A5012030803- Gyrotron and Vacuum Electronics Research
- Pulsed Power Technology Applications
- Laser Design and Applications
- Particle accelerators and beam dynamics
- Laser-Plasma Interactions and Diagnostics
- Magneto-Optical Properties and Applications
- Particle Accelerators and Free-Electron Lasers
- Quantum Information and Cryptography
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Quantum Mechanics and Applications
- Electromagnetic Effects on Materials
- Plasma Diagnostics and Applications
- Neural Networks and Reservoir Computing
- Laser-Matter Interactions and Applications
- Advanced Fiber Optic Sensors
- Photocathodes and Microchannel Plates
- Advanced Optical Sensing Technologies
- Magnetic confinement fusion research
- Graphite, nuclear technology, radiation studies
- Radiation Detection and Scintillator Technologies
- Optical Systems and Laser Technology
- Nuclear Physics and Applications
- Physical Unclonable Functions (PUFs) and Hardware Security
- CCD and CMOS Imaging Sensors
Sandia National Laboratories
2018-2024
Los Alamos National Laboratory
2008-2010
Dartmouth College
2003-2005
An economical, coherent, and widely tunable source does not exist spanning the far-infrared electromagnetic spectral range of 50–1000μm in wavelength. The Čerenkov free-electron laser (CFEL) is a promising candidate. This report describes an experimental investigation compact CFEL driven by high-quality low-energy electron beam. emission strong gain but remarkably low output coupling were observed.
We describe a direct electro-optical approach to measuring strong 118 MV/m narrow pulse width (~ 33 ns) electric field in the magnetically insulated transmission line (MITL) of pulsed power accelerator. To date, this is highest external measured electro-optically accelerator, and it between two three orders magnitude higher than values reported comparable high energy scientific experiments. The MITL one most important operating parameters an accelerator critical understanding properties...
Cerenkov free-electron lasers have primarily operated on the fundamental guided mode of dielectric waveguide. Higher-order generation would allow short wavelength emission in a relatively large scale resonator. In comparison to mode, we find that gain higher-order modes can be significant planar geometry. This analysis is presented with discussion practical limits.
Random number generators are important components of information security systems. In particular, cryptography standards require that the numbers generated by quantum key distribution applications meet a rigorous set standardized randomness tests. To date, implementations entangled (EQKD) have not included any assessment. We report on results tests and highlight how typical EQKD system operation affects successes failures in meeting fundamental test criteria.
We describe the use of quantum-mechanically entangled photons for sensing intrusions across a physical perimeter. Our approach to intrusion detection uses no-cloning principle quantum information science as protection against an intruder's ability spoof sensor receiver using 'classical' intercept-resend attack. Moreover, we employ correlated measurement outcomes from polarization-entangled protect 'quantum' attacks, i.e., attacks teleportation. explore bounds on and estimation theory,...
Novel microchannel plate (MCP) imaging detectors using cross strip (XS) anodes have been developed recently and demonstrated to be capable of position resolution better than ten microns, nanosecond timing accuracy, event rates greater 3 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sup> counts per second. These use charge division centroiding MCP signals directed onto two orthogonal layers sensing anode strips encode position, time,...
We describe a direct absolute magneto-optical approach to measuring the magnetic field driven by long pulse width (&gt;5 ms) and high electrical current (∼kA) in solenoidal coil. The are among most important operating parameters lightning research power distribution essential understanding properties of radiation output pulsed energy accelerators as well other platforms. However, accurately these fields currents using conventional diagnostics is difficult due strength ionizing...
We describe a direct magneto-optical approach to measuring the magnetic field driven by narrow pulse width (&lt;10 ns), 20 kA electrical current flow in transmission line of high energy pulsed power accelerator. The and are among most important operating parameters accelerator critical understanding properties radiation output. However, accurately these fields currents using conventional diagnostics is difficult due strength ionizing electromagnetic interference. Our uses fiber coupled...
The Hermes III accelerator is a 20-MV linear induction that has been in operation at Sandia National Laboratories since the late 1980's. Energy initially stored ten Marx banks are discharged into twenty intermediate store capacitors. These capacitors then switched with SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> -insulated high voltage Rimfire switches eighty parallel pulse forming lines further condition before finally delivering...
The electric field strength between the cathode and anode (i.e., voltage) of a pulsed power machine is one most important operating parameters device. However, to date, accurate precise voltage measurements on these high energy systems have proved difficult if not virtually impossible perform. In many cases, be performed take place in an environment cluttered with electromagnetic interference (EMI), radio frequency (RFI), electron pollution, there potential for electrical discharge (or...
There exists a wealth of information in the scientific literature on physical properties and device characterization procedures for complementary metal oxide semiconductor (CMOS), charge coupled (CCD) avalanche photodiode (APD) format detectors. Numerous papers books have also treated photocathode operation context photomultiplier tube (PMT) either non imaging applications or limited night vision capability. However, much less has been reported about detectors with novel cross delay line...
Advances in quantum physics and computational complexity threaten the security of present day cryptographic systems have driven development key distribution (QKD). Entangled (EQKD) is a secure protocol that based on fundamental mechanics not vulnerable to these threats. The primary figure merit for QKD ability generate secret bits. However, date, methods been developed simulate bit rate generation EQKD limited by techniques do provide complete description state produced source. In this...
HERMES III is a 20-MeV linear induction accelerator that was constructed at Sandia National Laboratories in the late 1980's and continues operation to this day. The utilizes 10 Marx banks for its initial energy storage pulse formation. These discharge their into 20 intermediate capacitors which, turn, feed 80 forming lines further condition pulse. Transmission line feeds from then deliver electrical cavities arrayed along axis of machine build final output central magnetically insulated...
Validation of plasma physics codes like EMPIRE requires performing uncertainty quantification comparing experimental data and simulation results. The Short Pulse, High Intensity Nanosecond X-radiator (SPHINX) is a high-voltage, high-shot rate bremsstrahlung accelerator at Sandia National Laboratories. SPHINX can additionally be operated in electron-beam mode by changing from the standard tantalum converter to 1-mil titanium connected drift cell that filled with low-pressure gas. primary beam...
The HERMES III accelerator is an 18-20-MeV linear induction constructed at Sandia National Laboratories in the late 1980s and which continues operation to this day. As part of recent modernization efforts, laser triggering system on has been replaced with a newly designed solid-state system. This consists ten Nd:YAG lasers, each having nominal output energy 40-45 mJ wavelength 266 nm. beam from split such that it triggers two Rimfire gas switches accelerator. Compared previous system,...