A system of large-area position-sensitive multiwire proportional chambers, installed in the bottom of the central detector of the KASCADE experiment is able to observe the density distributions of extensive air shower components in the shower core. Using the method of multifractal moments, a mass sensitive parametrisation of the density distributions is given. In combination with additionally m...

Abstract Wafers of Tb-doped GdAlO 3 / ? -Al 2 O eutectic were fabricated by the micro-pulling-down method using an Ir crucible with a 25 × mm die. A prototype X-ray phase imaging detector was developed CMOS sensor fiber optic plate and wafer. spots 8.24 ? m period observed detector. nylon ball diameter 4 also carried out. It that change approximately occurs at air–nylon interface. This techniqu...

Positron emission tomography (PET) detectors with the ability to encode depth-of-interaction (DOI) information allow us to simultaneously improve the spatial resolution and sensitivity of PET scanners. In this study, we propose a DOI PET detector based on a stair-pattern reflector arrangement inserted between pixelated crystals and a single-ended scintillation light readout. The main advantage ...

The High Resolution Fly’s Eye (HiRes) experiment is a stereo air fluorescence detector for the study of cosmic rays with energies above 5×10 eV. Arrival directions of cosmic rays observed in stereo can be resolved with a typical uncertainty on the order of 0.5◦, making the experiment ideal for small-scale anisotropy studies. Here we present the results of searches for correlation with astronomi...

We describe the design and performance of IceTop, the air shower array on top of the IceCube neutrino detector. After the 2008/09 antarctic summer season both detectors are deployed at almost 3/4 of their design size. With the current IceTop 59 stations we can start the study of showers of energy well above 10 eV. The paper also describes the first results from IceTop and our plans to study the...

For large particles, the tail of the pulse is relatively long, and if a smaller particle passes through the sensor volume while the tail still elevates the detector voltage, the smaller particle may produce a pulse that exceeds the counting threshold for large particles . . . Because small particles in ambient air are much more numerous than large particles, it is the small particle concentrati...

We report carbon-nanotube-based electromechanical resonators with the fundamental mode frequency over 1.3 GHz, operated in air at room temperature. A new combination of drive and detection methods allows for unprecedented measurement of both oscillation amplitude and phase and elucidates the relative mobility of static charges near the nanotube. The resonator serves as an exceptionally sensitiv...