A5034223270- Advanced X-ray Imaging Techniques
- Particle Detector Development and Performance
- Medical Imaging Techniques and Applications
- Superconducting and THz Device Technology
- CCD and CMOS Imaging Sensors
- Analog and Mixed-Signal Circuit Design
- Particle Accelerators and Free-Electron Lasers
- Advanced Electron Microscopy Techniques and Applications
- Astrophysics and Cosmic Phenomena
- Advancements in PLL and VCO Technologies
- Advancements in Photolithography Techniques
- Dark Matter and Cosmic Phenomena
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced X-ray and CT Imaging
- Radiation Detection and Scintillator Technologies
- Radio Astronomy Observations and Technology
- Semiconductor materials and devices
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Gamma-ray bursts and supernovae
- Enzyme Structure and Function
- Fault Detection and Control Systems
- thermodynamics and calorimetric analyses
- Sensor Technology and Measurement Systems
- Inertial Sensor and Navigation
SLAC National Accelerator Laboratory
2013-2024
Menlo School
2014-2019
European X-Ray Free-Electron Laser
2017
Brookhaven National Laboratory
2017
Williams (United States)
2017
SRI International
2017
Stanford University
1986-2014
STMicroelectronics (Switzerland)
2011
STMicroelectronics (France)
2009
Kavli Institute for Particle Astrophysics and Cosmology
2009
(Abridged) The Large Area Telescope (Fermi/LAT, hereafter LAT), the primary instrument on Fermi Gamma-ray Space (Fermi) mission, is an imaging, wide field-of-view, high-energy gamma-ray telescope, covering energy range from below 20 MeV to more than 300 GeV. This paper describes LAT, its pre-flight expected performance, and summarizes key science objectives that will be addressed. On-orbit performance presented in detail a subsequent paper. LAT pair-conversion telescope with precision...
Size Matters Less X-ray crystallography is a central research tool for uncovering the structures of proteins and other macromolecules. However, its applicability typically requires growth large crystals, in part because sufficient number molecules must be present lattice sample to withstand x-ray—induced damage. Boutet et al. (p. 362 , published online 31 May) now demonstrate that intense x-ray pulses emitted by free-electron laser source can yield data few enough exposures uncover...
We present the science case, reference design, and project plan for Stage-4 ground-based cosmic microwave background experiment CMB-S4.
The Vela pulsar is the brightest persistent source in GeV sky and thus traditional first target for new gamma-ray observatories. We report here on initial Fermi Large Area Telescope observations during verification phase pointed exposure early survey scanning. have used signal to verify timing angular resolution. high quality pulse profile, with some 32,400 pulsed photons at E>0.03 GeV, shows features, including structure as fine 0.3ms a distinct third peak, which shifts energy. examine...
The Linear Coherent Light Source (LCLS), a free electron laser operating from 250eV to10keV at 120Hz, is opening windows on new science in biology, chemistry, and solid state, atomic, plasma physics<sup>1,2</sup>. FEL provides coherent x-rays femtosecond pulses of unprecedented intensity. This allows the study materials up to 3 orders magnitude shorter time scales than previously possible. Many experiments LCLS require detector that can image scattered per-shot basis with high efficiency...
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...
The projected performance and detector configuration of nEXO are described in this pre-Conceptual Design Report (pCDR). is a tonne-scale neutrinoless double beta ($0νββ$) decay search $^{136}$Xe, based on the ultra-low background liquid xenon technology validated by EXO-200. With $\simeq$ 5000 kg enriched to 90% isotope 136, has half-life sensitivity approximately $10^{28}$ years. This represents an improvement about two orders magnitude with respect current results. Based experience gained...
We describe the newest generation of SLAC Microresonator RF (SMuRF) electronics, a warm digital control and readout system for microwave-frequency resonator-based cryogenic detector multiplexer systems, such as microwave superconducting quantum interference device multiplexers (μmux) or kinetic inductance detectors. Ultra-sensitive measurements in particle physics astronomy increasingly rely on large arrays sensors, which turn necessitate highly multiplexed accompanying room-temperature...
The ePix10ka2M (ePix10k) is a new large area detector specifically developed for X-ray free-electron laser (XFEL) applications. hybrid pixel was at SLAC to provide hard with high dynamic range, running the 120 Hz repetition rate of Linac Coherent Light Source (LCLS). ePix10k consists 16 modules, each 352 × 384 pixels 100 µm distributed on four ASICs, resulting in 2.16 megapixel detector, 16.5 cm active and ∼80% coverage. range achieved three distinct gain settings (low, medium, high) as well...
The Cornell-SLAC pixel array detector (CSpad) is a general-purpose integrating hybrid x-ray camera developed for use at the Linear Coherent Light Source (LCLS) free electron laser SLAC National Accelerator Laboratory (SLAC). has full well capacity of about 2.Sk photons in low-gain mode and SIN 6 high-gain mode. Its 2.3M pixels are read out 120 Hz. comprises 32 500μm silicon sensors bump-bonded to 64 185×194-pixel ASICs. size 110μm. water-cooled quadrants can be radially moved in-situ vary...
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...
Metal-oxide-metal (MOM) capacitors represent an attractive alternative to metal-insulator-metal (MIM) in mixed-signal integrated circuits. Since they are made of metal lines, can be standard CMOS processes, and tailored over a wide range sizes. Mismatch data MOM capacitors, however, is scarce typically conservative. Presented the design test results custom ADC that employs array 1024 sized at 2 fF. Static performance metrics presented compared with those for based on MIM capacitors. computed...
The SLAC RCE platform is a general purpose clustered data acquisition system implemented on custom ATCA compliant blade, called the Cluster On Board (COB). core of Reconfigurable Element (RCE), which system-on-chip design based upon Xilinx Zynq family FPGAs, mounted COB daughter-boards. architecture couples dual ARM Cortex A9 processor with high performance 28nm FPGA. has 12 external bi-directional speed links, each supporting serial rates up to 12Gbps. 8 nodes are included COB, 10Gbps...
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...
We present the conceptual design of modular detector and readout system for Cosmic Microwave Background – Stage four (CMB-S4) ground-based survey experiment. CMB-S4 will map cosmic microwave background (CMB) millimeter-wave sky to unprecedented sensitivity, using 500,000 superconducting detectors observing from Chile Antarctica over 60% sky. The fundamental building block is a module package operated at 100 mK, which connected amplification chain that carries signals out room temperature. It...
Analog switched-capacitor memory circuits are suitable for use in a wide range of applications where analog waveforms must be captured or delayed, such as the recording pulse echo events and shapes. sampling systems based on techniques offer performance superior to that flash A/D converters charge-coupled devices with respect cost, density, dynamic range, speed, power consumption. This paper proposes an architecture which frequencies several hundred megahertz can achieved using conventional...
After improving the PCB level electronics next step in our continuing upgrade program of LCLS Cornell-SLAC Pixel Array Detector (CSPAD) cameras is use a new improved ASIC named CSPAD V1.5. The upgraded includes on chip DACs to set bias currents all amplifiers. also supports power cycling by design. Together this simplifies complexity and eases integration many ASICs into one camera. Homogeneity across full reticle size was redesigning distribution. included modifications gain latches per...
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 Silicon Detector proposed for the International Linear Collider (ILC) requires electronic read-out that can be tightly coupled to silicon detectors envisioned tracker and electromagnetic calorimeter. KPiX is a 1024-channel chip bump-bonds detector communicates through few digital signals, power, bias. front-end low-noise dual-range charge-amplifier with dynamic range of 17 bit, achieved by autonomous switching feedback capacitor. device takes advantage ILC duty cycle 1 ms trains at 5 Hz...
In-house developed cameras and other commercial detectors are typically tested with x-ray tubes at synchrotron beamlines before being deployed used for science experiments. In a prototyping phase, this is needed to understand characterize the behavior of detector. more advanced development measurements x-rays required calibrate camera. Tests in actual experimental conditions indeed valuable source detector developers. However, when all photons arrive once, as FELs, response can be very...
Test results on a newly developed Multi-Channel Sample- And-Hold Calorimeter Data Unit (CDU) are presented. The device is organized as 32 input channels, each consisting of four storage cells to take samples the analog signals at separate times. design goals for development were wide dynamic range and long hold Therefore, cell laid out in fully differential way consists sampling stage signal another identical reference voltage. Results performance described.