Speaker
Description
JUNGFRAU is a state-of-the-art charge integrating hybrid pixel detector developed for photon science applications at X-ray free-electron lasers (FELs) and synchrotrons. JUNGFRAU features three automatically switching gains per pixel, which allows both detection of individual 2 keV photons and a high dynamic range up to 104 12.4 keV photons at a frame rate up to 2.2 kHz. A JUNGFRAU single module consists of 8 readout chips, each containing 256 x 256 pixels with a 75 µm pitch. Arranged in a 2 x 4 array, they are typically bump bonded to a 320 µm thick silicon sensor, resulting in an active area of about 4 x 8 cm2 with 0.5M pixels. Currently, the newest version of the JUNGFRAU readout chip, JUNGFRAU 1.2, is undergoing characterization at the Paul Scherrer Institute. This updated ASIC version further optimizes the design of the pixel circuit and analog readout chain compared to its predecessors. The modifications are expected to improve the noise and output linearity. In this contribution, the results of the laboratory characterization as well as a full dynamic range scan with an X-ray beam at the SwissFEL Cristallina endstation will be presented.
| Workshop topics | Front-end electronics and readout |
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