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Nicholas Christofilos and the Astron Project in America's Fusion Program
Elisheva Coleman May 4, 2004 Spring Junior Paper Advisor: Professor Mahoney Greek Fire: Nicholas Christofilos and the Astron Project in America’s Fusion Program This paper represents my own work in accordance with University regulations The author thanks the Program in Plasma Science and Technology and the Princeton Plasma Physics Laboratory for their support. Introduction The second largest building on the Lawrence Livermore National Laboratory’s campus today stands essentially abandoned, used as a warehouse for odds and ends. Concrete, starkly rectangular and nondescript, Building 431 was home for over a decade to the Astron machine, the testing device for a controlled fusion reactor scheme devised by a virtually unknown engineer-turned-physicist named Nicholas C. Christofilos. Building 431 was originally constructed in the late 1940s before the Lawrence laboratory even existed, for the Materials Testing Accelerator (MTA), the first experiment performed at the Livermore site.1 By the time the MTA was retired in 1955, the Livermore lab had grown up around it, a huge, nationally funded institution devoted to four projects: magnetic fusion, diagnostic weapon experiments, the design of thermonuclear weapons, and a basic physics program.2 When the MTA shut down, its building was turned over to the lab’s controlled fusion department. A number of fusion experiments were conducted within its walls, but from the early sixties onward Astron predominated, and in 1968 a major extension was added to the building to accommodate a revamped and enlarged Astron accelerator. As did much material within the national lab infrastructure, the building continued to be recycled. After Astron’s termination in 1973 the extension housed the Experimental Test Accelerator (ETA), a prototype for a huge linear induction accelerator, the type of accelerator first developed for Astron. -
The Birth and Childhood of a Couple of Twin Brothers V
Proceedings of ICFA Mini-Workshop on Impedances and Beam Instabilities in Particle Accelerators, Benevento, Italy, 18-22 September 2017, CERN Yellow Reports: Conference Proceedings, Vol. 1/2018, CERN-2018-003-CP (CERN, Geneva, 2018) THE BIRTH AND CHILDHOOD OF A COUPLE OF TWIN BROTHERS V. G. Vaccaro, INFN Sezione di Napoli, Naples, Italy Abstract The context in which the concepts of Coupling Imped- Looking Far ance and Universal Stability Charts were born is de- scribed in this paper. The conclusion is that the simulta- Even before the successful achievements of PS and neous appearance of these two concepts was unavoidable. AGS, the scientific community was aware that another step forward was needed. Indeed, the impact of particles INTRODUCTION against fixed targets is very inefficient from the point of view of the energy actually available: for new experi- At beginning of 40’s, the interest around proton accel- ments, much more efficient could be the head on colli- erators seemed to quickly wear out: they were no longer sions between counter-rotating high-energy particles. able to respond to the demand of increasing energy and intensity for new investigations on particle physics. With increasing energy, the energy available in the Inertial Frame (IF) with fixed targets is incomparably Providentially important breakthrough innovations smaller than in the head-on collision (HC). If we want the were accomplished in accelerator science, which pro- same energy in IF using fixed targets, one should build duced leaps forward in the performances of particle ac- gigantic accelerators. In the fixed target case (FT), ac- celerators. cording to relativistic dynamics, an HC-equivalent beam should have the following energy. -
Cyclotrons: Old but Still New
Cyclotrons: Old but Still New The history of accelerators is a history of inventions William A. Barletta Director, US Particle Accelerator School Dept. of Physics, MIT Economics Faculty, University of Ljubljana US Particle Accelerator School ~ 650 cyclotrons operating round the world Radioisotope production >$600M annually Proton beam radiation therapy ~30 machines Nuclear physics research Nuclear structure, unstable isotopes,etc High-energy physics research? DAEδALUS Cyclotrons are big business US Particle Accelerator School Cyclotrons start with the ion linac (Wiederoe) Vrf Vrf Phase shift between tubes is 180o As the ions increase their velocity, drift tubes must get longer 1 v 1 "c 1 Ldrift = = = "# rf 2 f rf 2 f rf 2 Etot = Ngap•Vrf ==> High energy implies large size US Particle Accelerator School ! To make it smaller, Let’s curl up the Wiederoe linac… Bend the drift tubes Connect equipotentials Eliminate excess Cu Supply magnetic field to bend beam 1 2# mc $ 2# mc " rev = = % = const. frf eZion B eZion B Orbits are isochronous, independent of energy ! US Particle Accelerator School … and we have Lawrence’s* cyclotron The electrodes are excited at a fixed frequency (rf-voltage source) Particles remain in resonance throughout acceleration A new bunch can be accelerated on every rf-voltage peak: ===> “continuous-wave (cw) operation” Lawrence, E.O. and Sloan, D.: Proc. Nat. Ac. Sc., 17, 64 (1931) Lawrence, E.O. & Livingstone M.S.: Phys. Rev 37, 1707 (1931). * The first cyclotron patent (German) was filed in 1929 by Leó Szilard but never published in a journal US Particle Accelerator School Synchronism only requires that τrev = N/frf “Isochronous” particles take the same revolution time for each turn. -
October 1986
C Fermi National Accelerator Laboratory Monthly Report October 1986 'Ht», i't:.t"tS?t M Fermi/ab Report is published monthly by the Fermi National Accelerator Laboratory Technical Publications Office, P.O. Box 500, MS 107, Batavia, IL, 60510 U.S.A. (312) 840-3278 Editors: R.A. Carrigan, Jr., F.T. Cole, R. Fenner, L. Voyvodic Contributing Editors: D. Beatty, M. Bodnarczuk, R. Craven, D. Green, L. McLerran, S. Pruss, R. Vidal Editorial Assistant: S. Winchester The presentation of material in Fermilab Report is not intended to substitute for nor preclude its publication in a professional journal, and references to articles herein should not be cited in such journals. Contributions, comments, and requests for copies should be addressed to the Fermilab Technical Publications Office. 86/8 Fermi National Accelerator Laboratory 0090.01 011 the cover: M. Stanley Livingston (May 25, 1905 - August 25, 1986) and Ernest 0. Lawrence beside one of the earliest cyclotrons ca. 1933. A remembrance of M.S. Livingston begins on page 21 of this issue. Operated by Universities Research Association, Inc., under contract with the United States Department of Energy Table of Contents Who's Who in the Upcoming Fixed-Target Run? Mark W. Bodnarczuk Saturday Morning Physics: a Report Card 17 Drasko Jovanovic, Barbara Grannis, and Marjorie Bardeen M. Stanley Livingston; 1905 - 1986 21 F.T. Cole Manuscripts, Notes, Lectures, and Colloquia Prepared or Presented from September 21 to October 20, 1986 23 Dates to Remember inside back cover Who's Who in the Upcoming Fixed-Target Physics Run? Mark W. Bodnarczuk Introduction The purpose of this article is to identify the 16 experiments and major test beam programs that will operate during the upcoming fixed-target run scheduled to begin in the middle of March 1987. -
Center for History of Physics Newsletter, Spring 2008
One Physics Ellipse, College Park, MD 20740-3843, CENTER FOR HISTORY OF PHYSICS NIELS BOHR LIBRARY & ARCHIVES Tel. 301-209-3165 Vol. XL, Number 1 Spring 2008 AAS Working Group Acts to Preserve Astronomical Heritage By Stephen McCluskey mong the physical sciences, astronomy has a long tradition A of constructing centers of teaching and research–in a word, observatories. The heritage of these centers survives in their physical structures and instruments; in the scientific data recorded in their observing logs, photographic plates, and instrumental records of various kinds; and more commonly in the published and unpublished records of astronomers and of the observatories at which they worked. These records have continuing value for both historical and scientific research. In January 2007 the American Astronomical Society (AAS) formed a working group to develop and disseminate procedures, criteria, and priorities for identifying, designating, and preserving structures, instruments, and records so that they will continue to be available for astronomical and historical research, for the teaching of astronomy, and for outreach to the general public. The scope of this charge is quite broad, encompassing astronomical structures ranging from archaeoastronomical sites to modern observatories; papers of individual astronomers, observatories and professional journals; observing records; and astronomical instruments themselves. Reflecting this wide scope, the members of the working group include historians of astronomy, practicing astronomers and observatory directors, and specialists Oak Ridge National Laboratory; Santa encounters tight security during in astronomical instruments, archives, and archaeology. a wartime visit to Oak Ridge. Many more images recently donated by the Digital Photo Archive, Department of Energy appear on page 13 and The first item on the working group’s agenda was to determine through out this newsletter. -
2007 Annual Report APS
American Physical Society APS 2007 Annual Report APS The AMERICAN PHYSICAL SOCIETY strives to: Be the leading voice for physics and an authoritative source of physics information for the advancement of physics and the benefit of humanity; Collaborate with national scientific societies for the advancement of science, science education, and the science community; Cooperate with international physics societies to promote physics, to support physicists worldwide, and to foster international collaboration; Have an active, engaged, and diverse membership, and support the activities of its units and members. Cover photos: Top: Complementary effect in flowing grains that spontaneously separate similar and well-mixed grains into two charged streams of demixed grains (Troy Shinbrot, Keirnan LaMarche and Ben Glass). Middle: Face-on view of a simulation of Weibel turbulence from intense laser-plasma interactions. (T. Haugbolle and C. Hededal, Niels Bohr Institute). Bottom: A scanning microscope image of platinum-lace nanoballs; liposomes aggregate, providing a foamlike template for a platinum sheet to grow (DOE and Sandia National Laboratories, Albuquerque, NM). Text paper is 50% sugar cane bagasse pulp, 50% recycled fiber, including 30% post consumer fiber, elemental chlorine free. Cover paper is 50% recycled, including 15% post consumer fiber, elemental chlorine free. Annual Report Design: Leanne Poteet/APS/2008 Charts: Krystal Ferguson/APS/2008 ast year, 2007, started out as a very good year for both the American Physical Society and American physics. APS’ journals and meetings showed solidly growing impact, sales, and attendance — with a good mixture Lof US and foreign contributions. In US research, especially rapid growth was seen in biophysics, optics, as- trophysics, fundamental quantum physics and several other areas. -
Cross Sections
Cross Sections DEPARTMENT OF PHYSICS AND ASTRONOMY UNIVERSITY OF ROCHESTER SPRING 2003 Second department alumnus to win the Nobel Prize © THE ROYAL SWEDISH ACADEMY OF SCIENCES Physics and Astronomy • SPRING 2003 Message from the Chair —Arie Bodek graduates, Laura Schmidt and Elizabeth tributed generously to the support of the Because of the great success of the Strychalski were awarded the Catherine department. By completing the form on sesquicentennial celebration, the Uni- Block and Janet Howell Prizes in 2002, the back cover of our newsletter, or by versity has initiated a new tradition and Jason Nordhaus and David Etlinger responding to our current drive for the of hosting a Meliora won Goldwater Scholarships. Mandel endowment, you can continue Weekend reunion every Over the years we have given high (or begin) that tradition of giving that year (see www.rochester. priority to the training of our under- will assure the future excellence of the edu/alumni/). The theme graduate and graduate students. This department. in fall 2003 is “Innova- attention has not gone unnoticed and Other ways to help our cause is to in- tion,” and we plan to has just been recognized in a nation- form any promising students about our highlight the most wide survey of U.S. graduate students summer undergraduate research program recent innovations and conducted in 2001. The Department of (REU), and to encourage students inter- discoveries in physics and astronomy. Physics and Astronomy at Rochester was ested in careers in physics or astronomy We encourage all our alumni and friends ranked second nationwide in overall to apply for graduate study at Rochester. -
ATLAS Installs Final Big Wheel
I n t e r n at I o n a l J o u r n a l o f H I g H - e n e r g y P H y s I c s CERN COURIERV o l u m e 47 n u m b e r 9 n o V e m b e r 2 0 07 ATLAS installs final big wheel DESY LHC FOCUS BROOKHAVEN FLASH makes pulses Preparing for the Ernest Courant looks at design energy p8 data onslaught p17 back 60 years p26 CCNovCover.indd 1 17/10/07 10:45:38 Project8 9/10/07 10:38 Page 1 NIM CAMAC VME NIMbox CC-USB VME-USB VDIS2 A programmable NIM Module with Controller with USB Controller with USB Diagnostic USB Interface Interface Interface Module for VME ! NPN20 - Progr.Logic Unit, 20 NIM I/O ! NPT20 - Progr. Logic Unit, 20 TTL I/O ! NDL8 - Leading Edge 8-fold Discriminator ! NAD4 - 100 MHz 4 channel F-ADC ! NDA8 - 100 MHz 8 PCI and VME channel DAC, e.g. adapters for CAMAC for detector are also available simulation ! New! Scaler, TDC, MLU, CQ16 MDGG8 ADC2530 and moreÖ 16 channel 12 bit CAMAC Progr. Delay and Gate 8 channel peak QDC, down to 25fC/count Generator, Scaler sensing 13 bit ADC USB cable, driver and software included Desk version (Nembox) for didactical experiments available Developed in collaboration with University of Heidelberg www.wiener-d.com Plein & Baus GmbH. Muellersbaum 20, 51399 Burscheid, Germany Phone: +49 (0)2174 6780, Fax: +49 (0)2174 678 55 CONTENTS Covering current developments in high- energy physics and related fields worldwide CERN Courier is distributed to member-state governments, institutes and laboratories affiliated with CERN, and to their personnel. -
How US Physicists First Came to Work at CERN
CERN-US COLLABORATION How US physicists first came to work at CERN After help from an eminent US figure, CERN was founded in the 1950s to provide a European stage for physics. Once the curtain was up, US physicists found the new laboratory increasingly attractive. In the first of two articles, Gordon Fraser traces the history of CERN-US collaboration from the post-war era to the advent of collider physics in the 1970s. In the late 1940s, Europe was major role in establishing the US struggling to emerge from the ruins Brookhaven National Laboratory. of the Second World War. The US The establishment of an analo had played a vital role in the con gous European laboratory was to flict, but had been less affected mat Rabi a natural and vital need. erially, and a shining vision of life However, on arrival in Florence he across the Atlantic was a beacon of was disturbed to find that there was hope for millions of Europeans liv no mention of this idea on the ing in austerity, if not misery. agenda. Two Europeans, Pierre i In a speech at Harvard on 5 June Auger (then UNESCO's director of 1947, US Secretary of State George exact and natural sciences) and C Marshall said that the US should Edoardo Amaldi, who was to be a help to "assist in the return of nor constant driving force, helped Rabi mal economic health in the world". Playing a key role in the post-Second World War through the intricacies of European North American "Marshall aid" was groundwork for what would become CERN was US physicist committee formalities. -
C-AD Particle Post
C-AD Particle Post Particle Post June 2007 "Life is a pure flame, and we live by an invisible sun within us" ~Thomas Browne To review previous issues A Note From Our Chairman The RHIC Retreat on July 16-17 will have machine availability as one of its foci. The run this year has a binary character to it. Either we have many stores back-to-back or we have stores separated by large time intervals due to equipment failures or operations inefficiencies. There is a lot to be discussed and then worked on. Despite the difficulties, we are close to the maximum estimated delivered luminosity for Run 7. It is clear that we have the potential to do even better. Stochastic cooling is a great success. We are now a factor of 5 away from our enhanced luminosity goal proposed with electron cooling of ions. C-AD proved once again that it was worthy of ISO 14001 and OHSAS 18001 recertification. Congratulations for getting through the audit with no identified deficiencies and a commendable practice. The DOE Inspector Generals Office will be at BNL in early June to look at cyber security. Remember the rules to have screen savers that timeout after 15-30 minutes of non-use, passwords, lock your offices when leaving and do NOT access adult material websites. June 14 is our Barbeque. Don’t forget to buy a ticket and be in the running for some great prizes and of course great food. Administration Despite the uncertain start to FY 2007, the Department’s financial health is excellent. -
N.Y. 11F73 INS Mcsnff IS Wum\I I EDITOR's FOREWORD
BNL 51377 MOOKHAVfN NATIONAL LAKMtATORY IRC* N.Y. 11f73 INS MCSNff IS WUm\i i EDITOR'S FOREWORD The planning and organization of this celebration was done by John Blewett, Ted Kycia, Vinnie LoDestro, Lyle Smith and Carl Thien, under the general direction of Ronald Rau and with the invaluable assistance of Kit D'Ambrosio. The logo which graces the cover of these symposium proceedings was de- signed by Per Dahl. The job of transcribing the tapes was done by Anna Kissel, and it was often a challenging one! I am to blame for the editing, which I hope has not distorted history too much. Joyce Ricciardelli has very ably produced the final manuscript and seen it through the complex process of publica- tion. All of us took pleasure and pride in celebrating the AGS and in putting this book together, and we hope you enjoy it. - iii - Preface On March 17, 1960, a beam was first introduced into the newly constructed Brookhaven Alternating Gradient Synchrotron. On March 26, a hundred turns of circulation were achieved, and on July 29 the beam WJS first accelerated to the design energy of 30 GeV. Thus, hewever one defines the exact start of life during the series of steps by which a new accelerator is made operational, the year 1960 marks the start-up of the AGS, and in 1980 we cele- brate the twentieth anniversary of that event. The AGS, together with the newly functioning PS at CERN, carried particle physics into a new world of higher energies and unanticipated discoveries. The AGS and the PS both embodied the new principle of strong focusing and demonstrated that, with its aid, a new era of particle accelerators haJ opened. -
Cyclotrons and Synchrotrons
Cyclotrons and Synchrotrons 15 Cyclotrons and Synchrotrons The term circular accelerator refers to any machine in which beams describe a closed orbit. All circular accelerators have a vertical magnetic field to bend particle trajectories and one or more gaps coupled to inductively isolated cavities to accelerate particles. Beam orbits are often not true circles; for instance, large synchrotrons are composed of alternating straight and circular sections. The main characteristic of resonant circular accelerators is synchronization between oscillating acceleration fields and the revolution frequency of particles. Particle recirculation is a major advantage of resonant circular accelerators over rf linacs. In a circular machine, particles pass through the same acceleration gap many times (102 to greater than 108). High kinetic energy can be achieved with relatively low gap voltage. One criterion to compare circular and linear accelerators for high-energy applications is the energy gain per length of the machine; the cost of many accelerator components is linearly proportional to the length of the beamline. Dividing the energy of a beam from a conventional synchrotron by the circumference of the machine gives effective gradients exceeding 50 MV/m. The gradient is considerably higher for accelerators with superconducting magnets. This figure of merit has not been approached in either conventional or collective linear accelerators. There are numerous types of resonant circular accelerators, some with specific advantages and some of mainly historic significance. Before beginning a detailed study, it is useful to review briefly existing classes of accelerators. In the following outline, a standard terminology is defined and the significance of each device is emphasized.