Design and characterization of the ePix10k: a high dynamic range integrating pixel ASIC for LCLS detectors

ePix10k is a variant of a novel class of integrating pixel ASICs architectures optimized for the processing of signals in second generation LINAC Coherent Light Source (LCLS) X-Ray cameras. The ASIC is optimized for high dynamic range application requiring high spatial resolution and fast frame rates. ePix ASICs are based on a common platform composed of a random access analog matrix of pixel with global shutter, fast parallel column readout, and dedicated sigma-delta analog to digital converters per column. The ePix10k variant has 100um×100um pixels arranged in a 176×192 matrix, a resolution of 140e- r.m.s. and a signal range of 3.5pC (10k photons at 8keV). In its final version it will be able to sustain a frame rate of 2kHz. A first prototype has been fabricated and characterized. Performance in terms of noise, linearity, uniformity, cross-talk, together with preliminary measurements with bump bonded sensors are reported here.

[1]  M. Tripathi,et al.  KPiX, an array of self triggered charge sensitive cells generating digital time and amplitude information. , 2008, 2008 IEEE Nuclear Science Symposium Conference Record.

[2]  P. Caragiulo,et al.  eLine100: A Front End ASIC for LCLS Detectors in Low Noise Applications , 2012, IEEE Transactions on Nuclear Science.

[3]  B. Markovic,et al.  Characterization of the ePix10k camera at SSRL and LCLS , 2014, 2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC).

[4]  S. Herrmann,et al.  ePix: A class of front-end ASICs for second generation LCLS integrating hybrid pixel detectors , 2013, 2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC).

[5]  B. Markovic,et al.  2nd generation cameras for LCLS and the new challenges of high repetition rates at LCLS-II , 2014, 2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC).

[6]  G. Williams,et al.  The Cornell-SLAC pixel array detector at LCLS , 2012, 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC).

[7]  D. P. Siddons,et al.  eLine10k: A high dynamic range front-end ASIC for LCLS detectors , 2012, 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC).