Explanipedia

Linear transformer driver for pulse generation with fifth harmonic Open

M.G. Mazarakis, Alexander Kim, V.A. Sinebryukhov, Sergey N. Volkov, Sergey Kondratiev , et al. · 2023

A linear transformer driver includes at least one ferrite ring positioned to accept a load. The linear transformer driver also includes a first, second, and third power delivery module. The first power delivery module sends a first energy …

Characterization of self-magnetic pinch radiographic diode performance on RITS-6 at Sandia National Laboratories. II. Coupling between the inductive voltage adder and the SMP load Open

Timothy Renk, B. V. Oliver, Mark L. Kiefer, Timothy Webb, Joshua J. Leckbee , et al. · 2022

The self-magnetic pinch (SMP) diode is a type of radiographic diode used to generate an intense electron beam for radiographic applications. At Sandia National Laboratories, SMP was the diode load for the six-cavity radiographic integrated…

Characterization of self-magnetic pinch (SMP) radiographic diode performance on RITS-6 at Sandia National Laboratories. I. Diode dynamics, DC heating to extend radiation pulse Open

Timothy Renk, B. V. Oliver, Mark L. Kiefer, Timothy Webb, Joshua J. Leckbee , et al. · 2022

Radiographic diodes focus on an intense electron beam to a small spot size to minimize the source area of energetic photons for radiographic interrogation. The self-magnetic pinch (SMP) diode has been developed as such a source and operate…

Characterization of Self-Magnetic Pinch (SMP) radiographic diode performance on RITS-6 at Sandia National Laboratories: 1) Diode Dynamics, DC Heating to extend Radiation Pulse Open

Timothy Renk, B. V. Oliver, Mark L. Kiefer, Timothy Webb, Joshua J. Leckbee , et al. · 2021

Radiographic diodes focus an intense electron beam to a small spot size to minimize the source area of energetic photons for radiographic interrogation. The self-magnetic pinch (SMP) diode has been developed as such a source and operated a…

Characterization of Self-Magnetic Pinch (SMP) Radiographic Diode Performance on RITS-6 at Sandia National Laboratories Open

Timothy Renk, Mark L. Kiefer, B. V. Oliver, Timothy Webb, Joshua Leckbie , et al. · 2020

The goals of an electron beam-driven radiographic source are the focusing of high current at high voltage to a minimal spot size with excellent shot-to-shot reproducibility. The Self-Magnetic Pinch (SMP) diode makes use of such an intense …

Visible Spectroscopy Techniques for Diagnosing Plasmas in High-Energy-Density Power-Flow Systems. Open

Sonal Patel, Mark L. Kiefer, M. E. Cuneo, Y. Maron, E. Stambulchik , et al. · 2020

Review of pulsed power-driven high energy density physics research on Z at Sandia Open

D. B. Sinars, M. A. Sweeney, C. S. Alexander, D. J. Ampleford, Tommy Ao , et al. · 2020

Pulsed power accelerators compress electrical energy in space and time to provide versatile experimental platforms for high energy density and inertial confinement fusion science. The 80-TW “Z” pulsed power facility at Sandia National Labo…

Experimental Results from the 1.2 ma, 2.2 m Diameter Linear Transformer Driver at Sandia National Labs Open

J. D. Douglass, Brian Hutsel, Joshua J. Leckbee, Brian Stoltzfus, Matthew Louis Wisher , et al. · 2019

Herein we describe the design, simulation and performance of a 118-GW linear transformer driver (LTD) cavity at Sandia National Laboratories. The cavity consists of 20 to 24 "Bricks". Each brick is comprised of two 80 nF, 100 kV capacitors…

A Primer on Pulsed Power and Linear Transformer Drivers for High Energy Density Physics Applications Open

R. D. McBride, W. A. Stygar, M. E. Cuneo, D. B. Sinars, M.G. Mazarakis , et al. · 2018

The objectives of this tutorial are as follows: (1) to help students and researchers develop a basic understanding of how pulsed-power systems are used to create high-energydensity matter; (2) to develop a basic understanding of a new, com…

Shielding of the azimuthal magnetic field by the anode plasma in a relativistic self-magnetic-pinch diode Open

Subir Biswas, M. D. Johnston, R. Doron, D. Mikitchuk, Y. Maron , et al. · 2018

In relativistic electron beam diodes, the self-generated magnetic field causes electron-beam focusing at the center of the anode. Generally, plasma is formed all over the anode surface during and after the process of the beam focusing. In …

Zeeman spectroscopy as a method for determining the magnetic field distribution in self-magnetic-pinch diodes (invited) Open

S. G. Patel, Mark D. Johnston, Timothy Webb, Nichelle Bennett, D. R. Welch , et al. · 2018

In the self-magnetic-pinch diode, the electron beam, produced through explosive field emission, focuses on the anode surface due to its own magnetic field. This process results in dense plasma formation on the anode surface, consisting pri…

Visible Spectroscopy Measurements of Plasmas and Fields on the Z-Machine at Sandia National Laboratories. Open

Mark D. Johnston, Sonal Patel, Ross E. Falcon, David E. Bliss, George Laity , et al. · 2018

Plasma Measurements in High Intensity Electron Beam Diodes Open

Mark L. Kiefer, Sonal Patel, Nichelle Bennett, D. R. Welch, V. Bernshtam , et al. · 2018

Experiments are being performed on the Self-Magnetic Pinch (SMP) electron beam diode on the RITS-6 accelerator at Sandia National Laboratories. This diode produces a tightly focused electron beam (< 3mm diameter) which is incident on a hig…

Contribution of the backstreaming ions to the self-magnetic pinch (SMP) diode current Open

M.G. Mazarakis, Nichelle Bennett, M. E. Cuneo, Sean Fournier, Mark D. Johnston , et al. · 2018

The results presented here were obtained with a self-magnetic pinch (SMP) diode mounted at the front high voltage end of the RITS accelerator. RITS is a Self-Magnetically Insulated Transmission Line (MITL) voltage adder that adds the volta…

Spectroscopic Measurements of Plasmas in the Power Flow Regions on the Z Machine Open

Mark W. Johnston, Sonal Patel, Mark L. Kiefer, M.E. Cuneo, R. Doron , et al. · 2018

Measuring Plasma Formation Field Strength and Current Loss in Pulsed Power Diodes Open

Mark D. Johnston, Sonal Patel, Ross E. Falcon, Keith Cartwright, Mark L. Kiefer , et al. · 2017

This LDRD investigated plasma formation, field strength, and current loss in pulsed power diodes. In particular the Self-Magnetic Pinch (SMP) e-beam diode was studied on the RITS-6 accelerator. Magnetic fields of a few Tesla and electric f…

Visible Spectroscopy Measurements of Plasmas and Fields in the Power Flow Regions on the Z-Machine Open

Mark Johnston, Sonal Patel, Ross E. Falcon, Keith Cartwright, Mark L. Kiefer , et al. · 2017

Magnetic Field Measurements on the Self Magnetic Pinch Diode At SNL using Zeeman Splitting. Open

Sonal Patel, Mark Johnston, Timothy Webb, D. J. Muron, M.G. Mazarakis , et al. · 2017

Testing high voltage (200KV) DC cable and feed-through designs in rep-rated modes Open

M.G. Mazarakis, Mark L. Kiefer, Joshua J. Leckbee, Del H. Anderson, Frank L. Wilkins , et al. · 2017

We have constructed a Component Test Stand (CTS) to test various high voltage components to be utilized in near future pulsed-power devices. In addition to cable and oil feed-through design voltage hold off, different types of high voltage…

Screamer version 4.1 Open

R. B. Spielman, K. W. Struve, Mark L. Kiefer, Kelley L. Shaw, W. W. Hsing , et al. · 2017

Screamer is a special purpose circuit code developed for the design of Pulsed Power systems. It models electrical circuits which have a restricted topology in order to provide a fast-running tool while still allowing configurations general…

Magnetic Field Measurements Using Zeeman Splitting on the SMP Diode at Sandia National Labs. Open

Sonal Patel, Mark Johnston, Timothy Webb, Y. Maron, Sonal Patel , et al. · 2016

Prospectus Exam: Magnetic Field Measurements on the Self Magnetic Pinch Diode At RITS-6 Using Zeeman Splitting. Open

Sonal Patel, Mark D. Johnston, Timothy Webb, Y. Maron, Nichelle Bennett , et al. · 2016

How the Inductive Voltage Adder (IVA) output impedance affects impedance dynamics of a Self-Magnetic Pinch (SMP) diode Open

Timothy Renk, Sean L. Simpson, Timothy Webb, M.G. Mazarakis, Mark L. Kiefer · 2016

Factors affecting the output pulse flatness of the linear transformer driver cavity systems with 5th harmonics Open

V. M. Alexeenko, M.G. Mazarakis, A. A. Kim, Sergey Kondratiev, V. A. Sinebryukhov , et al. · 2016

Here, we describe the study we have undertaken to evaluate the effect of component tolerances in obtaining a voltage output flat top for a linear transformer driver (LTD) cavity containing 3rd and 5th harmonic bricks [A. A. Kim et al., in …

Multi-Pulse Electron Diode Development for flash Radiography. Open

M.G. Mazarakis, M. E. Cuneo, Mark L. Kiefer, Joshua J. Leckbee, G. Randall McKee , et al. · 2016

Electrical Sciences Discipline. Open

Mark L. Kiefer · 2016

Measurements of magnetic and electric fields in high energy electron beam diodes Open

Mark D. Johnston, Sonal Patel, Mark L. Kiefer, Subir Biswas, R. Doron , et al. · 2016

Summary form only given. The RITS accelerator (5-11MV, 100-200kA) at Sandia National Laboratories is being used to evaluate the Self-Magnetic Pinch (SMP) diode as a potential flash x-ray radiography source. This diode consists of a small, …

In-situ anode heating and plasma glow discharge cleaning and its effects on atomic constituents in the A-K gap in Self-Magnetic Pinch (SMP) experiments Open

Sarah Simpson, Mark D. Johnston, M.G. Mazarakis, Timothy Renk, Ricky Tang , et al. · 2016

The RITS-6 inductive voltage adder (IVA) accelerator (3.5–8.5 MeV) at Sandia National Laboratories produces highpower (TW) focused electron beams (< 3mm diameter) for flash x-ray radiography applications. The Self-Magnetic Pinch (SMP) diod…

Dependence of the Back-streaming Ion Current on the Self-magnetic pinch (SMP) Electron Diode Parameters. Open

M.G. Mazarakis, Mark Johnston, Mark L. Kiefer, J. J. Leckbee, Dan ielsen , et al. · 2015

Evaluation of spot size and dose of the Self-Magnetic Pinch diode on the RITS-6 accelerator from 3-8 MV. Open

Timothy Webb, Mark D. Johnston, Mark L. Kiefer, Joshua J. Leckbee, D. R. Welch , et al. · 2015

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