Quantum Technology Seminar
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Numerical Modeling of Magnetic Capture of Martian Atmospheric Dust ______
____________________________________________________________________________ Numerical Modeling of Magnetic Capture of Martian Atmospheric Dust __________________________________________________________________________ Kjartan Kinch Mars Simulation Laboratory Institute of Physics and Astronomy Aarhus University, Denmark Ph.D. Thesis Revised Edition March 2005 III Table of Contents Table of Contents .................................................................................. III List of Publications...............................................................................VII Preface.................................................................................................... IX 1. Introduction.........................................................................................1 1.1. The Mars Exploration Rover mission .................................................................1 1.2. Dust in the Martian Atmosphere .........................................................................2 1.3. Magnetic Properties Experiments .......................................................................3 1.4. The Present Work................................................................................................5 1.4.1. Motivation and Method......................................................................................5 1.4.2. Structure of the Thesis .......................................................................................5 2. The Planet Mars..................................................................................7 -
Ca Li for Ni a Insc Itu Te of Techno Logy Voillme LX, Nllmber 3, I 997
Ca li for ni a Insc itu te of Techno logy SC I EN CE Voillme LX, Nllmber 3, I 997 IN THIS ISSUE Water and Ancient Mars Geology Under the Antarctic Ocean Arsenic and the L.A . Aqueduct Top: Every explorer wants to see what's on the other side of the next hill. When Sojourner, the Mars Path finder's rover, peered over a nearby crest on Sol (Mar- tian day) 76, it saw what appear to be sand dunes. If the stuff really is sand (a question that is still being debated), it implies the likely long-term prese.nce of liquid water-the most plausible agent for creating sand-sized grains. The Twin Peaks are on the horizon on the right; the "Big" Crater is on the left. Bottom: The rover took this picture of the lander, nesting comfortably in its deflated air bags, on Sol 33. You can see the for ward ramp, which sticks straight out like a diving board instead of bending down to touch the Martian surface (the rover drove off the rear ramp). And if you think you see E.T.'s face, you're not far wrong Pathfinder's camera has two "eyes" spaced 15 cen timeters apart for stereo vision. For a look at what else Pathfinder has seen, turn to page 8. " N GIN E E R I N G & C 1 ENe E Ca li for n ia Instit u te o f Tec h no logy 2 Random Wa lk 8 Pathfinder's Fi n ds - by Dougla s L. -
Workshop on Innovative Instrumentation for the in Situ Study of Atmosphere-Surface Interactions on Mars
WORKSHOP ON INNOVATIVE INSTRUMENTATION . FOR THE IN SITU STUDY OF ATMOSPHERE"SURFACE INTERACTIONS ON MARS Mars Surface and AlmOlphere Through Time LPI Technical Report N umber 92~07, Part 2 LUNAR AND PLANETARY INSTITLTTE 3600 BAY AREA BOULEVARD HOUSTON TX 77058-1113 LPIITR--92-07. Part 2 WORKSHOP ON INNOVATIVE INSTRUMENTATION FOR THE IN SITU STUDY OF ATMOSPHERE-SURFACE INTERACTIONS ON MARS Edited by Bruce Fegley Jr. and Heinrich Wanke Held at Max-Planck-Institut fur Chemie Mainz, Germany October 8-9, 1992 Sponsored by The Lunar and Planetary Institute The MSATT Study Group Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113 LPI Technical Report Number 92-07, Part 2 LPIITR--92-07, Part 2 Compiled in 1992 by LUNAR AND PLANETARY INSTITUTE The Institute is operated by Universities Space Research Association under Contract NASW-4574 with the National Aeronautics and Space Administration. Material in this document may be copied without restraint for library, abstract service, educational, or personal research purposes~ however, republication ofany portion requires the written permission ofthe authors as well as appropriate acknowledgment ofthis publication. This report may be cited as: Fegley B. Jr. and Wanke H., eds. (1992) Workshop on Innovative Instrumentation for the In Situ Study ofAtmosphere-Surface Interactions on Mars. LPI Tech. Rpt. 92-07, Part 2, Lunar and Planetary Institute, Houston. 10 pp. This report is distributed by: ORDER DEPARTMENT Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113 Mailorder requestors will be invoicedfor the cost ofshipping and handling. LPI Technical Report 92-07, Part 2 iii Program Thursday, October 8, 1992 Morning Session 09:15 WelcomebyH. -
Scientists Use the Tokyo Skytree to Test Einstein's Theory of General Relativity 9 April 2020
Scientists use the Tokyo Skytree to test Einstein's theory of general relativity 9 April 2020 Einstein theorized that the warping of time-space by gravity was caused by massive objects. In line with this, time runs more slowly in a deep gravitational field than in a shallower one. This means that times runs slightly more slowly at the base of the Skytree tower than at the top. The difficulty with actually measuring the change in how quickly clocks run in different gravity field is that the difference is very small. Performing a stringent test of the theory of relativity requires either a very precise clock or a large difference in height. One of the best measurements so far has involved large and complex clocks such as those developed by the RIKEN group, which can measure a difference of around a centimeter in height. Outside the laboratory, the best tests have been taken by satellites, with altitudes that are thousands of kilometers different. Such space experiments have constrained any violation of general relativity to about 30 parts per million, a tremendously precise measurement that essentially shows Einstein to be correct. The scientists from RIKEN and their collaborators took up the task of developing transportable optical lattice clocks that could make comparably precise tests of relativity, but on the ground. The ultimate purpose, however, is not to prove or disprove Einstein. According to Hidetoshi Katori of RIKEN Credit: CC0 Public Domain and the University of Tokyo, who led the group, "Another major application of ultraprecise clocks is to sense and utilize the curvature of spacetime by gravity. -
Koloniseringen Af Mars
Koloniseringen af Mars Morten Bo Madsen, Astrofysik og Planetforskning, Niels Bohr Institutet Marsprojektet er støttet af: 1 UNF Odense, 2018-05-01 Koloniseringen af Mars – hvad betyder det egentlig? Hvordan er der egentlig på Mars? – og hvorfor er lige Mars interessant? Hvorfor skal vi overhovedet til Mars? Kan vi gøre Mars beboelig? (- ”terraforming” af Mars) Kan vi allesammen ”bare” flytte derud? Hvad forberedes på verdensplan? (Space-X, NASA, JAXA, ESA, …) - og hvad sker der i Danmark? Koloniseringen af Mars – hvad betyder det egentlig? Hvordan er der egentlig på Mars? – og hvorfor er lige Mars interessant? Hvorfor skal vi overhovedet til Mars? Kan vi gøre Mars beboelig? (”terraforming” af Mars) Kan vi allesammen ”bare” flytte derud? Hvad forberedes på verdensplan? (Space-X, NASA, JAXA, ESA, …) - og hvad sker der i Danmark? “The goldilock Zone” Marsdag (Sol): 24 t 39 m Marsår: 1.88 Jord-år 668 Sols Halv storakse: 1.52 AU* (Nuværende) Aksehældning: 25.2° *1 AU = 149.597.871 km At leve på Mars-tid – Marsdøgnet er 24 timer og 39 minutter Hvad kræver LIV for at overleve og trives? En stabil energikilde (f.eks. en stjerne) (i flydende form – i det mindste som tynde film) ? Image credits / permission: NASA, JPL 7 Hvad kræver LIV for at overleve og trives? En stabil energikilde (Solen, jordvarme eller kemisk energi) Vand (i flydende form – i det mindste som tynde film) ? Image credits / permission: NASA, JPL 8 Hvad kræver LIV for at overleve og trives? En stabil energikilde (Solen, jordvarme eller kemisk energi) Vand (i flydende form – i -
Mars Pathfinder Landing Site Workshop
NASA-CR-196745 MARS PATHFINDER LANDING SITE WORKSHOP (NASA-CR-196745) MARS PATHFINDER N95-14276 LANDING SITE WORKSHOP Abstracts --THR U-- Only (Lunar and Planetary Inst.) N95-16208 57 P Unclas G3/91 0020918 LPI Technical Report Number 94-04 Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1 113 LPI/TR--94-04 MARS PATHFINDER LANDING SITE WORKSHOP Edited by M. Golombek Held at Houston, Texas April 18-19,1994 Sponsored by Lunar and Planetary Institute Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1 1 13 LPI Technical Report Number 94-04 LPUTR--94-04 I- Compiled in 1994 by LUNAR AND PLANETARY INSTITUTE The Institute is operated by the University Space Research Association under Contract No. NASW-4574 with the National Aeronautics and Space Administration. Material in this volume may be copied without restraint for library, abstract service, education, or personal research purposes; however, republication of any paper or portion thereof requires the written permission of the authors as well as the appropriate acknowledgment of this publication. This report may be cited as Golombek M..ed. (1994) Mars Parhfinder Landing Sire Workshop. LPI Tech. Rpt. 94-04, Lunar and Planetary Institute, Houston. 49 pp. This report is distributed by ORDER DEPARTMENT Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058- 1 I 13 Mail order requesrors will be invoiced for /he cost of shipping and handling. LPI Technical Report 94-04 iii Preface The Mars Pathfinder Project is an approved Discovery-class mission that will place a lander and rover on the surface of the Red Planet in July 1997. -
University of Copenhagen
From Automatic to Adaptive Data Acquisition - towards scientific sensornets Chang, Marcus Publication date: 2009 Document version Også kaldet Forlagets PDF Citation for published version (APA): Chang, M. (2009). From Automatic to Adaptive Data Acquisition: - towards scientific sensornets. Download date: 02. okt.. 2021 DEPARTMENT OF COMPUTER SCIENCE FACULTY OF SCIENCE UNIVERSITY OF COPENHAGEN PhD thesis Marcus Chang From Automatic to Adaptive Data Acquisition - towards scientific sensornets November 2009 Submission: November 2009 Copyright c 2009, Marcus Chang All rights reserved. A Typesetted with LTEX 2 Preface The following dissertation concludes my studies at the University of Copen- hagen. It is a synopsis of five papers in the field of sensornets and ecological monitoring. Three of these papers have been published and two are currently under review. The journey has been long, with detours to both physics and astronomy, but not as long as the list of people I wish to thank: My advisor, Philippe Bonnet, for guiding me through both rounds of gradu- ate school and sending me on cool trips around the World. Special thanks to Prof. Andreas Terzis, for hosting my visits at the Johns Hopkins University, and all the great grad students at the Wymann Park lab for all the fun and great food. Kirsten S. Christoffersen for two awesome field trips to Greenland; I hope the animals will leave our equipment alone this season. Our departmental PhD Secretary, Marianne Henriksen, for administrative support and always getting the job done. Be well. Friends and family for encouragement and support. Especially, Henrik Juul Nielsen for proofreading and Anders Siegumfeldt for sparring. -
Ultrahigh Precision Time Measurement Technologies Leading to a New Time-Business
Ultrahigh precision time measurement technologies leading to a new time-business Space-time information platform with a cloud of optical lattice clocks Project Leader: Hidetoshi Katori Professor, Graduate School of Engineering, The University of Tokyo /Chief Scientist, Quantum Metrology Laboratory R&D Team:The University of Tokyo, RIKEN, NTT LTD., Shimadzu CO., JEOL Ltd., NICT, AIST, SIGMAKOKI, The University of Electro-Communications, Fukuoka University, JAXA, AISIN CORPORATION, NAOJ, GSI Summary: The optical lattice clock, taken as a ridiculous idea in 2001, has come true and changed the game for building highly precise and stable atomic clocks. In this project, we will develop a space-time information platform by networking “optical lattice clocks”, which improve the uncertainty of atomic clocks used in GNSS (Global Navigation Satellite System) by three orders of magnitude. Such a platform will benefit future high-capacity network systems, navigation, and other services. Since the dawn of history, mankind has elaborated technologies for timekeeping and developed applications to fully use time resources. These technologies have triggered a paradigm-shift in communication and information technologies. In order to facilitate a new breakthrough in industrial and academic fields introduced by highly-precise clocks, we will develop transportable and compact “optical lattice clocks” that allow remote maintenance and unattended operation. By networking them via phase-stabilized fibers, we will demonstrate clocks’ application to relativistic geodesy and establish a space-time information platform that will substitute GNSS. https://www.katori-project.t.u-tokyo.ac.jp/index.html. -
NOVA – Curiosity (Pdf)
Mars-sonden “Curiosity” til Gale-krateret Hvad er nyt under Solen? – og lidt om danske bidrag Morten Bo Madsen, Astrofysik og Planetforskning, Niels Bohr Institutet NOVA, 2012-03-06 1 Først lidt historie: Viking-missionerne havde til formål at lede efter liv på MARS • NASA's Viking-missioner i 70'erne viste at det ikke er “ligetil” at finde liv på Mars: • 3 ud af 4 biologi-eksperimenter: “+”, et: “–”! • Kun spor af organisk kemi … • Mars-jord kraftigt oxyderende (mere herom senere) • Derfor har både NASA og ESA sidenhen grebet tingene mere systematisk til værks ... Først lidt historie: Viking-missionerne havde til formål at lede efter liv på MARS • NASA's Viking-missioner i 70'erne viste at det ikke er “ligetil” at finde liv på Mars: • 3 ud af 4 biologi-eksperimenter: “+”, et: “–”! • Kun spor af organisk kemi … • Mars-jord kraftigt oxyderende (mere herom senere) • Derfor har både NASA og ESA sidenhen grebet tingene mere systematisk til værks ... Søren E. Larsen fra DTU’s vestlige filial (dengang Risø Nationallaboratorium) studerede vind på Mars på denne mission. Mars Pathfinder 1997 Med inspiration fra Viking foreslog Jens Martin Knudsen en række magnet- eksperimenter – disse fløj første gang på Mars Pathfinder Image credits / permission: Imager for Mars Pathfinder (IMP) Logo University of Arizona , NASA, JPL and the Niels Bohr Institute Credits / permission: University of Arizona Mars Pathfinder magnet-eksperimenter Resultater: 2 -1 Gennemsnitlig mætningsmagnetisering af indfanget støv 1-6 Am kg Partiklerne er sammensatte af individuelle -
Optical Clocks and Fiber Links 1 Introduction the Primary Microwave
Optical clocks and fiber links J. Lodewyck LNE-SYRTE, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universit´es, UPMC Univ. Paris 06, LNE, 61 avenue de l'Observatoire 75014 Paris, France Optical clocks are now the most stable and accurate frequency standards, with performances 18 in the low 10− , outperforming by two orders of magnitude the best microwave primary stan- dards based on cesium. This opens the question of a possible redefinition of the SI (Syst`eme International) second with an optical transition. However, several operational steps have to be demonstrated before such a redefinition can be effective: reliable and interconnected clocks are necessary to realize the definition. Here, we report on several experimental advents in this direction, including the remote comparison of optical lattice clocks via phase compensated optical fiber links between different metrology institutes across Europe. 1 Introduction The primary microwave cesium clock, the cold atom fountain being its most accurate imple- mentation, are currently realizing the SI and are used to build international timescales such as TAI (Temps Atomique International) and its derivative UTC (Universal Time Coordinated). The widespread usage of fountain clocks for these application relies on four pillars. First, the availability in several metrology institutes of highly reliable atomic fountains makes possible a continuous operation. Second, these remote clocks are interconnected by satellite-based mi- crowave links, in oder to compare them. Third, repeated measurement of frequency ratios between cesium clocks and between cesium and rubidium clocks have confirmed their accuracy budget, evaluated at a few parts in 1016. Finally, regular calibrations of TAI reported to the Bureau International des Poids et Mesures (BIPM) make them key players in building accurate time scales 1. -
Workshop on Early Mars (1997) 3017.Pdf the MAGNETIC PROPERTIES EXPERIMENT on MARS PATHFINDER
Workshop on Early Mars (1997) 3017.pdf THE MAGNETIC PROPERTIES EXPERIMENT ON MARS PATHFINDER. Jens Martin Knudsen, Haraldur Pall Gunnlaugsson, Morten Bo Madsen, Stubbe F. Hviid, Walter Goetz, Niels Bohr Institute for Astronomy, Physics and Geo- physics, Universitetsparken 5, DK-2100 Copenhagen , Denmark. Introduction 2 A remarkable result from the Viking missions to Mars in 1976 was the discovery that the Martian soil is highly magnetic, in the sense that the soil is attracted by small permanent 1 magnets [1,2]. 4 The Viking landers carried two types of permanent mag- 3 nets, a weak and a strong magnet. The surface magnetic field and surface magnetic field gradient of the strong type magnet 1 were 250 mT and 100 Tm , respectively. The corresponding 1 numbers for the weak magnet were 70 mT and 30 Tm . Both types were mounted on the backhoe of the soil sampler, where they were exposed to the soil. A strong type magnet 5 was mounted in the Reference Test Chart (RTC) which was exposed to wind born particles exclusively. At both landing sites both backhoemagnets were saturated 3 with magnetic particles after few insertions into the soil. The RTC magnets gradually became saturated with magnetic dust during the mission. ath nder lander. The lab els refer to 1: Based on the returned pictures of the amount of soil Figure 1: The P wo sets of Magnet Arrays, 2: Tip Plate Magnet, 3: clinging to the magnets, it was estimated that the Martian The t dust contain between 1% and 7% of a strongly magnetic Ramp Magnets, 4: Imager IMP and 5: The So journer ver. -
Annual Report 2015 the Niels Bohr Archive Is an Independent Institution Under the University of Copenhagen
THE NIELS BOHR ARCHIVE Annual Report 2015 The Niels Bohr Archive is an independent institution under the University of Copenhagen. Staff Director Finn Aaserud Academic Assistant Felicity Pors Librarian/Secretary Anne Lis Rasmussen IT collaborator H˚akon Bergset (part time) Research Associate Helge Kragh (emeritus professor, NBI) Research Associate Helle Kiilerich Postdoc Thiago Hartz (through January) Postdoc Christian Joas (from June) Job training Jesper Øland (January to April) Student research assistant Josephine Musil-Gutsch (August and September) Board of directors For the Vice-Chancellor of the University of Copenhagen Karin Tybjerg For the Niels Bohr Institute (NBI) N.O. Andersen For the Royal Danish Academy of Sciences and Letters Jørgen Christensen{Dalsgaard For the Danish National Archives (Rigsarkivet) Asbjørn Hellum For the family of Niels Bohr Vilhelm Bohr (chair) Scientific Advisory Board Olival Freire, Jr. Universidade Federal da Bahia, Brazil Gregory Good (chair) Center for History of Physics American Institute of Physics, U.S.A. Karl Grandin Center for History of Science, Royal Academy of Science, Sweden 1 Kirsten Hastrup Royal Danish Academy of Sciences and Letters, Denmark John L. Heilbron University of California at Berkeley, U.S.A. Liselotte Højgaard Copenhagen University Hospital, Denmark J¨urgenRenn Max Planck Institute for the History of Science, Germany Fujia Yang Fudan University, China General remarks The Niels Bohr Archive (NBA) { website www.nbarchive.dk { is a repository of primary material for the history of modern physics, pertaining in particular to the early development of quantum me- chanics and the life and career of Niels Bohr. Although NBA has existed since shortly after Bohr's death in 1962, its future was only secured at the centennial of Bohr's birth in 1985, after a deed of gift from Bohr's wife, Margrethe, provided the opportunity to es- tablish NBA as an independent not-for-profit institution.