5,282 research outputs found
Alignment of the ZEUS micro-vertex detector
No full textThe Micro-Vertex Detector (MVD) represents one of the major upgrades of the ZEUS detector for run II of the HERA ep collider at DESY. The MVD is a high-resolution silicon strip vertex detector designed to greatly enhance the tagging capabilities for event signatures with long-lived particles. This article describes the concepts and methods of theMVDalignment, and summarizes the experience from their application in context with real data from the HERA-II run
Alignment and calibration experience under LHC data-taking conditions in the CMS experiment
No full textFull achievement of the physics potential of the detector and timely
preparation of results for conferences require a fast turnaround of
alignment and calibration workflows. The CMS experiment has set up a
powerful framework and infrastructure for alignment and calibration,
which is based on dedicated skims providing a highly compact specific
input for the various workflows computing the constants, and includes
a prompt calibration concept which allows determination of highly
time-dependent constants on the fly. The CMS alignment and calibration
model has been commissioned step by step with cosmic muons and passed
a main challenge with the first LHC high energy run and the
preparation of physics results for the summer conferences of this
year. This article reviews detailed experience from this extended
operation, including results from selected workflows
A concurrent track evolution algorithm for pattern recognition in the HERA-B main tracking system
No full textA strategy for pattern recognition in the main tracking system of a forward B spectrometer like HERA-B or LHC-B is presented. Intrinsically a local method, it combines the virtues of track following procedures with the necessary ability to optimize between many available paths in a high occupancy environment. A hit-locating procedure suitable for a multiplanar detector geometry has been developed. The performance of the method is tested on HERA-B Monte Carlo events with full detector simulation and a realistic spectrometer geometry
Potential Use of Bio-Oleogel as Phase Change Material
No full textTwo bio-oleogels were investigated. These materials were produced with a combination of canola and soybean oil with 4, 6, 8, and 10% of beeswax (by weight). Sensible heat storage capacity, melting parameters, and enthalpies were investigated by the differential scanning calorimetry (DSC) test. An ordinary DSC dynamic test was performed. Cycles of heating and cooling were performed, as well as tests with different heating rates. According to the results, the materials present a melting temperature between −16 to −12 °C and a total latent heat between 22.9 and 367.6 J/g. BC10 (canola oil with 10% beeswax) was the sample with the best performance, with a latent heat of 367.6 J/g and a melting temperature of −13.6 °C, demonstrating its possible use as a phase change material for cold storage
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