A5057652152- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Gyrotron and Vacuum Electronics Research
- Advanced X-ray Imaging Techniques
- Particle Detector Development and Performance
- Nuclear Physics and Applications
- Laser-Plasma Interactions and Diagnostics
- Superconducting Materials and Applications
- Pulsed Power Technology Applications
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Laser Design and Applications
- Crystallography and Radiation Phenomena
- Laser-Matter Interactions and Applications
- Photonic and Optical Devices
- Advanced Electron Microscopy Techniques and Applications
- Medical Imaging Techniques and Applications
- Diamond and Carbon-based Materials Research
- Advanced X-ray and CT Imaging
- 3D IC and TSV technologies
- Radiation Shielding Materials Analysis
- Non-Destructive Testing Techniques
- Magnetic confinement fusion research
- Silicon Carbide Semiconductor Technologies
- Additive Manufacturing and 3D Printing Technologies
RadiaBeam Technologies (United States)
2016-2025
National Research Nuclear University MEPhI
2020
Argonne National Laboratory
2020
University of California, Los Angeles
2002-2010
Brookhaven National Laboratory
2010
SLAC National Accelerator Laboratory
2010
UCLA Health
2007
The production of high spectral brilliance radiation from electron beam sources depends critically on the qualities. One must obtain very brightness, implying simultaneous peak current and low emittance. These attributes are enabled through use field acceleration in a radio-frequency (rf) photoinjector source. Despite fields currently utilized, there is limit achievable brightness operation, range tens Ampere. This limitation can be overcome by hybrid standing wave/traveling wave structure;...
One of the main factors limiting performance conventional x-ray cargo inspection with material discrimination (MD) is interlaced mode system operation. Such systems use pulsed linac or betatron generators and produce alternate bremsstrahlung pulses lower- higher- end-point energies. Consequently, these provide about 50 mm lower penetration than a operated in non-interlaced mode, have limited range areal densities valid MD, cannot perform MD objects smaller pulse separation. Also, repetition...
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),...
Measuring longitudinal beam parameters is important for operation and development of high intensity linear accelerators, but it notoriously difficult proton ion beams at non-relativistic energies. The Bunch Shape Monitor (BSM) a device used measuring the bunch distribution in linacs. existing BSM models have poor electron collection efficiency from wire are limited to one-dimensional measurements phase coordinate. In response this problem, we developed new generation with improved...
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 compensate for pulse-to-pulse fluctuation structures a feedback loop. The LLRF typically implemented analog mixers, heterodyne-based architectures, discrete data converters. There signals from each stations, so number channels required increases rapidly stations. With large channels, footprint,...
Inverse Compton Scattering (ICS) is an emerging compact X-ray source technology, where the small size and high spectral brightness are of interest for multitude applications. However, to satisfy practical flux requirements, a high-repetition-rate ICS system needs be developed. To this end, paper reports experimental demonstration peak operating in burst mode at 40 MHz. A pulse train interaction has been achieved by recirculating picosecond CO2 laser inside active optical cavity synchronized...
VISA (Visible to Infrared SASE Amplifier) is a high-gain self-amplified spontaneous emission (SASE) free-electron laser (FEL), which achieved saturation at 840 nm within single-pass 4-m undulator. The experiment was performed the Accelerator Test Facility BNL, using high brightness 70-MeV electron beam. A gain length shorter than 18 cm has been obtained, yielding total of 2 x 10(8) saturation. FEL performance, including spectral, angular, and statistical properties radiation, characterized...
We report observations of an intense sub-THz radiation extracted from a ∼3 MeV electron beam with flat transverse profile propagating between two parallel oversized copper gratings side openings. Low-loss outcoupling is accomplished using horn antenna and miniature permanent magnet separating beams. A tabletop experiment utilizes radio frequency thermionic gun delivering thousand momentum-chirped microbunches per macropulse alpha-magnet movable scraper producing sub-mm microbunches. The...
Recently, considerable work has been directed at the development of an ultracompact X-ray free-electron laser (UCXFEL) based on emerging techniques in high-field cryogenic acceleration, with attendant dramatic improvements electron beam brightness and state-of-the-art concepts dynamics, magnetic undulators, optics. A full conceptual design a 1 nm (1.24 keV) UCXFEL length cost over order magnitude below current lasers (XFELs) resulted from this effort. This instrument developed emphasis...
Optical photonic structures driven by picosecond, GW-class lasers are emerging as promising novel sources of electron beams and high quality X-rays. Due to quadratic dependence on wavelength the laser ponderomotive potential, performance such scales very favorably towards longer drive wavelengths. However, take full advantage at mid-IR spectral region, it is important determine optical breakdown limits common materials. To this end, an experimental study was carried out a 5 µm, using...
A novel high speed Adaptive Railroad Cargo Inspection System (ARCIS) is being developed at RadiaBeam Technologies. The ARCIS concept relies on linac-based, adaptive, ramped energy source of short X-ray packets pulses, a new type fast detectors, rapid processing detector signals for intelligent control the linac, and advanced radiography image processing. requirements this system include better than 5 mm line pair resolution, penetration greater 400 steel equivalent, scan speeds up to 60...
The development of high-gradient accelerating structures for low-$\ensuremath{\beta}$ particles is the key compact hadron linear accelerators. A particular example such a machine therapy linac, which promising alternative to cyclic machines, traditionally used cancer treatment. Currently, practical utilization accelerators in radiation limited by requirement be under 50 m length. usable device should produce 200--250 MeV protons and/or $400--450\text{ }\text{ }\mathrm{MeV}/\mathrm{u}$ carbon...
X-ray multi-energy adaptive security radiography and computed tomography inspection techniques have superior performance compared to conventional dual-energy methods where two image slices are acquired by alternating energies. This new technique allows improving the quality of radiographic CT images, expanding range areal densities interrogated objects over which effective discrimination materials atomic number is possible, eliminating artifacts in boundaries different densities, reducing...
Recently, considerable work has been directed at development of a ultra-compact X-ray free-electron laser based on emerging techniques in high field cryogenic acceleration, with attendant dramatic improvements electron beam brightness, and state-of-the-art concepts dynamics, magnetic undulators, optics. A full conceptual design 1 nm XFEL length cost over an order magnitude below current XFELs resulted from this effort. This instrument developed emphasis permitting exploratory scientific...
Observation of ultrawide bandwidth, up to 15% full-width, high-gain operation a self-amplified spontaneous emission free-election laser (SASE FEL) is reported. This type lasing obtained with strongly chirped beam (deltaE/E approximately 1.7%) emitted from the accelerator. Because nonlinear pulse compression during transport, short, high current bunch strong mismatch errors injected into undulator, giving FEL gain. Start-to-end simulations reproduce key features measurements and provide...
This study examines how a practical source of X-ray radiation, capable delivering unprecedented 100 Gy/s at 1 m for FLASH radiotherapy can be designed. We proposed the design linac, accelerating 18 MeV 8 mA electron beam with further conversion to bremsstrahlung X-rays. The is based on L-band traveling wave structures high power efficiency, operating in short-burst/long-pulse regime that allows supply regime, beyond its specifications. demonstrates feasibility high-power linac clinical...
Abstract Production of hard X-ray via inverse Compton scattering at photon energies below 100 keV range aimed potential applications in medicine and material research is reported. Experiments have been performed the Brookhaven National Laboratory, Accelerator Test Facility, employing counter collision a 70 MeV, 0.3 nC electron beam with near infra-red Nd: YAG laser (1064 nm wavelength) pulse containing ~ mJ single shot basis. The radiation distribution scattered assessed to be sufficiently...
Abstract Free-electron-lasers fill a critical gap in the space of THz-sources as they can reach high average and peak powers with spectral tunability. Using waveguide THz FEL significantly increases coupling between relativistic electrons electromagnetic field enabling large amounts radiation to be generated single passage through undulator. In addition transversely confining radiation, dispersive properties critically affect velocity slippage pulse which determine central frequency...