North Slope of Alaska ARM Facilities Monthly Status Update Sandia National Labs- February 2018
This monthly report is intended to communicate the status of North Slope ARM facilities managed by Sandia National Labs.
54 ENVIRONMENTAL SCIENCES↗
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Measurement of the E Polarization Observable for yd --> pi^-p(p_s), yd-->K^0Lambda(p_s), and yd-->pi^+pi^-d(0) using CLAS g14 data at Jefferson Lab
Photoproduction of mesons from the nucleon has a long and ongoing tradition for exploring nucleon excitations and the baryon-baryon interaction. Polarization observables which play a role in the photoproduction mechanism are, therefore, essential in addition to the differential cross section. The CLAS collaboration at Jefferson Lab, has been active in measuring these observables, but until now only on a proton targets. However, a comprehensive picture of the pseudoscalar meson photoproduction requires neutron data as well. That is, paired measurements of observables in p and n reactions are necessary to disentangle the photoproduction mechanism on the basis of isospin I = 0, and I = 1 photo-coupling transition amplitudes. The g14 experiment with 'HDIce,' a longitudinally polarized solid target of molecular hydrogen-deuteride with low background contamination from other nuclear species, provided an unique opportunity to measure several polarization observables|for the first time|on the neutron for different channels. In particular, we present our measurements of the E beam-target polarization observable, which requires circularly polarized beam and a longitudinally polarized target, for p pi^-, K^0Lambda, and K^0Sigma^0 channels in the energy range of 1.5 lte W lte 2.3 GeV. In addition, we also utilized the g14 dataset to investigate the intrinsic spin of a possible dibaryonic ND bound state by measuring the E (beam-target) observable on the d-pi^+/-d channel of the reaction yd --> pi^+pi^-d(0). Finally, this thesis also discusses a highly efficient multivariate analysis method called Boosted Decision Trees, which we employed extensively for this work and which has not been used before in CLAS data analysis.
Ho, Dao↗
National Labs Update for Librarians [Slides]
Fermilab is one of the 17 national laboratories of the U.S. Department of Energy. Large output of scientific and technical information – Reports – Articles – Conference proceedings – OSTI.gov; SciTech Connect and PAGES; Most of the Labs will email PDFs of articles and a few will lend books.
96 KNOWLEDGE MANAGEMENT AND PRESERVATION↗
Smart Lab Renovation in TA-35-0213
For this project, the PADCAP student based integrated project team (IPT) is following the Smart Lab Initiative created by University of California Irvine (UCI). The IPT will be working on implementing this program into TA 35-0213 (Target Fab).
99 GENERAL AND MISCELLANEOUS↗
Material Protection, Accounting and Control Technologies (MPACT) Implementation Plan: Lab-Scale Demonstration of Advanced Safeguard and Security Systems
The Materials Protection, Accounting, and Control Technologies (MPACT) campaign is working towards the goal of developing and demonstrating the next generation of nuclear materials management for the peaceful use of civilian nuclear energy. A major milestone of the campaign is the “Lab-scale demonstration of an advanced safeguards and security system,” due in 2020. This implementation plan describes how tools developed in the MPACT campaign will be used to meet this milestone. These tools consist of instrumentation and devices as well as computer software for modelling, simulation and integration of data and information for safeguard and security analysis. The plan is focused on demonstrating an advanced safeguard and security systems for electrochemical processing plants, but also identifies activities needed to address advanced reactor, aqueous processing and other advanced fuel cycle facilities. A key component to achieving the 2020 milestone is the development of a virtual distributed test bed that incorporates the instruments, data, analysis tools, and models currently under development and provides a framework to link and normalize the data in a way that simulates a facility, including uncertainty quantification. This virtual distributed test bed will integrate computer simulated facilities that make up a fuel cycle of interest, with distributed test beds located in actual operating facilities and laboratories. The MPACT campaign recently issued roadmaps for both Modelling & Simulation and Advanced Integration which address this component, and activities necessary to achieve the 2020 milestone. Research, development and testing of specific technologies have been supported by the MPACT campaign in coordination with other DOE-NE and DOE-NNSA programs. These technologies provide the essential data needed by the safeguard and security systems, and feed into the data analysis and facility models. This plan will identify these technologies, their current status and activities needed to demonstrate the technologies at the laboratory scale. Wherever possible, test of technologies in field conditions using suitable nuclear materials will be used to define performance. Where necessary, surrogate materials and/or simulation will be used to provide useful information for the demonstration. When completed, the 2020 milestone will provide a demonstration of advanced safeguard and security technologies, including advanced modelling, simulation and analysis approaches, applied to electrochemical processing. It will also identify applications of the technology and approaches in other advanced fuel cycle and reactor concepts.
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL P↗
LANL Sustainability Program: Smart Labs @ Los Alamos National Laboratory [Slides]
Smart Labs are: 1) Laboratories that operate at the highest level of safety and energy performance; 2) Laboratories that use a building-specific data stream to continuously monitor and adjust facility conditions.
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗
Crab cavity requirements for the Jefferson Lab Electron-Ion Collider
An Electron-Ion Collider (EIC) has been proposed to be the next large facility to explore the dynamics of quarks and gluons inside nuclei. A conceptual design for a Jefferson Lab Electron-Ion Collider (JLEIC) is being developed. It is based on the CEBAF 12 GeV machine as a full energy electron beam injector. Two crucial requirements of JLEIC are high luminosity in the 10 34 cm -2 s -1 range, and full acceptance detection of particles. The full acceptance requirement relies on having the beams collide at a relatively large crossing angle of 50 mrad. Such a large crossing angle, however, can reduce the luminosity by as much as an order of magnitude. One way to compensate for geometric luminosity loss due to the beam crossing angle is using crab cavities. Crab cavities are superconducting radio-frequency structures optimized to produce a transverse force that 'tilts' the beam bunches in such a way that a head-on collision is restored at the collision point, thus restoring the luminosity. A second set of crab cavities is placed downstream of the collision point and is used to cancel the initial bunch tilt, ideally suppressing any crab-induced effects anywhere else in the rings. In this dissertation, we study the dynamics of JLEIC beams with a bunch crabbing scheme using particle tracking simulations. We first evaluate the beam stability when crab cavities are included in the collider rings and then use this stable model to study effects of crab cavity multipoles and RF noise. We also study the role of crab cavity higher-order modes (HOM) in driving coupled-bunch instability and identify dangerous HOM which need to be damped. A specific crab cavity for JLEIC has not yet been selected. It is the purpose of this dissertation to provide general requirements and tolerances to make future crab cavity designs compatible with JLEIC.
Sosa Guitron, Salvador↗
Manhattan District: A Lab-Embedded Entrepreneur Program
The goals of the Manhattan District are to attract top scientific innovators to New Mexico to start businesses that focus on breakthrough national security technologies, support them with access to scientific leaders, partner networks, and funding to ensure success, build economic prosperity locally and nationally, leverage national networks with UC, TAMU, Battelle and strategic partners in industry and venture capital, and build on proven models from other DOE National Labs to enhance NNSA missions.
36 MATERIALS SCIENCE↗
Double exponential approximation and inverse double exponential fit for Bell Labs and International-Military Standard EMP waveforms
We summarize here the double exponential and inverse double exponential approximations for two common EMP waveforms, the Bell Laboratories (Bell Labs) and the International- military standard (IEC-MIL-STD). Both models have been used frequently due to their relatively easy analytical expressions for both the time domain waveforms and their associated frequency domain spectra.
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSIC↗
Need something worthwhile to read and watch? The Lab’s classified library director, senior historian’s offer recommendations
Social distancing has many of us turning even more to our streaming services and e-bookshelves in our free time. But if you’re looking for something even more compelling than Tiger King, staff from the National Security Research Center (the Lab’s classified library) have some recommendations for you. NSRC Director Riz Ali and Senior Historian Alan Carr share their top picks of books and movies on Los Alamos and atomic bomb history.
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEF↗
Visit Lab’s new Trinity website for videos, posters, stories and more
History was made 75 years ago today. In the early morning hours, Los Alamos scientists, engineers, and staff successfully detonated the Gadget – a plutonium, implosion-type nuclear weapon – in the New Mexico desert during the Trinity Test on July 16, 1945. Weeks later, World War II ended and, today, Trinity’s scientific legacy endures. Watch, read and learn how Los Alamos changed the world. Visit the Lab’s new website int.lanl.gov/trinity.
99 GENERAL AND MISCELLANEOUS↗
Listen: How to make a Fat Man Step-by-step book recently added to Lab collections
The National Security Research Center has tens of millions of materials. This is the Lab’s classified library, which also houses artifacts from LANL history. Think of still-secret nuclear weapons data, old photos of the town in the 1940s, an old pair of goggles from the testing days, and so much more.
99 GENERAL AND MISCELLANEOUS↗
Chasing Fast Dynamos in the Plasma Lab
Self-generating magnetic field research is performed through the operation of the newly built Madison Plasma Dynamo Experiment (MPDX). MPDX is designed to explore a hitherto unexplored part of parameter space where dynamos operate in nature. Dynamos are systems which continuously transform kinetic energy from plasma flow into magnetic energy. Before this project, MPDX had demonstrated the ability to create steady-state, unmagnetized high conductivity, low viscosity plasmas in the lab and shown that sheared flows can be driven from the plasma boundary using an electrostatic stirring technique; the resulting Reynolds numbers and Alfvén Mach numbers easily match those required for our dynamo scenarios. The research activities included: (1) systematic undertaking of a set of plasma hydrodynamics experiments, exploring several different flow geometries, measuring plasma viscosity, how toroidal and poloidal flows self-consistently interact, observing the transition to turbulence and experimentally understanding the boundary conditions (on flow and magnetic field) that make this system unique, (2) searching for slow, laminar dynamos, and (3) searching for fast, turbulent dynamos. Discovering the conditions under which dynamos self-generate magnetic fields and then understanding how this field changes plasma dynamics is one of the most compelling questions in all of plasma astrophysics.
70 PLASMA PHYSICS AND FUSION TECHNOLOGY↗
New Mexico Small Business Assistance Program Pairs Inventors with National Labs
NMSBA provides New Mexico small businesses facing technical challenges access to the unique expertise and capabilities of Los Alamos and Sandia national laboratories. At no cost to the business, small businesses can seek assistance from lab scientists and engineers to solve challenges and overcome barriers to company success.
99 GENERAL AND MISCELLANEOUS↗
Inclusive and exclusive electron scattering data analysis from Jefferson Lab experiment E12-14-012
Since the first observations of neutrino oscillation, neutrino experiments have come a long way toward precise measurements of the neutrino oscillation parameters, but some obstacles still remain. The next generation of oscillation experiments, including the Deep Underground Neutrino Experiment (DUNE), will be using the Liquid Argon Time Projection Chambers (LArTPCs) with natural argon as the neutrino target material. A precise model of the neutrino cross section on argon does not exist, which is a source of significant uncertainty in such experiments. The E12-14-012 experiment at Jefferson Lab seeks to help remedy this via electron scattering measurements on argon and titanium targets. The experiment collected both inclusive (e,e') and exclusive (e,e'p) data at a wide range of kinematics with the intent to measure the electron-nucleus cross section and thus derive a spectral function for argon that can be used with neutrino experiments. The use of titanium in this experiment stems from the equivalent shell structure that its protons share with the neutrons in argon, which will be crucial in oscillation experiments but cannot be measured directly in electron scattering. This thesis collects several papers which present results from the E12-14-012 experiment. These results include the inclusive (e,e') cross sections for carbon, titanium, argon, and aluminum at a beam energy of 2.22 GeV and a scattering angle of 15.54 deg with uncertainty of less than 5%. Also included are the first results of the exclusive (e,e'p) cross section on argon and titanium.
Murphy, Matthew D.↗
College-bound cowboys: The Los Alamos Ranch School Before the wartime lab, Los Alamos was home to a boarding school
Summer’s over and the school year’s soon to start. What’s a kid to do? Go West, young man! Escape the city that is “making you soft” and learn self-reliance from the western U.S. of A. – or so advertised the ranch school movement in America from roughly 1900-1960. This educational movement included Los Alamos. Before being developed into a wartime lab to create atomic weapons, the mesa was home to one of the most prominent and pricey ranch schools in America.
96 KNOWLEDGE MANAGEMENT AND PRESERVATION↗
Applied Acoustics Lab Overview [Slides]
The lab of applied acoustics described focuses on development of instrumentation, methods and sensors with a focus on difficult and challenging conditions (high pressure, high temperature, corrosive media, radiation, etc.).
42 ENGINEERING↗
Just in time for Halloween: LANL science and the atomic movie genre Lab’s legacy weapons test footage used by Hollywood
As any movie buff will assure you, there is no denying the role of the Atomic Age in Hollywood. Inspired by Halloween, we thought we would do some (grave) digging into the ways Los Alamos and the Lab have been featured in the horror film genre.
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEF↗