiment will be located at the SIS100/300 +heavy ion synchrotron of the FAIR facility in Darmstadt. The fixed target experiment will +study the phase diagram of nuclear matter in the region of highest net baryon densities by +means of rare probes like di-electrons and open charm. The Micro Vertex Detector +(MVD) in close proximity to the target will allow to reconstruct +open charm particles by measuring their decay topology. +In addition, the MVD will help to reject electrons generated in $\gamma \rightarrow e^++ e^-$ conversions and +such reduce the background of the di-electrons. + +To fulfill its task, the four stations of the MVD have to combine an ultra-light material +budget ($0.3 \%\ X_0$ for the first and $0.5 \%\ X_0$ for subsequent stations) with a +spatial hit resolution of $\sim 5~\mu m$. Moreover, vacuum operation and a high rate +capability for $100\ \mathrm{kHz}$ Au+Au collisions are required. + +Being placed only 5 cm away from the target, the sensors have to endure $\sim 10^{13}\ \mathrm{n}_{eq}/cm^2$ non-ionizing and $ 3\ \mathrm{Mrad}$ ionizing radiation. +These requirements can be met +by CMOS Monolithic Active Pixel Sensors (MAPS). +The strict material budget constraints require special care also with respect to support and cooling materials as well +as electrical connections. The latter contribute significantly +to the material budget of the stations. Therefore, the material budget of those cables was +minimized by pushing commercial copper technology to its limits and a material budget +of $0.05 \%~X_0$ was reached. Carriers made of industrial CVD diamond or +thermal pyrolytic graphite (TPG) will be employed as support structures. + +As the final sensors are not yet available, the MVD is being prototyped based on the MIMOSA-26AHR sensor, which was +developed by the PICSEL group of the IPHC Strasbourg. A total of 15 sensors +will be placed on both sides of the carrier, +forming a full quadrant of one station of the final vertex detector. + +All supply electronics for the sensors are placed on a so-called converter board, located at about 50~cm distance +from the sensors. Therefore, it is supplemented by a passive front-end board dedicated to voltage stabilization and filtering. +In addition to remote controlled power supplies, signal switches and drivers, the converter boards feature an ADC section +to monitor the sensors' momentary electrical parameters. +The read-out and control system employs the TRB3-FPGA-board, which was initially +developed for HADES and is now used by several experimental groups at FAIR and other institutes. + +The firmware and software of the fully scalable prototype +include error recognition, status monitors and the necessary +slow and fast control features for controlling a full size detector system. + +The contribution introduces the concept of the +readout system of the MVD and discusses our solutions for matching the +demanding constraints of the physics mission of the CBM experiment. + +Primary Authors: +Mr. KLAUS, Philipp (Goethe Universität, Frankfurt) +Mr. WIEBUSCH, Michael (Goethe Universität, Frankfurt) + +Co-authors: +Dr. MÜNTZ, Christian (Goethe Universität, Frankfurt) +Dr. MICHEL, Jan (Goethe Universität, Frankfurt) +Dr. DEVEAUX, Michael (Goethe Universität, Frankfurt) +Prof. STROTH, Joachim (Goethe Universität and GSI) + +Abstract presenters: +Mr. KLAUS, Philipp +Mr. WIEBUSCH, Michael + +Track classification: +Power + +Presentation type: Poster \ No newline at end of file diff --git a/2015-twepp-klaus-wiebusch-MVD-electronics/my-abstracts.pdf b/2015-twepp-klaus-wiebusch-MVD-electronics/my-abstracts.pdf new file mode 100644 index 0000000..39a1431 Binary files /dev/null and b/2015-twepp-klaus-wiebusch-MVD-electronics/my-abstracts.pdf differ