Experiments at storage ring light sources as well as at next-generation light sources increasingly require detectors capable of high dynamic range operation, combining low-noise detection of single photons with large pixel well depth. XFEL sources in particular provide pulse intensities sufficiently high that a purely photon-counting approach is impractical. The High Dynamic Range Pixel Array Detector (HDR-PAD) project aims to provide a dynamic range extending from single-photon sensitivity to 106 photons/pixel in a single XFEL pulse while maintaining the ability to tolerate a sustained flux of 1011 ph/s/pixel at a storage ring source. Achieving these goals involves the development of fast pixel front-end electronics as well as, in the XFEL case, leveraging the delayed charge collection due to plasma effects in the sensor. A first prototype of essential electronic components of the HDR-PAD readout ASIC, exploring different options for the pixel front-end, has been fabricated. Here, the HDR-PAD concept and preliminary design will be described.

1.
H. T.
Philipp
 et al,
Nucl. Instr. Meth. Phys. Res., Sect. A
649
,
67
69
(
2011
).
2.
B.
Henrich
 et al,
Nucl. Instr. Meth. Phys. Res., Sect. A
633
,
S11
S14
(
2011
).
3.
M.
Hart
 et al,
Nuclear Science Symposium and Medical Imaging Conference, 2012 IEEE
534
537
(
2012
).
4.
M.
Porro
 et al,
Nucl. Instr. Meth. Phys. Res., Sect. A
624
,
509
519
(
2010
).
5.
J.
Becker
, “
Signal development in silicon sensors used for radiation detection
,” Ph.D. thesis,
University of Hamburg
2010
.
6.
J. T.
Weiss
 et al,
SRI 2015 Conference Proceedings
(
2015
).
7.
D.
Schuette
, “
A mixed analog and digital pixel array detector for synchrotron x-ray imaging
,” Ph.D. thesis,
Cornell University
2008
.
8.
M.
Tate
 et al,
Journal of Physics: Conference Series
425
, p.
062004
(
2013
).
9.
K.
Giewekemeyer
 et al,
J. Synchrotron Radiation
21
,
1167
1174
(
2014
).
10.
A. J.
López-Martín
 et al,
IEEE Journal of Solid-State Circuits
40
(
2005
).
11.
L.
Bombelli
 et al,
Nucl. Instr. Meth. Phys. Res., Sect. A
624
,
360
366
(
2010
).
12.
L.
Ratti
 et al,
Nucl. Instr. Meth. Phys. Res., Sect. A
796
,
2
7
(
2015
).
This content is only available via PDF.