Results 1 - 10 of 3150
Results 1 - 10 of 3150. Search took: 0.047 seconds
|Sort by: date | relevance|
[en] At PANDA, which is being planned at the international accelerator facility FAIR in Darmstadt, silicon strip sensors will play an important role for the micro vertex detector (MVD). The design of the micro-strip sensor modules is a process of hardware and software development, which is combined with simulation studies to compare the results. Therefore a test station was set up and first module prototypes have been constructed and tested. Data from sensor modules with single and double sided readout are available to make first hit recognition and tracking analysis. Database structures have been developed to collect sensor and frontend characteristics for assembled sensor modules.
[en] While module mass production has started in 2004, the detector construction has entered its hot phase this Spring. The silicon modules are assembled onto substructures, which in turn are integrated into the end cap structures. The detector design, the challenges and experiences of a silicon module mass production of unprecedented scale, the status of the integration of modules onto the detector substructures are introduced as well as the construction and integration of the end cap structures. The excellent performance of the substructures as observed in system tests and test beam experiments are presented
[en] The anti PANDA-experiment will be one of the main experiments inside the upcoming Facility for Antiproton and Ion Research (FAIR) at the GSI in Darmstadt. The fixed target experiment will explore bar pp annihilation in the charm mass region with intense, phase space cooled beams with momenta between 1.5 and 15 GeV/c. The innermost subdetector of anti PANDA will be the Micro Vertex Detector (MVD) and consists of silicon strip and pixel detectors. In order to operate and test the first trapezoidal strip sensor prototypes of the MVD, they are characterized with a probestation as well as with a dedicated testboard. Furthermore, the existing Juelich Digital Readout System has to be modified for the trapezoidal sensors. In this poster the adaption of the Juelich Digital Readout System for the trapezoidal silicon strip sensors as well as their characterization are presented.
[en] The CDFII silicon detector consists of 8 layers of double-sided silicon micro-strip sensors totaling 722,432 readout channels, making it one of the largest silicon detectors in present use by an HEP experiment. After nearly 2 years of data taking, we report on our experience operating the complex device. The performance of the CDFII silicon detector is presented and its effect on physics analyses is discussed. The CDFII silicon detector has begun to show measurable effects of radiation damage. These results and their impact on the expected lifetime of the detector are briefly reviewed
[en] The two main limiting factors in the accuracy of an optomechanical position monitoring system based on laser sources and photosensors are mechanical transfer between the monitored imaging sensors to the active particle tracking elements and non-straight propagation of the reference laser lines. Laser based alignment systems of Si trackers that use their own tracking detectors as photosensors are not affected by the first factor. Improving the transmittance of Si to infrared beams certainly minimizes the second one. Simulation of the passage of a light beam through a real microstrip detector and analysis of first measurements of samples are presented in this paper.
[en] The PANDA-experiment will be one of the main experiments inside the upcoming Facility for Antiproton and Ion Research (FAIR) at the GSI in Darmstadt. The fixed target experiment will explore pp annihilation in the charm mass region with intense, phase space cooled beams with momenta between 1.5 and 15 GeV/c. The innermost subdetector of PANDA will be the Micro Vertex Detector (MVD) and consists of silicon strip and pixel detectors. In order to operate and test the first trapezoidal strip sensor prototypes of the MVD, a readout system has to be prepared. Therefore a supply board, an ADC-card and sensor board for the trapezoidal strip sensors are necessary to operate the sensors together with the existing Juelich Digital Readout System. In this talk the adaption of the Juelich Digital Readout System for the trapezoidal silicon strip sensors is presented.
[en] Position sensitive segmented silicon detectors in the form of strips or pixels are being widely used in high energy particle physics and nuclear physics experiments. Considering the requirement of nuclear physics experiments in India and the GASPARD Experiment at the upcoming SPIRAL2 facility at GANIL, France, Electronics Division (ED), BARC initiated the indigenous development of large area (∼ 40 cm2 ) double sided silicon strip detectors (DSSD). As per the specifications provided by Nuclear Physics Division (NPD), BARC, the detectors were designed (64 strips with a pitch of 0.9 mm) and fabricated. The design, fabrication and static characterization details of the indigenously developed DSSDs have been earlier presented. The performance of the DSSDs has been recently studied with charged particles in collaboration with NPD, BARC. The results of this performance study are presented in this paper
[en] The CBM experiment will investigate the properties of nuclear matter at extreme conditions created in ultrarelativistic heavy-ion collisions. Its key detector - the Silicon Tracking System (STS) - will reconstruct particle tracks with momentum resolution of ∝1% and charged particle multiplicity up to 600 within the detector aperture covering the polar angle between 2.5 "c"i"r"c"l"e and 25 "c"i"r"c"l"e. High track density as well as stringent requirements to the momentum resolution require system with high channel granularity and low material budget. The STS will be constructed of about 1300 double-sided silicon microstrip detectors with total area of ∝4 m"2 and have 2.1 million channels. The microstrip sensors with 58 μm pitch and 62 x 62 mm"2 area will have pad size of 180 x 60 μm"2. Due to the large size, the CBM microstrip sensors are not well suited for the characterization at conventional probe stations. Therefore, a custom probe station is being developed at Tuebingen University. One of the main requirements is a repeatability better than 1 μm to allow an automatic successive positioning on all 1024 pads of a sensor. The construction of the probestation and first measurements will be presented.
[en] To be able to deliver satisfactory tracking performance after the LHC High Luminosity upgrade, the ATLAS inner detector will be replaced during Long Shutdown 3 with a new all-silicon-detector, the Inner Tracker (ITk), featuring pixel and strip sensors. Modules for the strip endcaps will be produced in Dortmund. One endcap consists out of six disks and each disk will be populated by 32 petals. Each petal will include six different module designs. The necessary preparations for production as well as the assembly and testing of modules are presented.