Detection of Space Reactors by Their Gamma‐Ray and Positron Emissions
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Mission to Jupiter
This book attempts to convey the creativity, Project A History of the Galileo Jupiter: To Mission The Galileo mission to Jupiter explored leadership, and vision that were necessary for the an exciting new frontier, had a major impact mission’s success. It is a book about dedicated people on planetary science, and provided invaluable and their scientific and engineering achievements. lessons for the design of spacecraft. This The Galileo mission faced many significant problems. mission amassed so many scientific firsts and Some of the most brilliant accomplishments and key discoveries that it can truly be called one of “work-arounds” of the Galileo staff occurred the most impressive feats of exploration of the precisely when these challenges arose. Throughout 20th century. In the words of John Casani, the the mission, engineers and scientists found ways to original project manager of the mission, “Galileo keep the spacecraft operational from a distance of was a way of demonstrating . just what U.S. nearly half a billion miles, enabling one of the most technology was capable of doing.” An engineer impressive voyages of scientific discovery. on the Galileo team expressed more personal * * * * * sentiments when she said, “I had never been a Michael Meltzer is an environmental part of something with such great scope . To scientist who has been writing about science know that the whole world was watching and and technology for nearly 30 years. His books hoping with us that this would work. We were and articles have investigated topics that include doing something for all mankind.” designing solar houses, preventing pollution in When Galileo lifted off from Kennedy electroplating shops, catching salmon with sonar and Space Center on 18 October 1989, it began an radar, and developing a sensor for examining Space interplanetary voyage that took it to Venus, to Michael Meltzer Michael Shuttle engines. -
AAS Worldwide Telescope: Seamless, Cross-Platform Data Visualization Engine for Astronomy Research, Education, and Democratizing Data
AAS WorldWide Telescope: Seamless, Cross-Platform Data Visualization Engine for Astronomy Research, Education, and Democratizing Data The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters Citation Rosenfield, Philip, Jonathan Fay, Ronald K Gilchrist, Chenzhou Cui, A. David Weigel, Thomas Robitaille, Oderah Justin Otor, and Alyssa Goodman. 2018. AAS WorldWide Telescope: Seamless, Cross-Platform Data Visualization Engine for Astronomy Research, Education, and Democratizing Data. The Astrophysical Journal: Supplement Series 236, no. 1. Published Version https://iopscience-iop-org.ezp-prod1.hul.harvard.edu/ article/10.3847/1538-4365/aab776 Citable link http://nrs.harvard.edu/urn-3:HUL.InstRepos:41504669 Terms of Use This article was downloaded from Harvard University’s DASH repository, and is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http:// nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of- use#OAP Draft version January 30, 2018 Typeset using LATEX twocolumn style in AASTeX62 AAS WorldWide Telescope: Seamless, Cross-Platform Data Visualization Engine for Astronomy Research, Education, and Democratizing Data Philip Rosenfield,1 Jonathan Fay,1 Ronald K Gilchrist,1 Chenzhou Cui,2 A. David Weigel,3 Thomas Robitaille,4 Oderah Justin Otor,1 and Alyssa Goodman5 1American Astronomical Society 1667 K St NW Suite 800 Washington, DC 20006, USA 2National Astronomical Observatories, Chinese Academy of Sciences 20A Datun Road, Chaoyang District Beijing, 100012, China 3Christenberry Planetarium, Samford University 800 Lakeshore Drive Birmingham, AL 35229, USA 4Aperio Software Ltd. Headingley Enterprise and Arts Centre, Bennett Road Leeds, LS6 3HN, United Kingdom 5Harvard Smithsonian Center for Astrophysics 60 Garden St. -
Space Astronomy in the 90S
Space Astronomy in the 90s Jonathan McDowell April 26, 1995 1 Why Space Astronomy? • SHARPER PICTURES (Spatial Resolution) The Earth’s atmosphere messes up the light coming in (stars twinkle, etc). • TECHNICOLOR (X-ray, infrared, etc) The atmosphere also absorbs light of different wavelengths (col- ors) outside the visible range. X-ray astronomy is impossible from the Earth’s surface. 2 What are the differences between satellite instruments? • Focussing optics or bare detectors • Wavelength or energy range - IR, UV, etc. Different technology used for different wavebands. • Spatial Resolution (how sharp a picture?) • Spatial Field of View (how large a piece of sky?) • Spectral Resolution (can it tell photons of different energies apart?) • Spectral Field of View (bandwidth) • Sensitivity • Pointing Accuracy • Lifetime • Orbit (hence operating efficiency, background, etc.) • Scan or Point What are the differences between satellites? • Spinning or 3-axis pointing (older satellites spun around a fixed axis, precession let them eventually see different parts of the sky) • Fixed or movable solar arrays (fixed arrays mean the spacecraft has to point near the plane perpendicular to the solar-satellite vector) 3 • Low or high orbit (low orbit has higher radiation, atmospheric drag, and more Earth occultation; high orbit has slower preces- sion and no refurbishment opportunity) • Propulsion to raise orbit? • Other consumables (proportional counter gas, attitude control gas, liquid helium coolant) 4 What are the differences in operation? • PI mission vs. GO mission PI = Principal Investigator. One of the people responsible for building the satellite. Nowadays often referred to as IPIs (In- strument PIs). GO = Guest Observer. Someone who just want to use the satel- lite. -
Particle Acceleration in Solar Flares What Is the Link Between Heating and Particle Acceleration?
Energetic Particles in the Solar Atmosphere (X- ray diagnostics) Nicole Vilmer LESIA, Observatoire de Paris, CNRS, UPMC, Université Paris-Diderot The Sun as a Particle Accelerator: First detection of energetic protons from the Sun(1942) (related to a solar flare) First X-ray observations of solar flares (1970) Chupp et al., 1974 First observations of -ray lines from solar flares (OSO7/Prognoz 1972) Since then many more observations With e.g. RHESSI (2002-2018) And also INTEGRAL, FERMI >120000 X-ray flares observed by RHESSI (NASA/SMEX; 2002-2018) But still a limited number of gamma- ray line flares ~30 Solar flare: Sudden release of magnetic energy Heating Particle acceleration X-rays 6-8 keV 25-80 keV 195 Å 304 Å 21 aug 2002 (extreme ultraviolet) 335 Å 15 fev 2011 HXR/GR diagnostics of energetic electrons and ions SXR emission Hot Plasma (7to 8 MK ) HXR emission Bremsstrahlung from non-thermal electrons Prompt -ray lines : Deexcitation lines(C and 0) (60%) Signature of energetic ions (>2 MeV/nuc) Neutron capture line: p –p ; p-α and p-ions interactions Production of neutrons Collisional slowing down of neutrons Radiative capture on ambient H deuterium + 2.2 MeV. line RHESSI Observations X/ spectrum Thermal components T= 2 10 7 K T= 4 10 7 K Electron bremsstrahlung Ultrarelativistic -ray lines Electron (ions > 3 MeV/nuc) Bremsstrahlung (INTEGRAL) SMM/GRS PHEBUS/GRANAT FERMI/LAT observations RHESSI Pion decay radiation(ions > ~300MeV/nuc) Particle acceleration in solar flares What is the link between heating and particle acceleration? Where are the acceleration sites? What is the transport of particles from acceleration sites to X/ γ ray emission sites? What are the characteristic acceleration times? RHESSI How many energetic particles? Energy spectra? Relative abundances of energetic ions? RHESSI Which acceleration mechanisms in solar flares? Shock acceleration? Stochastic acceleration? (wave-particle interaction) Direct Electric field acceleration. -
NETS 2020 Template
بÀƵƧǘȁǞƧƊǶ §ȲȌǐȲƊǿ ƊƧDzɈȌɈǘƵwȌȌȁƊȁƮȌȁ ɈȌwƊȲȺɈǘȲȌɐǐǘƊƮɨƊȁƧǞȁǐ خȁɐƧǶƵƊȲɈƵƧǘȁȌǶȌǐǞƵȺƊȁƮ ǞȁȁȌɨƊɈǞȌȁ ǞȺ ȺȯȌȁȺȌȲƵƮ Ʀɯ ɈǘƵ ƊDz ªǞƮǐƵ yƊɈǞȌȁƊǶ ׁׂ׀ׂ y0À² ÀǘǞȺ ƧȌȁǏƵȲƵȁƧƵ خׁׂ׀ׂ ةɈǘ׀׃ƊȁƮ ɩǞǶǶƦƵ ǘƵǶƮ ǏȲȌǿȯȲǞǶ ׂ׆ɈǘٌةmƊƦȌȲƊɈȌȲɯ ɩǞǶǶ ƦƵ ǘƵǶƮ ɨǞȲɈɐƊǶǶɯ ȺȌ ɈǘƊɈ ɈǘƵ ƵȁɈǞȲƵ y0À² خƧȌǿǿɐȁǞɈɯǿƊɯȯƊȲɈǞƧǞȯƊɈƵǞȁɈǘǞȺƵɮƧǞɈǞȁǐǿƵƵɈǞȁǐ ǐȌɨخȌȲȁǶخخׁׂ׀ȁƵɈȺׂششبǘɈɈȯȺ Nuclear and Emerging Technologies for Space Sponsored by Oak Ridge National Laboratory, April 26th-30th, 2021. Available online at https://nets2021.ornl.gov Table of Contents Table of Contents .................................................................................................................................................... 1 Thanks to the NETS2021 Sponsors! ...................................................................................................................... 2 Nuclear and Emerging Technologies for Space 2021 – Schedule at a Glance ................................................. 3 Nuclear and Emerging Technologies for Space 2021 – Technical Sessions and Panels By Track ............... 6 Nuclear and Emerging Technologies for Space 2021 – Lightning Talk Final Program ................................... 8 Nuclear and Emerging Technologies for Space 2021 – Track 1 Final Program ............................................. 11 Nuclear and Emerging Technologies for Space 2021 – Track 2 Final Program ............................................. 14 Nuclear and Emerging Technologies for Space 2021 – Track 3 Final Program ............................................. 18 -
Centaurus a at Hard X-Rays and Gamma Rays
Centaurus A at Hard X-Rays and Soft Gamma-Rays Chandra 1-10 keV CGRO-COMPTEL 1 ± 30 MeV Fermi 100 MeV ± 100 GeV Helmut Steinle Max-Planck-Institut für extraterrestrische Physik Garching, Germany ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- The Many Faces of Centaurus A ± Sydney, 28 June ± 3 July 2009; H. Steinle, MPE 1 / 35 Centaurus A at Hard X-Rays and Soft Gamma-Rays Contents · Introduction · The Spectral Energy Distribution · Properties of the existing measurements in the hard X-ray / soft Gamma-ray regime · Important satellites for this energy / frequency range · Variability of the X-ray / Gamma-ray emission · Two examples of models for the Cen A Spectral Energy Distribution · Problems (features) to be considered when using the hard X-ray / soft Gamma-ray data ± the ªsoft X-ray transient problemº ± the ªSED problemº · Outlook ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- The Many Faces of Centaurus A ± Sydney, 28 June ± 3 July 2009; H. Steinle, MPE 2 / 35 Centaurus A at Hard X-Rays and Soft Gamma-Rays ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Introduction In the introductory (ªsetting the stageº) section of the -
Lightweight, High-Temperature Radiator for In-Space Nuclear- Electric Power and Propulsion
University of Massachusetts Amherst ScholarWorks@UMass Amherst Doctoral Dissertations Dissertations and Theses Summer November 2014 Lightweight, High-Temperature Radiator for In-Space Nuclear- Electric Power and Propulsion Briana N. Tomboulian University of Massachusetts Amherst Follow this and additional works at: https://scholarworks.umass.edu/dissertations_2 Part of the Heat Transfer, Combustion Commons, Propulsion and Power Commons, and the Systems Engineering and Multidisciplinary Design Optimization Commons Recommended Citation Tomboulian, Briana N., "Lightweight, High-Temperature Radiator for In-Space Nuclear-Electric Power and Propulsion" (2014). Doctoral Dissertations. 247. https://doi.org/10.7275/5972048.0 https://scholarworks.umass.edu/dissertations_2/247 This Open Access Dissertation is brought to you for free and open access by the Dissertations and Theses at ScholarWorks@UMass Amherst. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of ScholarWorks@UMass Amherst. For more information, please contact [email protected]. Lightweight, High-Temperature Radiator for In-Space Nuclear-Electric Power and Propulsion A Dissertation Presented by BRIANA N. TOMBOULIAN Submitted to the Graduate School of the University of Massachusetts Amherst in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY September 2014 Mechanical and Industrial Engineering Department © Copyright by Briana N. Tomboulian 2014 All Rights Reserved Lightweight, High-Temperature Radiator -
Human Mars Mission Architecture Plan to Settle the Red Planet with 1000 People
Human Mars Mission Architecture Plan to Settle the Red Planet with 1000 People Malaya Kumar Biswal M1, Vishnu S2, Devika S Kumar3, Sairam M4 Pondicherry University, Kalapet, Puducherry, India - 605 014 Abstract Exploration is one of the attentive endeavor to mankind and a strategy for evolution. We have been incessantly reconnoitering our planet and universe from Mesopotamian era to modern era. The progression of rocketry and planetary science in past century engendered a futuristic window to explore Mars which have been a source of inspiration to hundreds of astronomers and scientists. Globally, it invigorated space exploration agencies to make expedition for planetary exploration to Mars and Human Mars Missions. Scientists and engineers have portrayed numerous Human Mars Mission proposals and plans but currently the design reference mission 5.0 of NASA is the only mission under study. Here we propose a mission architecture for permanent Human Mars Settlement with 1000 peoples with multiple launch of sufficient cargoes and scientific instruments. Introduction: This paper focuses on design of Human Mars Mission with reference to the instructions by Mars Society. We proposed mission architecture for carrying 1000 peoples onboard spaceship (Marship). Overall mission architecture outline map and Human Mars Settlement Map is provided next to this page. We divided the whole mission architecture into three phases starting from orbital launch of launch vehicles and Mars colony establishment. We proposed novel habitat for protection during robust dust storms, various method to make the colony economically successful, minerals and their applications, administrative methods, water extraction, plantation, landing patterns, estimation of masses of food to be carried out and customizable system for re-use and recycling. -
An Economic Assessment of Space Solar Power As a Source of Electricity for Space-Based Activities
An Economic Assessment of Space Solar Power as a Source of Electricity for Space-Based Activities Molly K. Macauley and James F. Davis October 2001 • Discussion Paper 01–46 Resources for the Future 1616 P Street, NW Washington, D.C. 20036 Telephone: 202–328–5000 Fax: 202–939–3460 Internet: http://www.rff.org © 2001 Resources for the Future. All rights reserved. No portion of this paper may be reproduced without permission of the authors. Discussion papers are research materials circulated by their authors for purposes of information and discussion. They have not necessarily undergone formal peer review or editorial treatment. An Economic Assessment of Space Solar Power as a Source of Electricity for Space-Based Activities Molly K. Macauley and James F. Davis Abstract We develop a conceptual model of the economic value of space solar power (SSP) as a source of power to in-space activities, such as spacecraft and space stations. We offer several estimates of the value based on interviews and published data, discuss technological innovations that may compete with or be complementary to SSP, and consider alternative institutional arrangements for government and the private sector to provide SSP. Key Words: innovation, government policy JEL Classification Numbers: O33, O32, L98 ii Contents I. Introduction and Overview ................................................................................................ 1 I. a. What Is SSP? .............................................................................................................. -
Experiments on the Differential Vlbi Measurements with the Former Russian Deep Space Network
EXPERIMENTS ON THE DIFFERENTIAL VLBI MEASUREMENTS WITH THE FORMER RUSSIAN DEEP SPACE NETWORK Igor E. Molotov(1,2,3) (1)Bear Lakes Radio Astronomy Station of Central (Pulkovo) Astronomical Observatory, Pulkovskoye chosse 65/1, Saint-Petersburg, 196140, Russia , E-mail: [email protected] (2)Keldysh Institute of Applied Mathematics, Miusskaja sq. 4, 125047 Moscow, Russia (3)Central Research Institute for Machine Building, 4 Pionerskaya Street, Korolev, 141070, Russia ABSTRACT The differential VLBI technique (delta-VLBI) is applied transforms the signals into video frequencies, which for measuring spacecraft position with accuracy up to 1 then are sampled with 1- or 2-bit quantization, formatted in any standard VLBI format (Mk-4, S2, K-4, mas. This procedure allows to link the sky position of object with the position of close ICRF quasar on the Mk-2) and recorded on magnetic tapes or PC-disks celestial sphere. Few delta-VLBI measurements can together with precise clock using VLBI terminal. All frequency transformations are connected with atomic urgently improve the knowledge of object trajectory in the times of critical maneuvers. frequency standard. The tapes/disks from all radio telescopes of VLBI array are collected at data The Russian Deep Space Network that was based on processing center, where the data are cross-correlated. three large antennas: 70 m in Evpatoria (Ukraine) and The processing is aimed to measure the time delay of Ussuriysk (Far East), and 64 m in Bear Lakes (near emitted wavefront arrival to receiving antennas, and Moscow) arranged the trial delta-VLBI experiments frequency of interference (fringe rate), that contain the with help of four scientific institutions. -
Nuclear Reactors for Space Power, Understanding the Atom Series
4:=:* irni a I_ = 11111 1 1. 0 .A1-11 C=3. 1=3.- i=a DOCUMENT RESUME ED 054 966 SE 012 470 AUTHOR Corliss, William R. TITLE Nuclear Reactors for Space Power, Understanding the Atom Series. INSTITUTION Atomic Energy Commission, Oak Ridge, Tenn. Div. of Technical Information. PUB DATE 71 NOTE 52p.; Revised AVAILABLE FROM USAEC, P. O. Box 62, Oak Ridge, Tennessee 37830 (Free) EDRS PRICE MF-$0.65 HC-$3.29 DESCRIPTORS *Aerospace Technology; College Science; Instructional Materials; *Nuclear Physics; Physics; Resource Materials; Secondary School Science IDENTIFIERS Atomic Energy Commission ABSTRACT The historical development of rocketry and nuclear technology includes a specific description of Systems forNuclear Auxiliary Power (SNAP) programs. Solar cells and fuelcells are considered as alternative power supplies for space use.Construction and operation of space power plants must includeconsiderations of the transfer of heat energy to electricity andof waste heat dissipation. The shielding of such plants is important,from both efficiency and safety standpoints. The safety of nuclearmaterial handling in space flight is especially crucial. Variousimprovements are proposed concerning present powerplantsLists of relevant reading topics and of motion pictures are included. (TS) LI S DEPARTMENT OF HEALTH, EDUCATION &WELFARE OFFICE OF EDUCATION THIS DOCUMENT HAS BEEN REPRO- DUCED EY,ACTLY AS RECEIVED FROM THE PERSON OR ORGANIZATION ORIG- INATING IT POINTS OF VIEW OR OPIN- -511, IONS STATED DO NOT NECESSARILY , REPRESENT OFFICIAL OFFICE OF EDU- CATION POSITION OR POLICY '4)4f i_NuclearI Reactors for Space Power by William R. Corliss Understanding the Atom Series Booklet ,The Understanding the Atom Series Nuclear energy is playing a vital role in the life of every man, woman, and child in theUnited States today. -
The Need for Nuclear Power in Space Exploration
Nuclear Power in Space Exploration and the Associated Environmental Safeguards: An Overview by Michael D. Campbell, P.G., P.H. Chair, Uranium Committee Energy Minerals Division, AAPG and Member of the Astrogeology Committee, AAPG and Managing Partner M. D. Campbell and Associates, L.P. Houston and Seattle January, 2009 HGS Dinner Mtg of the Environmental and Engineering Section Investigation Participants A Report of the Uranium Committee of the Energy Minerals Division, AAPG by Michael D. Campbell, P.G., P.H., (Chair) Houston Jeffery D. King, P.G. (Associate) Seattle Henry M. Wise, P.G. (Member) Houston Bruce N. Handley, P.G. (Member) Houston M. David Campbell, P.G. (Associate) Houston Report Outline Introduction …………………………………….. Satellites ………………………………………… Lunar-Solar or Lunar-Nuclear Power ………… Spacecraft Propulsion ………………………….. Planet-Based Power Systems ……... Earth-Based Power Systems ……… Environmental Safeguards in Orbit …………….. Other Environmental Considerations in Space ... International Development The Nuclear Genie is Out of the Bottle …………. Research and Development: ……………………. Small Earth-Based NPSs ………………… Direct-Conversion Systems …………… Problems to be Solved ………………………….. Off-World Mining: ……………………………… The Debate on a Lunar or Mars Base … Mining Asteroids ……………………… The Space Elevator …………………………….. Near-Earth Asteroids and Comets ….................... Earth-Based Spin Off from Space Research …. Conclusions ……………………………………... Acknowledgements ……………………………… References (with links) …………………………… Outline for this Presentation • Spacecraft