HyPix-Arc 150°
El HyPix-Arc 150° es un detector de rayos X híbrido de conteo de fotones, curvo y único (HPC) para aplicaciones de difracción de monocristal. HyPix-Arc 150° tiene el rango más alto de 2θ en una sola posición disponible para el laboratorio casero. Recopile más datos en una sola exposición con menos distorsión del perfil de reflexión: HyPix-Arc 150° ofrece una completa cobertura angular de 150 grados. Esto es más que suficiente para recolectar datos completos de la difracción del monocristal, de acuerdo con las pautas de IUCr, incluso para la longitud de onda de rayos X de Cu Kα desde una sola posición theta. Los datos de ángulo alto y bajo se miden al mismo tiempo, bajo las mismas condiciones para una mejor escala, datos más rápidos y un tiempo de dosis reducido. Un detector curvo minimiza la distorsión pico al garantizar que, incluso a distancias cortas de cristal a detector, los haces difractados estén más cerca de la perpendicular de lo que es posible con una geometría plana.
Like all HPC detectors, the HyPix-Arc 150° offers direct X-ray photon counting for every photon, single pixel top-hat point spread function with no readout noise and no dark noise. The 100 micron pixel size allows better resolution of reflections for long unit cells as well as improving reflection profile analysis. The HyPix-Arc 150° has a high frame rate of 100 Hz, as well as a Zero Dead Time mode providing the ultimate in error-free shutterless data collection.
The advantage of direct detection found in the HyPix-Arc 150° is that no phosphor is required and the size of the pixel determines the point spread function rather than the blooming that occurs on detectors with a phosphor. This means that reflections are sharper and more easily resolved. Profile analysis will not require incorporating additional pixels to compensate for phosphor blooming leading to less experimental noise, such as air scatter, being incorporated into a reflection. As opposed to monolithic detectors, such as CMOS-based CPADs, a hybrid detector separates the detection area from the read-out electronics. This means that the full area of a pixel is sensitive to incoming X-ray photons, with the charge being transmitted through an indium bump bond to a secondary readout pixel. In APS-CMOS/CPAD detectors, each pixel contains in-pixel readout electronics that come at the expense of light sensitive area. Monolithic detectors used in crystallography often have a 30% dead area or detection-gap per pixel that occurs through the whole detector.
The HyPix-Arc 150° is the perfect detector for measuring diffraction from small and poorly diffracting samples due to the extremely low noise characteristics: you can count as long as you need to without the dark current or noise build up seen in other detectors. When your crystals diffract well, the high frame rate and Zero Dead Time mode mean that you can collect data extremely fast and accurately in a shutterless mode.
