R. Van Berg
A5111594532- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Quantum Chromodynamics and Particle Interactions
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Advancements in PLL and VCO Technologies
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- VLSI and Analog Circuit Testing
- Medical Imaging Techniques and Applications
- Adaptive optics and wavefront sensing
- Muon and positron interactions and applications
- Radiation Effects in Electronics
- CCD and CMOS Imaging Sensors
- Parallel Computing and Optimization Techniques
- Black Holes and Theoretical Physics
- Satellite Image Processing and Photogrammetry
- Sensor Technology and Measurement Systems
- Gyrotron and Vacuum Electronics Research
University of Pennsylvania
2004-2024
California University of Pennsylvania
2012-2024
Uppsala University
2014
Philadelphia University
1993-2013
Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Udine
2012
University of Udine
2012
The Abdus Salam International Centre for Theoretical Physics (ICTP)
2012
Fermi Research Alliance
2005
University of California, Irvine
2000
Princeton University
2000
The Large Synoptic Survey Telescope (LSST) is a large aperture, wide-field facility designed to provide deep images of half the sky every few nights. There only single instrument on telescope, 9.6 square degree visible-band camera, which mounted close secondary mirror, and points down toward tertiary. requirements of the LSST camera present substantial technical design challenges. To cover entire 0.35 1 μm visible band, camera incorporates an array 189 over-depleted bulk silicon CCDs...
The science focal plane of the LSST camera is made up 21 fully autonomous 144 Mpixel imager units designated raft tower modules (RTM). These imagers incorporate nine 4K x fully-depleted CCDs and channels readout electronics, including a dedicated CMOS video processing ASIC components that provide CCD biasing clocking, digitization, thermal stabilization, high degree monitoring telemetry. RTM achieves its performance goals for speed, read noise, linearity, crosstalk with power budget less...
We describe the new CDF Level 2 Trigger, which was commissioned during Spring 2005. The upgrade necessitated by several factors that included increased bandwidth requirements, in view of growing instantaneous luminosity Tevatron, and need for a more robust system, since older system reaching limits maintainability. challenges designing were interfacing with many different upstream detector subsystems, processing larger volumes data at higher speed, minimizing impact on running experiment...
A time to charge converter IC with an analog memory unit (TCCAMU) has been designed and fabricated in HP's CMOS 1.2-/spl mu/m n-well process. The TCCAMU is event driven system for front end data acquisition high energy physics experiments. chip includes a converter, Level 1 2 associative memories input pipelining filtering, A/D converter. intervals measured digitized range from 8-24 ns. Testing of the resulted LSB width 107 ps, typical differential nonlinearity <35 integral <200 ps. average...
The science focal plane of the Large Synoptic Survey Telescope is made up 21 modules designated "raft towers". Each raft tower module (RTM) an autonomous, fully-testable and serviceable 144 Mpixel imager consisting nine highly-segmented CCDs with complete readout electronics chain. To minimize noise obscuration RTM housed in a compact enclosure fully contained within camera cryostat. required to meet strict performance goals for image flatness, speed, noise, power dissipation. Key components...
The design of front-end electronic systems for experiments at very-high-interaction-rate colliding beams and fixed-target accelerators is discussed. Consideration given to the preamplifier shaping amplifier design, optimal choice technology, with particular emphasis on detectors source capacitance in range 1-30 pF times 3-20 ns. Possible architectures a two-level, on-chip buffering system which enable simultaneous, asynchronous data acquisition readout nearly no deadtime are Emphasis placed...
The LSST camera is a wide-field optical (0.35-1μm) imager designed to provide 3.5 degree FOV with 0.2 arcsecond/pixel sampling. detector format will be circular mosaic providing approximately 3.2 Gigapixels per image. includes filter mechanism and shuttering capability. It positioned in the middle of telescope where cross-sectional area constrained by vignetting heat dissipation must controlled limit thermal gradients beam. fast f/1.2 beam require tight tolerances on focal plane mechanical...
A prototype of the Transition Radiation Tracker (TRT) for ATLAS detector at LHC has been built and tested. The TRT is an array straw tubes which integrate tracking electron identification by transition radiation into one device. Results experimental measurements comparisons with Monte-Carlo simulations are presented performance as a function various parameters. Under optimal operating conditions, rejection against pions factor 100 was achieved 90% efficiency.
The CDF data acquisition and trigger system is being upgraded to significantly increase the bandwidth for upcoming high luminosity running of Tevatron Collider (run IIb). This paper focuses on upgrade level 2 (L2) decision crate. crate at heart L2 has interface with many different subsystems both upstream downstream. challenge this have a uniform design be able paths upstream, merge process speed fast making, minimize impact experiment during commissioning phase. In order meet challenge,...
This report is intended to describe first, the principal physics reasons for an ambitious experimental program in neutrino and proton decay based on construction of a series massive water Cherenkov detectors located deep underground (4850 ft) Homestake Mine South Dakota Science Technology Authority (SDSTA); second, engineering design chambers house detector modules; third, conceptual themselves this purpose. Included document are preliminary costs time-to-completion estimates which have been...
A 16-channel digital time-measurement readout chip (DTMROC) has been fabricated in TEMIC corporations 0.8-/spl mu/m DMnL BI-CMOS SOI radiation-hard process for the Large Hadron Collider's (LHC) Transition Radiation Tracker (ATLAS/TRT) at CERN, receives discriminated straw-drift-tube signals from bipolar amplifier-shaper-discriminator chips (ASDBLR), measures arrival time 3.125-ns increments (/spl plusmn/1 ns), and stores data a pipeline 3.3 /spl mu/s. trigger signal (L1A) causes to be tagged...
We have designed, fabricated and tested a full custom analog bipolar chip set for front end readout of the 10000 PMT Sudbury Neutrino Observatory. Each instruments four independent PMT's with two self-gating integrator (HI/LO) channels, fast discriminator timing sequence three programmable intervals. The provides companion CMOS time to voltage converter (TVC) memory integration gates fixed width pulse suitable measurement trigger processing. Novel features such as an internal 12 ns delay...
NaI(Tl) position sensitive detectors have been used in medical imaging for many years. For PET applications without collimators, the high counting rates place severe demands on such large area detectors. The PENN-PET scanners are read-out via photomultiplier tubes and preamplifiers. Those preamplifiers use a delay-line clipping technique to shorten characteristic 240 ns fall time of signal. As an alternative, authors investigated pole-zero network signal followed by multi-pole shaper produce...
The transition radiation tracker (TRT) is one of three particle tracking detectors now under construction for the ATLAS experiment, whose goal to exploit highly exciting new physics potential at CERN's next accelerator, so called Large Hadron Collider (LHC). TRT consists 370000 straw proportional tubes 4 mm diameter with a 30 micron thick anode wire, which will be operated Xe/CO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2 </sub> /O...
The Transition Radiation Tracker, made of 370000 cylindrical straws, is a combined tracking and electron identification detector, which part the ATLAS Inner Detector at CERN LHC. TRT on-detector electronics 2 types custom asics, handling analogue signals from providing ternary encoded output (ASDBLR), binning incoming discriminator signal into 3.25ns bins storing up to 6 microseconds level 1 storage (DTMROC). This joined off-detector via patch-panels in charge data distribution. comprised...
A new version of the circuit for readout ATLAS straw tube detector, TRT [1], has been developed in a deep-submicron process. The DTMROC-S is fabricated commercial 0.25μm CMOS IBM technology, with library hardened by layout techniques [2]. Compared to previous chip [3] done 0.8μm radiation-hard and despite features added improving robustness testability circuit, technology results much smaller size that increases production yield lowers power consumption.