Larry Ruckman
A5085721547- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Radio Astronomy Observations and Technology
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- CCD and CMOS Imaging Sensors
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Advancements in PLL and VCO Technologies
- Superconducting and THz Device Technology
- Atomic and Subatomic Physics Research
- Cancer Genomics and Diagnostics
- Radio Frequency Integrated Circuit Design
- Radiation Effects in Electronics
- Gyrotron and Vacuum Electronics Research
- Lung Cancer Research Studies
- Advanced X-ray Imaging Techniques
- Lung Cancer Treatments and Mutations
- Particle physics theoretical and experimental studies
- Wheat and Barley Genetics and Pathology
- Distributed and Parallel Computing Systems
- Fault Detection and Control Systems
- Advanced Data Storage Technologies
SLAC National Accelerator Laboratory
2014-2024
Creare (United States)
2024
Linac Coherent Light Source
2023
Menlo School
2023
National Institute of Standards and Technology
2021
Kavli Institute for Particle Astrophysics and Cosmology
2021
Princeton University
2021
University of California, San Diego
2021
Stanford University
2021
University of Colorado Boulder
2021
The Belle detector at the KEKB electron-positron collider has collected almost 1 billion Y(4S) events in its decade of operation. Super-KEKB, an upgrade is under construction, to increase luminosity by two orders magnitude during a three-year shutdown, with ultimate goal 8E35 /cm^2 /s luminosity. To exploit increased luminosity, been proposed. A new international collaboration Belle-II, being formed. Technical Design Report presents physics motivation, basic methods accelerator upgrade, as...
The Antarctic Impulsive Transient Antenna (ANITA) completed its second long-duration balloon flight in January 2009, with 31 days aloft (28.5 live days) over Antarctica. ANITA searches for impulsive coherent radio Cherenkov emission from 200 to 1200 MHz, arising the Askaryan charge excess ultra-high energy neutrino-induced cascades within ice. This included significant improvements first payload sensitivity, efficiency, and a trajectory deeper Analysis of in-flight calibration pulses surface...
We report on observations of coherent, impulsive radio Cherenkov radiation from electromagnetic showers in solid ice. This is the first observation Askaryan effect As part complete validation process for ANITA experiment, we performed an experiment at Stanford Linear Accelerator Center June 2006 using a 7.5 metric ton ice target. measure time large-scale angular dependence pattern, major factor determining solid-angle acceptance ultrahigh-energy neutrino detectors.
We report the observation of 16 cosmic ray events with a mean energy $1.5\ifmmode\times\else\texttimes\fi{}{10}^{19}\text{ }\text{ }\mathrm{eV}$ via radio pulses originating from interaction air shower Antarctic geomagnetic field, process known as geosynchrotron emission. present measurements in 300--900 MHz range, which are first self-triggered, ultrawide band, far-field, and highest sample collected technique. Their properties inconsistent current ground-based models. The emission is 100%...
We report on four radio-detected cosmic-ray (CR) or CR-like events observed with the Antarctic Impulsive Transient Antenna (ANITA), a NASA-sponsored long-duration balloon payload. Two of were previously identified as stratospheric CR air showers during ANITA-I flight. A third was detected ANITA-II Here we characteristics these three unusual events, which develop nearly horizontally, 20-30~km above surface Earth. In addition, fourth steeply upward-pointing radio event has consistent primary...
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...
We report initial results of the first flight Antarctic Impulsive Transient Antenna (ANITA-1) 2006-2007 Long Duration Balloon flight, which searched for evidence a diffuse flux cosmic neutrinos above energies E(nu) approximately 3 x 10(18) eV. ANITA-1 flew 35 days looking radio impulses due to Askaryan effect in neutrino-induced electromagnetic showers within ice sheets. here on our analysis, was performed as blind search data. No neutrino candidates are seen, with no detected physics...
A microwave SQUID multiplexer ($\mu$MUX) has been optimized for coupling to large arrays of superconducting transition-edge sensor (TES) bolometers. We present the scalable cryogenic chip design in a 1820-channel configuration 4-8 GHz rf band. The key metrics yield, sensitivity, and crosstalk are determined through measurements 455 readout channels, which span 4-5 GHz. median white-noise level is 45 pA/$\sqrt{\textrm{Hz}}$, evaluated at 2 Hz, with 1/f knee $\leq$ 20 mHz after common-mode...
Normal conducting linear particle accelerators consist of multiple rf stations with accelerating structure cavities. Low-level (LLRF) systems are employed to set the phase and amplitude field in structure, compensate pulse-to-pulse fluctuation structures a feedback loop. The LLRF typically implemented analogue mixers, heterodyne based architectures discrete data converters. There signals from each station, so number channels required increases rapidly stations. With many channels, footprint,...
A compact low-level RF (LLRF) control system based on system-on-chip (RFSoC) technology has been designed for the Advanced Concept Compact Electron Linear-accelerator (ACCEL) program, which challenging requirements in both performance and size, weight power consumption (SWaP). The LLRF solution employs direct sampling technique of RFSoC, samples signals directly without any analogue up down conversion. Compared with conventional heterodyne architecture used linear accelerator (LINAC),...
We investigate a possible new technique for microwave detection of cosmic-ray extensive air showers which relies on expected continuum radiation in the range, caused by free-electron collisions with neutrals tenuous plasma left after passage shower. performed an initial experiment at Argonne Wakefield Accelerator laboratory 2003 and measured broadband emission from ionized via high-energy electrons photons. A follow-up Stanford Linear Center summer 2004 confirmed major features previous...
We have conducted a search for extended energy deposition trails left by ultrarelativistic magnetic monopoles interacting in Antarctic ice. The nonobservation of any satisfactory candidates the 31 days accumulated ANITA-II (Antarctic Impulsive Transient Antenna) flight data results an upper limit on diffuse flux relativistic monopoles. obtain 90% C.L. order 10−19 (cm2 s sr)−1 values Lorentz factor, γ, 1010≤γ at anticipated Etot=1016 GeV. This bound is stronger than all previously published...
Abstract This paper presents the design and characterisation of a front-end prototype ASIC for ATLAS High Granularity Timing Detector, which is planned High-Luminosity phase LHC. prototype, called ALTIROC1, consists 5 × 5-pad matrix contains analog part single-channel readout (preamplifier, discriminator, two TDCs SRAM). Two preamplifier architectures (transimpedance voltage) were implemented tested. The was characterised both alone as module when connected to array LGAD sensors. In...