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Nuclear Science, IEEE Transactions on

Issue 3 • Date June 1971

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Displaying Results 1 - 25 of 355
  • [Front cover]

    Publication Year: 1971 , Page(s): c1
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    Freely Available from IEEE
  • IEEE Transactions on Nuclear Science

    Publication Year: 1971 , Page(s): c2
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    Freely Available from IEEE
  • Table of contents

    Publication Year: 1971 , Page(s): 1 - 28
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  • Conference Committees

    Publication Year: 1971 , Page(s): 2
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  • Comments on the Conference

    Publication Year: 1971 , Page(s): 3 - 5
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  • The Nucleus

    Publication Year: 1971 , Page(s): 6
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    Freely Available from IEEE
  • Dinner Address

    Publication Year: 1971 , Page(s): 7 - 12
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  • Relevance of Particle Accelerators to National Goals

    Publication Year: 1971 , Page(s): 29 - 35
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  • Fast neutrons and Π-1 mesons in cancer therapy

    Publication Year: 1971 , Page(s): 36 - 45
    Cited by:  Papers (1)
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    Radiotherapy is unique as a medical specialty in that it depends upon physical sources of energy deposition within tissues to bring about profound and complex biological changes for the purpose of eradicating cancerous growths. Thus, it has the broadest interface with both physical and biological sciences of any clinical discipline. It is for this reason that progress in radiotherapy is continually stimulated by advances in bothphysical and biological sciences. In recent years, increasing attention has been focused on high energy particle radiations as possible additions to the therapeutic armamentarium, in an effort to improve the results obtainable with x and y radiations. The purpose of this paper is to discuss how some accelerator produced radiations, fast neutrons and Π mesons, might be of potential value to radiotherapy. View full abstract»

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  • Federal Funding of Physics ... Prospects and Policy

    Publication Year: 1971 , Page(s): 46 - 54
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  • High Charge State Heavy Ion Sources

    Publication Year: 1971 , Page(s): 55 - 62
    Cited by:  Papers (4)
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    A review is given of existing sources of highly charged heavy ions. The performance of the sources, predominantly of the P.I.G. type, are summarized and compared. Some mechanisms for the production of high charge states are described. There is a brief description of new developments, particularly of devices using ion trapping. View full abstract»

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  • Transients in Large Tandem Accelerators

    Publication Year: 1971 , Page(s): 63 - 67
    Cited by:  Papers (1)
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    The stored energy in dc accelerators capable of reaching terminal potentials of 30 or 40 MV is more than an order of magnitude greater than in existing machines. To analyze the concentration of electrical fields under surge conditions the accelerator has been modeled by lumped constant networks. The analysis shows that in structures similar to the present ones the voltage distribution during a surge is very uneven and micro-discharges in the tube can initiate complete accelerator collapse. View full abstract»

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  • Performance Characteristics of the 30 MeV Three-Stage Tandem Facility at BNL

    Publication Year: 1971 , Page(s): 68 - 70
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    The 30 MeV 3-stage Van de Graaff facility at Brookhaven National Laboratory achieved the desired operating specifications on July 28, 1970 and has been in operation on various research programs since. The facility consists of two MP Tandem Van de Graaff accelerators arranged in line with a negative ion source installed in the terminal of the first accelerator. The two accelerators can either be used as separate Tandem accelerators or together in a 3-stage configuration. Proton energies as high as 30.5 MeV with currents as high as 4 microamperes have been obtained. View full abstract»

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  • The Pelletron Accelerator

    Publication Year: 1971 , Page(s): 71 - 75
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    A review is given of early development work at the University of Wisconsin on electrostatic accelerators insulated by high pressure gas. This work started in 1933 and led in 1940 to a 4.5MeV accelerator. Starting in 1946 development work was initiated along three lines: 1) Bakeable high strength metal to ceramic bonding, 2) Organic-free pumping, 3) Metal charge carrying devices. In 1951 construction was started at the University of Wisconsin on an accelerator utilizing results of these three development programs. In 1965 much development work was transferred to the National Electrostatics Corp. where the charging chain was developed. It consists of metal cylinders joined by links of solid insulating material. A 1MV column support unit was perfected which is used to construct column modules. A bakeable all metal and ceramic tube, free of organic vapors was developed. It consists of short sections bolted together with three sections per column module. A three-stage accelerator was built and was tested with a beam up to energies of 22MeV. A two-stage accelerator to provide 28MeV protons (14MV on terminal) is under construction. A two-stage accelerator to give 40MeV protons (20MV on terminal) has been designed. View full abstract»

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  • Production of Ultra-High Charge States in Heavy-Ion Collisions

    Publication Year: 1971 , Page(s): 76 - 78
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    Charge-state fractions have been determined for iodine, selenium and bromine ions traversing oxygen, argon, krypton, xenon, carbon-foil and gold-foil targets. Particular attention has been paid to high charge states, some containing as little as 10-6% of the primary beam intensity. The measurements indicate that a TU tandem accelerator is capable of delivering useful beams of heavy elements up to bromine (including 82Se and 48Ca) with energies suitable for the research of super-heavy elements. View full abstract»

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  • Performance of ANL 4-MV Dynamitron with Heavy-Ion Source

    Publication Year: 1971 , Page(s): 79 - 81
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    The performance of the ANL 4-MV Dynamitron accelerator using a Danfysik heavy-ion source is briefly described. Using CC14 support gas, 2 ¿A beams of 58Ni+ were obtained at 3.5 MeV and 6 ¿A beams at 2 MeV by optimizing source chemistry. View full abstract»

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  • The New 5 MeV Electrostatic Ion Accelerator at the Central Research Institute for Physics, Budapest, Hungary

    Publication Year: 1971 , Page(s): 82 - 84
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    The new 5 MeV electrostatic ion accelerator, projected, built, and tested at the Central Research Institute for Physics in Budapest, with some necessary aid from Hungarian industry /pressure vessel etc./ is described. The accelerator's main specifications are detailed and an account is given of the experiences with glass and porcelain accelerating tubes. By careful design, the intensity of radiation in the range of 4-5 MV has been reduced by 2-3 orders of magnitude. Without an ion beam there was only 3-5 times the intensity of the natural radiation background /i.e. less than 0.5 mR/h/ on the outer surface of the generator vessel when operated at 4-5 MV. The radiation level with the accelerated ion beam is accordingly also very low. During a 7-month period in 1970 the generator ran for 3,250 hours of measurements in nuclear physics. View full abstract»

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  • Heavy Ion Source with Pulsed Magnetic Field

    Publication Year: 1971 , Page(s): 85 - 86
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    A compact P.I.G. ion source with pulsed field and end extraction is described. The source produces multiply ionized N, C, Ne, A, Kr and Xe. Pulsed currents of C3+, N3+, Ne3+, A3+, Kr3+ , Xe6+ between a few tens of ¿A and a few hundreds of ¿A have been obtained. Small size and power consumption make it compatible with a Van de Graaff terminal where space and power are at a premium. View full abstract»

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  • The Preinjector of the BNL 200 MeV Linear Accelerator

    Publication Year: 1971 , Page(s): 87 - 89
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  • Pulsed-Beam Techniques Used with a Tandem Van De Graaff Accelerator

    Publication Year: 1971 , Page(s): 90 - 91
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    A compact pulsed-bean ion source injector was developed and installed on The University of Texas Tandem Accelerator. The injector consists of a direct extraction negative ion source coupled to a 100 keV Coskroft-Walton accelerator. Improvements in the arrangement and fabrication of the high voltage components of the injector are discussed. R. F. pulsing and klystron bunching of the ion beam is done before entering the tandem and a simple inexpensive method of rejecting the retrace component of the pulsed beam is presented. Pertinent pulsed beam characteristics measured under fast neutron time-of-flight experimental conditions are given. View full abstract»

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  • High Power Cockcroft-Walton Generator

    Publication Year: 1971 , Page(s): 92 - 93
    Cited by:  Papers (1)
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    To utilize the full current capability of the regular or symmetrical cascade generator, the conventional selenium rectifiers have to be replaced by a series-connection of silicon diodes which are rather sensitive to overvoltages and overcurrents. The problem of the application and protection of silicon diodes in high voltage generators had to be overcome in connection with the design of an air-insulated 770-kV dc power supply with a rated current of 180 mA dc for the ATOMIC ENERGY OF CANADA, LTD., Chalk River, Ontario and also for a 2 MV, 30 mA test facility. View full abstract»

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  • Design and Performance Characteristics of the Zero Gradient Synchrotron (ZGS) H- Ion Source and Related Systems

    Publication Year: 1971 , Page(s): 94 - 96
    Cited by:  Papers (2)
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    An expression for the maximum H- current obtainable from an H+ beam by charge exchange in hydrogen has served as a guide in the design and development of a source of H- ions for booster injection into the ZGS. Here it is used as a criterion in the evaluation of testbench results obtained with the present test source. Space and power limitations in the 750-keV terminal of the preinjector have led to the use of titanium sublimation pumping to handle large instantaneous gas loads. Power limitations and the need for high pumping conductance have led to the substitution of electrostatic deflection for magnetic deflection in the beam separator. View full abstract»

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  • A 3-MV Injector for the Superhilac

    Publication Year: 1971 , Page(s): 97 - 101
    Cited by:  Papers (1)
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  • An External Heavy Ion Source for the Berkeley 88-Inch Cyclotron

    Publication Year: 1971 , Page(s): 102 - 103
    Cited by:  Papers (3)
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    A heavy ion source of the PIG type has been installed on the axial injection line at the 88-Inch Cyclotron. It is now in the testing phase. Arc powers up to 4 kW have been run, and hydrogen and nitrogen beams have been injected and accelerated in the cyclotron. View full abstract»

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  • A Nominal One-Megavolt, Pulsed Power Generator

    Publication Year: 1971 , Page(s): 104 - 105
    Cited by:  Papers (3)
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    A pulsed voltage generator, called Frizz, has been designed and constructed at Sandia Laboratories and is now being used as a voltage source for breakdown studies of various materials. Frizz generates a nominal 100 ns pulse of variable risetime from 5 to 50 ns across a vacuum chamber in which dielectric test samples are placed. View full abstract»

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IEEE Transactions on Nuclear Science focuses on all aspects of the theory and applications of nuclear science and engineering, including instrumentation for the detection and measurement of ionizing radiation; particle accelerators and their controls; nuclear medicine and its application; effects of radiation on materials, components, and systems; reactor instrumentation and controls; and measurement of radiation in space.

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