A5060804856- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Advanced X-ray Imaging Techniques
- CCD and CMOS Imaging Sensors
- Medical Imaging Techniques and Applications
- Advancements in Semiconductor Devices and Circuit Design
- Advancements in Photolithography Techniques
- Advanced Electron Microscopy Techniques and Applications
- Analog and Mixed-Signal Circuit Design
- Radiation Effects in Electronics
- Particle Accelerators and Free-Electron Lasers
- Advanced X-ray and CT Imaging
- Neutrino Physics Research
- Low-power high-performance VLSI design
- Radio Frequency Integrated Circuit Design
- Crystallography and Radiation Phenomena
- Electron and X-Ray Spectroscopy Techniques
- Advanced Optical Sensing Technologies
- X-ray Spectroscopy and Fluorescence Analysis
- Laser-Matter Interactions and Applications
- Silicon and Solar Cell Technologies
- 3D IC and TSV technologies
- Photocathodes and Microchannel Plates
- Semiconductor Lasers and Optical Devices
- Neuroscience and Neural Engineering
Stanford University
2020-2023
SLAC National Accelerator Laboratory
2012-2021
Menlo School
2014-2019
University of Oxford
2016
Bellingham Technical College
2015
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 Linac Coherent Light Source (LCLS) and support wide range scientific applications. In this paper an overview X-ray detector design requirements at FELs is presented various cameras in use described benefit users planning experiments or analysts looking data. Features operation CSPAD camera, which currently...
Charge collection properties of particle detectors made in HV-CMOS technology were investigated before and after irradiation with reactor neutrons. Two different sensor types designed processed 180 350 nm by AMS. Edge-TCT charge measurements electrons from 90Sr source employed. Diffusion generated carriers undepleted substrate contributes significantly to the irradiation, while drift contribution prevails as shown at shaping times. The depleted region a given bias voltage was found grow...
ePix is a novel class of ASIC architectures, based on common platform, optimized to build modular scalable detectors for LCLS. The platform architecture composed random access analog matrix pixel with global shutter, fast parallel column readout, and dedicated sigma-delta analog-to-digital converters per column. It also implements control interface all the required support electronics perform configuration, calibration readout matrix. Based this front-end ASICs several camera modules,...
Free-electron lasers (FELs) made the imaging of atoms and molecules in motion possible, opening new science opportunities with high brilliance, ultra-short x-ray laser pulses at up to 120 Hz. Some or upgraded FEL facilities will operate greatly increased pulse rates (kHz MHz), presenting additional requirements on detection. We present ePix platform for detectors current status detectors: ePix100 low noise applications, ePix10k dynamic range ePixS spectroscopic applications. Then we...
This article presents a compact 2× time-interleaved switched-capacitor (SC) digital-to-analog converter (DAC) for digital-intensive transmitter architectures. To minimize area and to leverage the strengths of FinFET technology, implementation departs from traditional current steering approach consists mainly inverters sub-femtofarad SCs. The DAC's architecture is based on parallel charge redistribution separates level generation, pulse timing, output power generation. described 28-GS/s 8-bit...
ePix10K is a hybrid pixel detector developed at SLAC for demanding free-electron laser (FEL) applications, providing an ultrahigh dynamic range (245 eV to 88 MeV) through gain auto-ranging. It has three modes (high, medium and low) two auto-ranging (high-to-low medium-to-low). The first cameras are built around modules consisting of sensor flip-chip bonded 4 ASICs, resulting in 352 × 384 pixels 100 µm x each. We present results from extensive testing with FEL beams LCLS, measured noise floor...
The ePix100 x-ray camera is a new system designed and built at SLAC for experiments the Linac Coherent Light Source (LCLS). first member of family detectors around single hardware software platform, supporting variety front-end chips. With readout speed 120 Hz, matching LCLS repetition rate, noise lower than 80 e-rms pixels 50 µm × µm, this offers viable alternative to fast readout, direct conversion, scientific CCDs in imaging mode. detector, applications such as X-ray Photon Correlation...
A second generation camera system has been developed and built at SLAC for use in experiments the Linac Coherent Light Source (LCLS). The is around ePix family of hybrid pixel detectors, with a focus on modularity mechanical, electrical, data acquisition interfaces, allowing versatile that can be quickly reconfigured. first compact, 155 mm × 52 box, an active area up to 35 38 mm, recording full frames over 540 kpixel rates excess 120 Hz. allows fast debugging development, providing test...
The ePix100A camera is a 0.5 megapixel (704 x 768 pixels) for low noise x-ray detection applications requiring high spatial and spectral resolution. built around hybrid pixel detector consisting of 4 ePix100a ASICs ip-chip bonded to one sensor. pixels are 50 μm (active sensor size ~ 35:4mm 38:6 mm), with 180 eV rms, range 100 8 keV photons, current frame rate 240 Hz (with an upgrade path towards 10 kHz). This performance leads combining dynamic range, signal ratio, speed excellent linearity...
ePix is a novel class of ASICs architectures based on common platform optimized for the processing signals in second generation LCLS cameras. The architecture composed random access analog matrix pixels with global shutter, fast parallel column readout, and dedicated sigma-delta to digital converters per column. It also implements control interface all required support electronics perform configuration, calibration, readout matrix. Based this front-end several camera modules are under...
Since it began operations in 2009, the Linac Coherent Light Source (LCLS) has opened a new and dynamic frontier terms of light sources their associated science [1 John Arthur, Rev. Sci. Instrum. 73, 1393 (2002).[Crossref], [Web Science ®] , [Google Scholar], 2 C. Pellegrini J. Rosenzweig, NIMA 331(1–3), 223–227 (1993).[Crossref], Scholar]]. An increase brightness by factor billion over pre-existing synchrotrons, combination with ultra-brief pulses coherent X-rays, is ushering era photon...
This paper presents a data-compressive neural recording IC for single-cell resolution high-bandwidth brain-computer interfaces. The features wired-OR lossy compression during digitization, thus preventing data deluge and massive movement. By discarding unwanted baseline samples of the signals, output rate is reduced by 146× on average while allowing reconstruction spike samples. array consists pulse position modulation-based active digital pixels with global single-slope analog-to-digital...
eLine100 is a fast-frame 96-channel readout ASIC for SLAC Linac Coherent Light Source (LCLS) detectors. The circuit has been designed to integrate the charge from high-capacitance 2D sensors with rolling shutter and 1D sensors. It noise floor of 55e <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-</sup> + 8e /pF r.m.s at room temperature it suitable applications requiring resolutions on order 100e signals up 120 photons/pixel/pulse 8keV (260ke...
eLine100 is a fast-frame 96-channel readout ASIC for SLAC Linac Coherent Light Source (LCLS) detectors. The circuit has been designed to integrate the charge from high-capacitance 2D sensors with rolling shutter and 1D sensors. It noise floor of 55 e <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-</sup> + 8 /pF r.m.s. at room temperature it suitable applications requiring resolutions on order 100 signals up 120 photons/pixel/pulse keV ( 260 ke...
This paper presents a compact DAC for digital-intensive transmitter architectures. To minimize area and to leverage the strengths of FinFET CMOS, implementation departs from traditional current steering approach consists mainly inverters sub-femtofarad switched capacitors. The 14 GS/s 8-bit design occupies only 0.011 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> supports up 0.32 V <sub...
The eLine10k is a fast-frame, 64-channel readout ASIC for SLAC Linac Coherent Light Source (LCLS) detectors. circuit has been designed to integrate the charge from high-capacitance 2D sensors with rolling shutter and ID strip sensors. It suitable applications requiring large input signal range, on order of 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sup> photons/pixel/pulse at 8keV (22Me...
ePix10k is a variant of novel class integrating pixel ASICs architectures optimized for the processing signals in second generation LINAC Coherent Light Source (LCLS) X-Ray cameras. The ASIC high dynamic range application requiring spatial resolution and fast frame rates. ePix are based on common platform composed random access analog matrix with global shutter, parallel column readout, dedicated sigma-delta to digital converters per column. has 100um×100um pixels arranged 176×192 matrix,...
ePix100 is the first variant of a novel class integrating pixel ASICs architectures optimized for processing signals in second generation LINAC Coherent Light Source (LCLS) X-Ray cameras. ePix are based on common platform composed random access analog matrix with global shutter, fast parallel column readout, and dedicated sigma-delta to digital converters per column. The low noise application requiring high spatial resolution frame rates. ASIC has pixels 50×50 μm <sup...
OVER the past two decades momentum resolving spectrometers have revolutionized electron and ion spectroscopy. Momentum spectroscopy has enabled a new class of experiments in both laser based ultrafast sciences, x-ray [1]. The fundamental concept these is that time-of-arrival (ToA) position each fragment measured. From data vector particle can be calculated. So far delay-line detectors on microchannel plate (MCP) long wire anode been used which are severely limited their multi-hit capability...
"eLine", a class of multichannel time-variant integrating front-end Application Specific Integrated Circuits (ASICs), has been completed at SLAC National Accelerator Laboratory for applications the Linac Coherent Light Source (LCLS). The class, designed pixelated sensors with column-parallel readout, is composed two ASICs: one high-dynamic range (eLine10k) and ultra-low noise (eLine100). first allows large input full-scale signals, on order 10 <sup...
A new hybrid pixel array detector, the ePix100, has been developed at SLAC for tender and hard x-ray experiments Linac Coherent Light Source (LCLS). It is intended low noise good spatial resolution applications, particularly X-ray Photon Correlation Spectroscopy (XPCS) in combination with wavelength dispersive spectrometers. The detector 50 μm size less than 100 e- r.m.s. over range of tested operating conditions. series measurements to validate its performance x-rays was carried out...
The high repetition rate of second generation FEL is pushing the requirements photon science x-ray cameras. In particular LCLS-II, planned upgrade LCLS, will be able to operate at a continuous 1 MHz. To exploit new possibilities this novel machine an program for ePix family detectors undergoing. ASICs integrate core functionalities Their architecture based on common platform composed random access analog matrix pixel with global shutter, fast parallel column readout. ePixHR represents and...
LCLS-II, a Free Electron Laser (FEL) X-ray light source, started operations at SLAC National lab in 2020. This new machine will produce pulses with repetition rate up to 1,000,000 times per second. To take advantage of its high pulse rate, detectors and readout systems that can operate the same frequency cope generated data volumes are being developed. In this paper, we present system for first generation ePixHR including ASIC, namely, ePixHR10k, prototype family. aims sustaining rates...