Angelo Dragone - Academia.edu (original) (raw)

Papers by Angelo Dragone

Research paper thumbnail of Reference Voltage Buffer for Hybrid RC-DAC SAR ADCs in 130 nm CMOS Process

2021 IEEE International Symposium on Circuits and Systems (ISCAS)

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Basic Research Needs for High Energy Physics Detector Research Development: Report of the Office of Science Workshop on Basic Research Needs for HEP Detector Research and Development: December 11-14, 2019

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The ePix10k 2-megapixel hard X-ray detector at LCLS

Journal of Synchrotron Radiation

The ePix10ka2M (ePix10k) is a new large area detector specifically developed for X-ray free-elect... more The ePix10ka2M (ePix10k) is a new large area detector specifically developed for X-ray free-electron laser (XFEL) applications. The hybrid pixel detector was developed at SLAC to provide a hard X-ray area detector with a high dynamic range, running at the 120 Hz repetition rate of the Linac Coherent Light Source (LCLS). The ePix10k consists of 16 modules, each with 352 × 384 pixels of 100 µm × 100 µm distributed on four ASICs, resulting in a 2.16 megapixel detector, with a 16.5 cm × 16.5 cm active area and ∼80% coverage. The high dynamic range is achieved with three distinct gain settings (low, medium, high) as well as two auto-ranging modes (high-to-low and medium-to-low). Here the three fixed gain modes are evaluated. The resulting dynamic range (from single photon counting to 10000 photons pixel−1 pulse−1 at 8 keV) makes it suitable for a large number of different XFEL experiments. The ePix10k replaces the large CSPAD in operation since 2011. The dimensions of the two detectors a...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Detector program for the LCLS complex

Acta Crystallographica Section A Foundations and Advances, 2014

Over five years of operation the Linac Coherent Light Source has helped established free-electron... more Over five years of operation the Linac Coherent Light Source has helped established free-electron lasers as a radically new paradigm for x-ray-based science. Part of this has been the demonstration of novel experimental techniques and the qualification of established methods in the LCLS environment. To take full advantage of this machine, a complimentary suite of detectors must be made available to scientists. Progress towards this goal will be described along with experience gained from operating within the LCLS environment. The status of currently installed detectors as well as future plans will be presented.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Flip Chip Assembly of Thin Substrates, Fine Bump Pitch, and Small Prototype Die

Bump bond assembly of sensors and circuit chips is often a critical step for detector projects, a... more Bump bond assembly of sensors and circuit chips is often a critical step for detector projects, and yet it can be expensive, time consuming, and carry high technical risk. In particular bump formation on singulated die, as obtained on multi-project wafer runs, is difficult due to the hydrodynamics of resist coating and handling of small parts. An increasing number of science applications need thin substrates for reasons such as increased speed of charge collection or reduction of mass to reduce multiple scattering, and there is always a demand for finer bump pitches. SLAC is involved in many challenging detector development efforts for particle physics, astrophysics, and the photon sciences and most of these require hybridization of small, prototype dies from multi-project wafer runs. Results on process development on bump deposition and bonding of thin substrates, small area chips, and chips with small bump-to-bump spacing will be described.

Bookmarks Related papers MentionsView impact

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

Advances in X-ray Free-Electron Lasers Instrumentation III, 2015

Bookmarks Related papers MentionsView impact

Research paper thumbnail of ePix: A class of front-end ASICs for second generation LCLS integrating hybrid pixel detectors

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC), 2013

Bookmarks Related papers MentionsView impact

Research paper thumbnail of X-ray detectors at the Linac Coherent Light Source

Journal of Synchrotron Radiation, 2015

Free-electron lasers (FELs) present new challenges for camera development compared with conventio... more Free-electron lasers (FELs) present new challenges for camera development compared with conventional light sources. At SLAC a variety of technologies are being used to match the demands of the Linac Coherent Light Source (LCLS) and to support a wide range of scientific applications. In this paper an overview of X-ray detector design requirements at FELs is presented and the various cameras in use at SLAC are described for the benefit of users planning experiments or analysts looking at data. Features and operation of the CSPAD camera, which is currently deployed at LCLS, are discussed, and the ePix family, a new generation of cameras under development at SLAC, is introduced.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The PDD ASIC: Highly Efficient Energy and Timing Extraction for High-Rate Applications

IEEE Nuclear Science Symposium Conference Record, 2005, 2005

The peak detector derandomizer ASIC provides threshold discrimination, arbitration, peak and timi... more The peak detector derandomizer ASIC provides threshold discrimination, arbitration, peak and timing detection with analog memory, sparsification, and multiplexing for 32 input channels of analog pulse data. In this work the ASIC is characterized for high-rate operation. A new version of the ASIC, can process multiple events occurring at the same time and provides time-over-threshold measurement for pile up rejection.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Forward instrumentation for ILC detectors

Journal of Instrumentation, 2010

Bookmarks Related papers MentionsView impact

Research paper thumbnail of ASIC With Multiple Energy Discrimination for High-Rate Photon Counting Applications

IEEE Transactions on Nuclear Science, 2000

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Noise in Charge Amplifiers—A <formula formulatype="inline"> <tex Notation="TeX">$g_{m}/I_{D}$</tex></formula> Approach

IEEE Transactions on Nuclear Science, 2000

ABSTRACT Charge amplifiers represent the standard solution to amplify signals from capacitive det... more ABSTRACT Charge amplifiers represent the standard solution to amplify signals from capacitive detectors in high energy physics experiments. In a typical front-end, the noise due to the charge amplifier, and particularly from its input transistor, limits the achievable resolution. The classic approach to attenuate noise effects in MOSFET charge amplifiers is to use the maximum power available, to use a minimum-length input device, and to establish the input transistor width in order to achieve the optimal capacitive matching at the input node. These conclusions, reached by analysis based on simple noise models, lead to sub-optimal results. In this work, a new approach on noise analysis for charge amplifiers based on an extension of the gm/ID methodology is presented. This method combines circuit equations and results from SPICE simulations, both valid for all operation regions and including all noise sources. The method, which allows to find the optimal operation point of the charge amplifier input device for maximum resolution, shows that the minimum device length is not necessarily the optimal, that flicker noise is responsible for the non-monotonic noise versus current function, and provides a deeper insight on the noise limits mechanism from an alternative and more design-oriented point of view.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of BeamCal Instrumentation IC: Design, Implementation, and Test Results

IEEE Transactions on Nuclear Science, 2000

ABSTRACT The BeamCal detector, one of the calorimeters in the forward region of the International... more ABSTRACT The BeamCal detector, one of the calorimeters in the forward region of the International Linear Collider detector, will serve three purposes: ensure hermeticity of the detector for small polar angles, reduce the backscattering from pairs into the detector center, and provide a low-latency signal for beam diagnostics. The BeamCal specifications in terms of noise suppression, signal charge, pulse rate and occupancy pose unique challenges in the front-end and readout electronics design. The Bean - BeamCal Instrumentation IC - is a 32-channel front-end and readout IC that will address the BeamCal instrumentation requirements. By employing switched-capacitor filters and a slow reset-release technique, the Bean will process the signal charge at the International Linear Collider pulse rate. Each channel will have a 10-bit successive approximation analog-to-digital converter and digital memory for readout purposes. The Bean will also feature a fast feedback adder, capable of providing an 8-bit, low-latency output for beam diagnostic purposes. This work presents the design and characterization of the Bean prototype, a 3-channel IC that proves the principle of operation described.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Tuning of High-Speed Telecommunication Filters, via I/O Cross-Correlation Evaluation

IEEE Transactions on Circuits and Systems I: Regular Papers, 2000

Continuous-time (CT) filters are widely used in signal processing but, owing to the large spread ... more Continuous-time (CT) filters are widely used in signal processing but, owing to the large spread in the process parameters which determine their time constants, they require a tuning system to align their frequency characteristics. Several techniques have already been proposed in the literature and are commonly employed, but usually they require either a doubling of the filter circuitry or some

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Readout ASIC for 3D Position-Sensitive Detectors

IEEE Transactions on Nuclear Science, 2000

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Reference Voltage Buffer for Hybrid RC-DAC SAR ADCs in 130 nm CMOS Process

2021 IEEE International Symposium on Circuits and Systems (ISCAS)

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Basic Research Needs for High Energy Physics Detector Research Development: Report of the Office of Science Workshop on Basic Research Needs for HEP Detector Research and Development: December 11-14, 2019

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The ePix10k 2-megapixel hard X-ray detector at LCLS

Journal of Synchrotron Radiation

The ePix10ka2M (ePix10k) is a new large area detector specifically developed for X-ray free-elect... more The ePix10ka2M (ePix10k) is a new large area detector specifically developed for X-ray free-electron laser (XFEL) applications. The hybrid pixel detector was developed at SLAC to provide a hard X-ray area detector with a high dynamic range, running at the 120 Hz repetition rate of the Linac Coherent Light Source (LCLS). The ePix10k consists of 16 modules, each with 352 × 384 pixels of 100 µm × 100 µm distributed on four ASICs, resulting in a 2.16 megapixel detector, with a 16.5 cm × 16.5 cm active area and ∼80% coverage. The high dynamic range is achieved with three distinct gain settings (low, medium, high) as well as two auto-ranging modes (high-to-low and medium-to-low). Here the three fixed gain modes are evaluated. The resulting dynamic range (from single photon counting to 10000 photons pixel−1 pulse−1 at 8 keV) makes it suitable for a large number of different XFEL experiments. The ePix10k replaces the large CSPAD in operation since 2011. The dimensions of the two detectors a...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Detector program for the LCLS complex

Acta Crystallographica Section A Foundations and Advances, 2014

Over five years of operation the Linac Coherent Light Source has helped established free-electron... more Over five years of operation the Linac Coherent Light Source has helped established free-electron lasers as a radically new paradigm for x-ray-based science. Part of this has been the demonstration of novel experimental techniques and the qualification of established methods in the LCLS environment. To take full advantage of this machine, a complimentary suite of detectors must be made available to scientists. Progress towards this goal will be described along with experience gained from operating within the LCLS environment. The status of currently installed detectors as well as future plans will be presented.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Flip Chip Assembly of Thin Substrates, Fine Bump Pitch, and Small Prototype Die

Bump bond assembly of sensors and circuit chips is often a critical step for detector projects, a... more Bump bond assembly of sensors and circuit chips is often a critical step for detector projects, and yet it can be expensive, time consuming, and carry high technical risk. In particular bump formation on singulated die, as obtained on multi-project wafer runs, is difficult due to the hydrodynamics of resist coating and handling of small parts. An increasing number of science applications need thin substrates for reasons such as increased speed of charge collection or reduction of mass to reduce multiple scattering, and there is always a demand for finer bump pitches. SLAC is involved in many challenging detector development efforts for particle physics, astrophysics, and the photon sciences and most of these require hybridization of small, prototype dies from multi-project wafer runs. Results on process development on bump deposition and bonding of thin substrates, small area chips, and chips with small bump-to-bump spacing will be described.

Bookmarks Related papers MentionsView impact

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

Advances in X-ray Free-Electron Lasers Instrumentation III, 2015

Bookmarks Related papers MentionsView impact

Research paper thumbnail of ePix: A class of front-end ASICs for second generation LCLS integrating hybrid pixel detectors

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC), 2013

Bookmarks Related papers MentionsView impact

Research paper thumbnail of X-ray detectors at the Linac Coherent Light Source

Journal of Synchrotron Radiation, 2015

Free-electron lasers (FELs) present new challenges for camera development compared with conventio... more Free-electron lasers (FELs) present new challenges for camera development compared with conventional light sources. At SLAC a variety of technologies are being used to match the demands of the Linac Coherent Light Source (LCLS) and to support a wide range of scientific applications. In this paper an overview of X-ray detector design requirements at FELs is presented and the various cameras in use at SLAC are described for the benefit of users planning experiments or analysts looking at data. Features and operation of the CSPAD camera, which is currently deployed at LCLS, are discussed, and the ePix family, a new generation of cameras under development at SLAC, is introduced.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The PDD ASIC: Highly Efficient Energy and Timing Extraction for High-Rate Applications

IEEE Nuclear Science Symposium Conference Record, 2005, 2005

The peak detector derandomizer ASIC provides threshold discrimination, arbitration, peak and timi... more The peak detector derandomizer ASIC provides threshold discrimination, arbitration, peak and timing detection with analog memory, sparsification, and multiplexing for 32 input channels of analog pulse data. In this work the ASIC is characterized for high-rate operation. A new version of the ASIC, can process multiple events occurring at the same time and provides time-over-threshold measurement for pile up rejection.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Forward instrumentation for ILC detectors

Journal of Instrumentation, 2010

Bookmarks Related papers MentionsView impact

Research paper thumbnail of ASIC With Multiple Energy Discrimination for High-Rate Photon Counting Applications

IEEE Transactions on Nuclear Science, 2000

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Noise in Charge Amplifiers—A <formula formulatype="inline"> <tex Notation="TeX">$g_{m}/I_{D}$</tex></formula> Approach

IEEE Transactions on Nuclear Science, 2000

ABSTRACT Charge amplifiers represent the standard solution to amplify signals from capacitive det... more ABSTRACT Charge amplifiers represent the standard solution to amplify signals from capacitive detectors in high energy physics experiments. In a typical front-end, the noise due to the charge amplifier, and particularly from its input transistor, limits the achievable resolution. The classic approach to attenuate noise effects in MOSFET charge amplifiers is to use the maximum power available, to use a minimum-length input device, and to establish the input transistor width in order to achieve the optimal capacitive matching at the input node. These conclusions, reached by analysis based on simple noise models, lead to sub-optimal results. In this work, a new approach on noise analysis for charge amplifiers based on an extension of the gm/ID methodology is presented. This method combines circuit equations and results from SPICE simulations, both valid for all operation regions and including all noise sources. The method, which allows to find the optimal operation point of the charge amplifier input device for maximum resolution, shows that the minimum device length is not necessarily the optimal, that flicker noise is responsible for the non-monotonic noise versus current function, and provides a deeper insight on the noise limits mechanism from an alternative and more design-oriented point of view.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of BeamCal Instrumentation IC: Design, Implementation, and Test Results

IEEE Transactions on Nuclear Science, 2000

ABSTRACT The BeamCal detector, one of the calorimeters in the forward region of the International... more ABSTRACT The BeamCal detector, one of the calorimeters in the forward region of the International Linear Collider detector, will serve three purposes: ensure hermeticity of the detector for small polar angles, reduce the backscattering from pairs into the detector center, and provide a low-latency signal for beam diagnostics. The BeamCal specifications in terms of noise suppression, signal charge, pulse rate and occupancy pose unique challenges in the front-end and readout electronics design. The Bean - BeamCal Instrumentation IC - is a 32-channel front-end and readout IC that will address the BeamCal instrumentation requirements. By employing switched-capacitor filters and a slow reset-release technique, the Bean will process the signal charge at the International Linear Collider pulse rate. Each channel will have a 10-bit successive approximation analog-to-digital converter and digital memory for readout purposes. The Bean will also feature a fast feedback adder, capable of providing an 8-bit, low-latency output for beam diagnostic purposes. This work presents the design and characterization of the Bean prototype, a 3-channel IC that proves the principle of operation described.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Tuning of High-Speed Telecommunication Filters, via I/O Cross-Correlation Evaluation

IEEE Transactions on Circuits and Systems I: Regular Papers, 2000

Continuous-time (CT) filters are widely used in signal processing but, owing to the large spread ... more Continuous-time (CT) filters are widely used in signal processing but, owing to the large spread in the process parameters which determine their time constants, they require a tuning system to align their frequency characteristics. Several techniques have already been proposed in the literature and are commonly employed, but usually they require either a doubling of the filter circuitry or some

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Readout ASIC for 3D Position-Sensitive Detectors

IEEE Transactions on Nuclear Science, 2000

Bookmarks Related papers MentionsView impact