| Development of Unique, Leading-Edge, Advanced Medical Research and Development Initiatives in the Western United States and Pacific Rim: Proton Beam Therapy Innovations |
JUL 2007 |
24 pages |
| Authors:
Thomas J. Contreras; HENRY M JACKSON FOUNDATION FOR THE ADVANCEMENT OF MILITARY MEDICINE ROCKVILLE MD
|
 | Research and development of novel evaluative methods for proton beam radiotherapy is the primary research presented in this annual report. The long-term objective of this research was to develop a methodology for integrating as well as knowledge discovery of a DICOM-Radiation Therapy electronic patient record (ePR) system to manage patients with most types of Proton Beam Therapy (PT) treatment cases across multiple sites with DOD patients. As a first step, ... |
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| Proton Dose Assessment to the Human Eye Using Monte Carlo N-Particle Transport Code (MCNPX) |
AUG 2006 |
82 pages |
| Authors:
David B. Oertli; TEXAS A AND M UNIV COLLEGE STATION
|
| The objective of this project was to develop a simple MCNPX model of the human eye to approximate dose delivered from proton therapy. The calculated dose included that due to proton interactions and secondary interactions, which included multiple coulombic energy scattering, elastic and inelastic scattering, and non-elastic nuclear reactions (i.e., the production of secondary particles). After benchmarking MCNPX with a known proton simulation, the proton therapy beam used at Laboratori ... |
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| Radiation Testing of the Configurable Fault Tolerant Processor (CFTP) for Space-Based Applications |
DEC 2005 |
165 pages |
| Authors:
James C. Coudeyras; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| Field Programmable Gate Arrays (FPGAs) provide a reconfigurable asset in the design of space computing. Hardware configurations are stored in FPGA memory elements, which are susceptible to Single Event Upsets (SEUs). What is the best way to detect and mitigate SEUs and correct them before they become functional errors? The Configurable Fault Tolerant Processor (CFTP) consists of a controller FPGA (X1) controlling an experiment FPGA (X2), which can be used ... |
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| Design and Test of a Beam Line for Extraction of Slow Antiprotons from a Multi-Ring Electrode Ion Trap |
24 JUN 2002 |
10 pages |
| Authors:
K. Y. Franzen; H. Higaki; T. Ichioka; M. Hori; Z. Wang; TOKYO UNIV (JAPAN) INST OF PHYSICS
|
| A new monoenergetic slow antiproton beam facility has recently been installed at the CERN Antiproton Decelerator (AD). The system is designed to deliver pulsed or continuous antiproton beams in the 10-1000 eV energy region which is suitable for various interesting atomic and molecular spectroscopic and collision studies. The antiprotons obtained from the AD are slowed down to around 100 keV by passing the Radio Frequency Quadrupole Decelerator (RFQD) and then ... |
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| Installation and Operation of Particle Transport Simulation Programs to Model the Detection and Measurement of Space Radiation by Space-Borne Sensors |
03 JAN 2002 |
98 pages |
| Authors:
Stanley Woolf; ARCON CORP WALTHAM MA
|
| This is a report of technical progress made during 1 Aug 00 to 31 Jul 01 in the areas of: (1) research and evaluation of particle transport simulation programs for modeling the detection and measurement of space radiation by space- borne sensors; (2) construction of realistic flight sensor computer models; (3) performance of particle transport calculation; (4) analysis of transport simulation results, including single particle tracking; (5) addition of new ... |
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| Assessment of Compact Low Neutron Fusion Reactor Concepts |
16 FEB 2000 |
36 pages |
| Authors:
H. V. Wong; M. T. Kotschenreuther; B. N. Breizman; J. W. Van Dam; Richard D. Hazeltine; TEXAS UNIV AT AUSTIN INST FOR FUSION STUDIES
|
| A brief summary of our results is as follows. We find that, in the proton-boron colliding beam fusion reactor, the power which must be supplied to maintain an optimal colliding beam configuration is estimated to be as least 5.1 times greater than the fusion power. This implies that effective power conversion efficiencies to electrical power in excess of 84% will be required. Furthermore, if the transverse collisional spread of the ... |
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| 11TH International Conference on High Power Particle Beams. Proceedings, Volume 1 |
JUL 96 |
694 pages |
| Authors:
Karel Jungwirth; Jiri Ullshmied; CZECHOSLOVAK ACADEMY OF SCIENCES PRAGUE INST OF PLASMA PHYSICS
|
| Volume 1 of 2 containing conference proceedings from the 11th International Conference on High Power Particle Beams (BEAMS '96) held in Prague, Czech Republic between 10-14 June 1996. |
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| Compact Lightweight Power PEMFC Operating from a Unique Hydrogen Generating System. |
NOV 1995 |
50 pages |
| Authors:
Robert Theriault; GINER INC WALTHAM MA
|
| The goal of this program was to investigate the feasibility, for the military, of a 120-watt, 20,000- watt-power source weighing near ten pounds. An air breathing proton exchange membrane fuel cell (PEMFC) utilizing hydrogen from Lithium Borohydride (LiBH4) could theoretically meet this specification. Giner, Inc. has established that a hydrogen generator, utilizing LiBH4, provides a hydrogen current flux of 150 Amps/sq ft with about 60% long-term utilization. Additionally, Giner, Inc. ... |
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| Current Neutralization in Ballistic Transport of Light Ion Beams |
06 OCT 92 |
48 pages |
| Authors:
Richard F. Hubbard; Steven P. Slinker; Martin Lampe; Glenn Joyce; Paul Ottinger; NAVAL RESEARCH LAB WASHINGTON DC
|
| Intense light ion beams arc being considered as drivers to ignite fusion targets in the Laboratory Micro-fusion Facility (LMF). Ballistic transport of these beams from the diode to the target is possible only if the beam current is almost completely neutralized by plasma currents. This paper summarizes related work on relativistic electron beam and heavy ion beam propagation and describes a simple simulation model (DYNAPROP) which has been modified to ... |
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| BEAMS 92. Proceedings of the International Conference on High-Power Particle Beams (9th) Held in Washington, DC on May 25 - 29, 1992 |
29 MAY 92 |
713 pages |
| Authors:
David Mosher; Gerald Cooperstein; MARYLAND UNIV COLLEGE PARK
|
| The purpose of Beams 92 was the exchange of new ideas and results associated with the science and applications of high-power particle beams in the following areas: (1) Physics and technology of high-power particle beams; (2) New developments in pulsed-power technology and high-power accelerators; (3) High-power particle beam experiments and diagnostics; (4) Particle-beam interactions with matters; (5) Physics of pulsed-power-driven discharges; (6) Applications to coherent radiation generation; and (7) Technical ... |
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| Beams 92. Proceedings of the International Conference on High-Power Particle Beams (9th) held in Washington, DC on May 25 - 29, 1992. Volume 2 |
29 MAY 92 |
713 pages |
| Authors:
David Mosher; Gerald Cooperstein; MARYLAND UNIV COLLEGE PARK
|
| The purpose of Beams 92 was the exchange of new ideas and results associated with the science and applications of high-power particle beams in the following areas: (1) Physics and technology of high-power particle beams; (2) New developments in pulsed-power technology and high-power accelerators; (3) High-power particle beam experiments and diagnostics; (4) Particle-beam interactions with matter; (5) Physics of pulsed-power-driven discharges; (6) Applications to coherent radiation generation; and (7) Technical ... |
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| Beams 92. Proceedings of the International Conference on High-Power Particle Beams (9th) held in Washington, DC on May 25 - 29, 1992. Volume 3 |
29 MAY 92 |
680 pages |
| Authors:
David Mosher; Gerald Cooperstein; MARYLAND UNIV COLLEGE PARK
|
| The purpose of Beams 92 was the exchange of new ideas and results associated with the science and applications of high-power particle beams in the following areas: (1) Physics and technology of high-power particle beams; (2) New developments in pulsed-power technology and high-power accelerators; (3) High-power particle beam experiments and diagnostics; (4) Particle-beam interactions with matter; (5) Physics of pulsed-power-driven discharges; (6) Applications to coherent radiation generation; and (7) Technical ... |
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| Surface Production of Ions |
26 MAY 92 |
102 pages |
| Authors:
Milos Seidl; STEVENS INST OF TECH HOBOKEN NJ DEPT OF PHYSICS AND ENGINEERING PHYSICS
|
| Surface production of negative hydrogen ions by electron transfer from solid surfaces to backscattered hydrogen atoms was investigated. The low- energy hydrogen atoms were produced by thermal dissociation or electron impact dissociation of hydrogen gas and by deceleration of a proton beam. A highly stable cesium oxide converter surface, giving the highest observed yield for surface production of H-ions, was developed. A microwave discharge producing an intense flux of superthermal ... |
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| Influence of Stereochemistry on Radiation-Induced Structural Changes in PMMA |
31 MAY 90 |
|
| Authors:
J. A. Moore; Jin O. Choi; RENSSELAER POLYTECHNIC INST TROY NY DEPT OF CHEMISTRY
|
 | We have been studying the effects of radiation on poly(methylmethacrylate), PMMA, which has been used as a resist in computer chip microlithography. In contrast to predictions based on solution photochemistry of related compounds we have found by careful spectroscopic study of the irradiation polymer leads to four different kinds of double bonds. These ester cleavage reactions do not necessarily lead to rupture of the backbone, a necessary condition for efficient ... |
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| Development and Use of Data Analysis Procedures for the CRRES Payloads AFGL-701-2/Dosimeter and AFGL-701-4/Fluxmeter and Application of the Data Analysis Results to Improve the Static and Dynamic Models of the Earth's Radiation Belts |
12 OCT 89 |
|
| Authors:
Bronislaw K. Dichter; Frederick A. Hanser; PANAMETRICS INC WALTHAM MA
|
| This report summarizes the calibration work done on the High Energy Electron Fluxmeter, an instrument to be flown aboard the Combined Release and Radiation Satellite (CRRES). The instrument was calibrated using electron beams with energies between 0.75 to 10.8 MeV and proton beams with energies between 25 and 144 MeV. Keywords: Fluxmeter; Electron; Calibration; Protons. (SDW) |
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| Proton Magnetometer Survey of Site 3MS105, Eaker Air Force Base, Arkansas |
06 JUN 89 |
|
| Authors:
Linda Wadleigh; Kevin W. Thompson; TETRA TECH INC SAN BERNANDINO CA
|
| A proton magnetometer survey was conducted over portions of Site 3MS105, a 75-acre multicomponent prehistoric village site in northeast Arkansas. The magnetometer survey was used as a nondestructive means of locating subsurface archaeological features. Archaeologists conducted an intensive recordation of the site partially concurrent with the magnetometer survey. Surface cultural material included arrow points, ceramics, human skeletal material, faunal remains, shell, and historic glass and metal. Anticipated subsurface cultural materials ... |
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| Demonstrate the Feasibility of a Detection Method to Separate Neutral Particles from Charged Particles in the MeV/Nucleon Energy Range |
OCT 88 |
|
| Authors:
Bronislaw K. Dichter; Frederick A. Hanser; PANAMETRICS INC WALTHAM MASS
|
| A breadboard model of a spacecraft borne instrument to measure the neutral atomic fluxes with energies between 1 to 10 Mev/nucleon has been designed and constructed. Differentiation between incident charged and neutral particles will be done by measuring the production rate of convoy electrons by the particles. Calculations indicate that convoy electron production rate is much larger for neutral hydrogen than it is for protons. Incident particles strike a thin ... |
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| Intense Ion Beam from a Magnetically Insulated Diode with an Active Anode Source. Abstract Only |
AUG 86 |
|
| Authors:
Mario Ueda; CORNELL UNIV ITHACA NY
|
| A magnetically insulated diode using an active anode pl asma ion source was developed and thoroughly characterized. In this extraction-geometry ion diode, an anode plasma of annular shape and 30 cm diameter is formed independently of the injector voltage pulse. The anode plasma is produced by inductive voltage breakdown of a radially expanding gas cloud supplied by a fast puff valve. This diode was driven by the low voltage (100 ... |
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| Study in Spurious Sensitivity of Electronics in Space |
01 AUG 85 |
|
| Authors:
David M. Yeager; ITT AEROSPACE/OPTICAL DIV FORT WAYNE IND
|
| The results of an experimental investigation into the interaction of protons, E = 318 MeV and 132 MeV, with selected multiplier phototubes and silicon photodiodes are presented. The devices were chosen because of their spaceborne applications and previous gamma ray, electron, and lower energy proton measurements. The energies are representative of those expected of particle beam weapons. A discussion of the operation of each device and its expected response to ... |
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| Analysis and Interpretation of the Shock-Like Electrostatic Noise Observed during the AMPTE (Active Magnetospheric Particle Tracer Explorers) Solar Wind Lithium Releases |
MAY 85 |
|
| Authors:
D. A. Gurnett; T. Z. Ma; R. R. Anderson; O. H. Bauer; G. Haerendel; IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY
|
| During the AMPTE (Active Magnetospheric Particle Tracer Explorers) solar wind lithium release on September 11, and again on September 20, 1984, an intense burst of electrostatic noise was observed near the upstream edge of the ion cloud. Comparisons with measurements by the IMP-6 and ISEE-1 spacecraft show that the spectrum and overall features of this noise are very similar to electrostatic noise observed at the earth's bow shock. A stability ... |
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| Low Power, Radiation Hard GaAs RAM |
MAR 85 |
|
| Authors:
R. Vahrenkamp; K. Elliot; R. Zucca; E. Walton; ROCKWELL INTERNATIONAL THOUSAND OAKS CA MICROELECTRONICS RESEARCH AND DEVELOPMENT CENTER
|
| The scope of this program is to demonstrate a 1K GaAs static RAM having very low power dissipation and short access time to meet the requirements of the DARPA Advanced On-Board Signal Processer (AOSP). Device isolation and backgating studies were performed, subthreshold uniformity measurements made, and a new RAM design using transmission gates finalized. Proton damage has proven to be an effective technique for maximizing device isolation for ultra- low ... |
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| On Proton Bombardment of Silicon Semiconductors. Ionization vs Displacement Disablements |
01 FEB 85 |
|
| Authors:
George M. Safonov; Ernest A. Martinelli; George C. Messenger; R AND D ASSOCIATES MARINA DEL REY CA
|
| The bombardment of thick silicon crystalline targets by monodirectional and monoenergetic beams of 25 to 250 MeV protons is considered. By use of a proton fluence model that accounts for straggling effects, total ionization dose and silicon atom displacement density particle energy. For assumed values of total dose (1 Mrad (Si) ) and displacement( 10 to the 14th power 1-Mev-equivalent-neutrons/sq cm) levels that would disable typical semiconductors, the times required ... |
|
| Interim Scientific Report for the Induction Linac Program |
30 SEP 84 |
|
| Authors:
John A. Nation; CORNELL UNIV ITHACA NY LAB OF PLASMA STUDIES
|
| The induction Linac program has been carried out principally using a dedicated Blumlein facility as the pulse power source. As previously described the source feeds a two to one step up autotransformer, which when coupled with a direct electrostatic feed to the anode from the Blumlein, gives a diode voltage of three times the line output voltage. The nominal operating impedance of the system is 21 Ohms. This system has ... |
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| Intense Proton Beam Plasma Interactions |
NOV 83 |
|
| Authors:
R. Kraft; B. R. Kusse; CORNELL UNIV ITHACA NY LAB OF PLASMA STUDIES
|
| A study has been initiated to investigate interactions between an intense proton beam and a background hydrogen plasma. The magnetic and electric neutralization of the ion beam by the plasma as well as collective interactions between the beam and the plasma are objects of this study. The plasma is produced by a conical theta-pinch gun and injected into a 2 kG solenoidal guide field. Plasma densities in the neighborhood of ... |
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| Numerical Simulation of High Energy Light Ion Beam Flow through a Foilless Diode |
21 JUL 1983 |
|
| Authors:
Robert J. Barker; Charles W. Roberson; Frederick Mako; NAVAL RESEARCH LAB WASHINGTON DC
|
| A numerical and theoretical study is reported which treats the effects upon a 500 ke V, hollow electron beam in a foilless diode along the centerline of which has been injected a beam of 30 Me V protons. Specifically, the results of simulations of three, separate equilibrium diode states (for electron-only, 1 kA of protons, and 5 kA of protons) are reported. The computational findings are compared to rough, theoretical ... |
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| Rocket-Borne Positive and Neutral Beam Experimental Plan |
JAN 1983 |
|
| Authors:
J. W. Carpenter; C. H. Humphrey; VISIDYNE INC BURLINGTON MA
|
| In this report the design of a rocket-borne charge ejection payload consisting of proton and neutral hydrogen beams is presented. The experimental plan calls for beams to be emitted up, down, and perpendicular to the geomagnetic field to be intercepted by throw-away detectors (TADS). This experimental plan is designed to be very cost effective, while extending the present upper limit of heavy charged beams to higher levels and revealing significant ... |
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| Electron and Proton Spectrometry in the AFGL Auroral E Program. I. Experiment Overview and Preliminary Auroral Electron Data |
09 APR 1982 |
|
| Authors:
W. J. McMahon; L. Heroux; R. H. Salter; AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
|
| The design of spectrometers to determine electron and proton spectra over energy ranges between 2 eV and 60 keV, and their application in a dual rocket experiment to measure these particle fluxes in a continuous aurora, are discussed briefly. Details of the overall experiment, including relevant flight parameters, are given, and preliminary results of electron measurements are presented. (Author) |
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| AFGL Rocket - and Shuttle-Borne Particle Beam Experimental Program |
FEB 1981 |
|
| Authors:
L. Katz; C. H. Humphrey; J. W. Carpenter; VISIDYNE INC BURLINGTON MA
|
| The technical objectives and experimental plans for a series of sounding rocket and shuttle flights for the study of particle beam operations in space are presented. A program for a systematic set of experiments to study the physical principles controlling beam emission and propagation including the interaction of the beams with the vehicle and the propagation medium is detailed. (Author) |
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| Ion-Beam Excited Gas Laser. |
14 OCT 1980 |
|
| Authors:
A. Wahab Ali; Jeffry Golden; J. Gary Eden; Redge A. Mahaffey; John A. Pasour; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A high-power gas laser pumped by an intense, pulsed, space charge-and-current-neutralized ion beam is described. A high-pressure gas in the laser cavity is ionized by an ion beam. Atomic processes occur which result in a population inversion for the excited states of the gas. Coherent radiation is then emitted by the excited gas atoms in the inverted state. The light is amplified as it traverses the gas. Multiple traversal can ... |
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| Analysis of Proton Transport Experiments. |
05 SEP 1980 |
|
| Authors:
F. C. Young; S. J. Stephanakis; G. Cooperstein; D. Mosher; F. L. Sandel; NAVAL RESEARCH LAB WASHINGTON DC
|
| As a part of the NRL light ion beam research program, experiments on the transport of intense pulsed proton beams have been carried out. The NRL GAMBLE II pulser was used to generate proton beams and the measurement of prompt-gamma rays was the primary diagnostic for proton transport. The first sequence of shots was made using a large-diameter (4.5 cm) transport channel with a 2.5-cm diameter aperture. The transport of ... |
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| MHD Plasma Channel Response to Propagating Ion Beams. |
24 JUN 1980 |
|
| Authors:
D. G. Colombant; D. Mosher; Shyke A. Goldstein; NAVAL RESEARCH LAB WASHINGTON DC
|
| Hydrodynamic response of plasma channels induced by intense propagating ion beams is examined using both analytical estimates and a one-dimensional radial numerical model. It is found that mega-ampere, 3-5 MeV proton beams can be propagated in deuterium background over several meters. |
|
| The NRL CHMAIR Code: A Disturbed Sea Level Air Chemistry Code |
15 NOV 1979 |
41 pages |
| Authors:
R. F. Fernsler; A. W. Ali; J. R. Greig; I. M. Vitkovitsky; NAVAL RESEARCH LAB WASHINGTON DC
|
| An Air Chemistry Code which describes the evolution and the relaxation of disturbed air, at the sea level, is described. Pertinent reactions and their coefficients are presented. The Code can be utilized with various forms of energy inputs, i.e., high power lasers, microwave radiation, electric discharge and high energy electron and proton beams. (Author) |
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| Material Response to 500 keV Proton Beams at Intensities Below 1 GW/cm2. |
25 JUL 1979 |
|
| Authors:
T. R. Tucker; D. Mosher; D. Hinshelwood; NAVAL RESEARCH LAB WASHINGTON DC
|
| Stress-wave response of several materials to 500 keV, 1 kA/sq cm. proton pulses was monitored by shadowgraphy and interferometric methods. Results indicated the presence of both direct absorption and interaction plasma effects. Incident beam power densities of about 1 GW/sq cm. are necessary for plasma effects to dominate the interaction. (Author) |
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| Low Resistivity-High Minority Carrier Lifetime Single Crystal Silicon Investigation. |
APR 1979 |
|
| Authors:
Paul M. Stella ; R. W. Opjorden; SPECTROLAB INC SYLMAR CALIF
|
| The objective of this program is to improve the performance of N+/P silicon solar cells by improving the minority carrier lifetime of moderate to low resistivity silicon material. The behavior of cells fabricated from improved material will be demonstrated by measuring electrical output without irradiation and after 1 Mev electrons and 10 MeV proton irradiation. This report discusses the first fifteen months' efforts toward developing and evaluating a new solar ... |
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| Intense Ion Beam Producing Reflex Triode. |
21 NOV 1978 |
|
| Authors:
Christos A. Kapetanakos; Jeffry Golden; DEPARTMENT OF THE NAVY WASHINGTON D C
|
| A reflex triode for use in producing ultra-high-current (> 100,000 A), ultra-highpower (> 10 to the 11th power W) ion beams includes an improved anode and an improved cathode and has a low inductance design. A cylindical anode stalk supporting the anode is positioned inside of and closely spaced from a cylindrical cathode shank which supports the cathode. Magnetic insulation allows for a close spacing between the anode stalk and ... |
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| Applications of the Radioisotope Wear Measurement Technique. |
JUN 1978 |
|
| Authors:
R. Birkmire; A. Niiler; ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Erosive wear has been measured from gun steel surfaces by detecting the loss of the radioisotope 56 Co which has been introduced into the surface layers. The 56 Co activity is produced by means of the 56 Fe(p,n) 56 Co reaction when the steel is bombarded by a beam of protons. A detailed calibration curve, relating the amount of 56 Co activity to the amount of surface material worn off, ... |
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| Intense Proton Beam Pumped Ar-N2 Laser. |
APR 1978 |
|
| Authors:
J. G. Eden; J. Golden; R. A. Mahaffey; J. A. Pasour; A. W. Ali; NAVAL RESEARCH LAB WASHINGTON D C
|
| Gas laser action using a charge and current neutralized proton beam as a pump source has been demonstrated. Stimulated emission at 357.7 and 380.5 nm, corresponding to the v' = o transfers to v'' = 1 and v' = o transfers to v'' = 2 transitions of the N2(C transfers to B) band, has been observed in Ar/5%N6 gas mixtures. In comparison with electron beams, protons appear to be more ... |
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| Stochastic Acceleration of Solar Flare Protons. |
24 MAR 1978 |
|
| Authors:
D. D. Barbosa; STANFORD UNIV CALIF INST FOR PLASMA RESEARCH
|
| Consider the acceleration of solar flare protons by cyclotron damping of intense Alfven wave turbulence in a magnetic trap. The energy diffusion coefficient D sub EE is computed for a near-isotropic distribution of super-Alfvenic protons and a steady-state solution for the particle spectrum is found for both transit-time and diffusive losses out of the ends of the trap. The acceleration time to a characteristic energy of about 20 Mev/nucl can ... |
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| Intense Proton Beam Current Measurement via Prompt Gamma Rays from Nuclear Reactions. |
MAR 1978 |
|
| Authors:
Jeffery Golden; Redge A. Mahaffey; John A. Pasour; FranK C. Young; Christos A. Kapetanakos; NAVAL RESEARCH LAB WASHINGTON D C
|
| The current of an intense, pulsed proton beam is experimentally determined by monitoring prompt gamma rays from nuclear reactions induced in a suitable target. Relevant data is given on the reactions employed including 7Li(p, gamma)8Be, 19F(p, alpha gamma)16O, and 12C(p, gamma)13N so that absolute currents can be determined. This method avoids the complication of target blow-off and the need for attenuating screens when applied to high current density beams. (Author) ... |
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| Intense Focussed Ion Beams and Their Interaction with Matter. |
NOV 1977 |
|
| Authors:
D. Mosher; G. Cooperstein; S. J. Stephanakis; Shyke A. Goldstein; D. G. Colombant; NAVAL RESEARCH LAB WASHINGTON D C
|
| Recent experiments and theory dealing with the production, focussing, and interaction with matter of ion beams extracted from pinched-beam diodes is reviewed. Present experiments indicate that in excess of 300 kA of .8 MeV protons can be extracted from flat anode structures while deuterons can be focussed to about 70 kAsq.cm over 2 sq.cm target areas in a focussing geometry. (Author) |
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| Reflex Tetrode with Unidirectional Ion Flow. |
NOV 1977 |
|
| Authors:
J. A. Pasour; R. A. Mahaffey; Jeffry Golden; Christos A. Kapetanakos; NAVAL RESEARCH LAB WASHINGTON D C
|
| Experimental results are reported which show that the backward directed (and unusable) ion current in a reflex triode can be almost completely suppressed by adding a second anode, made of aluminized mylar, 0.5 cm from the existing polyethylene anode. Proton generation efficiencies in excess of 50% have been obtained. (Author) |
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| Theory of He2(+) + O2 Charge Exchange Laser. |
JUL 1977 |
|
| Authors:
A. W. Ali; NAVAL RESEARCH LAB WASHINGTON D C
|
| The kinetics of O2(+) first-negative band laser due to near resonance charge exchange between He2(+) and O2 are presented. It can be excited in the afterglow of a discharge in a high pressure He and O2 mixture (He>>O2). Gain calculation, however, is presented for discharges due to high energy proton beams advocating their use for high pressure gas lasers. In addition, a comment is made on the disappearance of 3914 ... |
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| Generation of Fraction of a Terawatt Proton Pulses with Coaxial Reflex Triodes. |
DEC 1976 |
21 pages |
| Authors:
J. Golden; C. A. Kapetanakos; S. J. Marsh; S. J. Stephanakis; NAVAL RESEARCH LAB WASHINGTON D C
|
| Results are reported on the generation of MeV, pulsed ion beams at a peak power level in excess of 2 X 10 to the 11th power watts that have an angular divergence of about 3 degrees -4 degrees. Such beams can be used in the formation of field reversing proton rings. |
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| The Interaction of Slow Particles with Matter and Plasma Diagnostics, |
17 DEC 1974 |
|
| Authors:
Yu. V. Gott; Yu. N. Yavlinskii; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
|
| The question of the interactions of slow particles (of energy less than 50 KeV) with solids is considered in this book. The authors describe the current theoretical and experimental status of the investigations of the energy loss and range of particles in matter, proton charge exchange, and proton scattering in traversing a layer of matter. Experimental methods which are applicable to this type of research are described. Methods of obtaining ... |
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| Formation of N2(+)(B doublet Sigma(+)(u)) and N2(C triplet Pi(u)) in Collisions of H(+) and H with N2, |
25 APR 1974 |
|
| Authors:
John H. Birely; AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
|
| The 200 to 500-nm radiation excited by collisions of beams of 1 to 25-keV H(+), D(+), H, and D with N2 has been studied under thin target conditions with a viewing geometry chosen to minimize polarization effects. Excitation and ionization are discussed. Cross sections are calculated. Experimental and data reduction aspects are considered. |
|
| A Multiwire Proportional Chamber System for Monitoring the Position and Profile of a Charged Particle Beam, |
26 APR 1973 |
|
| Authors:
C. K. Hargrove; J. P. Legault; L. Bird; H. Mes; R. Sancton; NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF PHYSICS
|
| A multiwire proportional chamber system with a simple capacitive readout has been built to monitor the beam profile and position of charged particle beams. The system was successfully used in a 1 cm diameter proton beam of intensity 10 to the 5th power--10 to the 11th power protons/s. Using a collimated 90Sr source it was found that the position of a beam could be determined to better than 1.5 mm. ... |
|
| Stimulated Amplification of VLF and ULF Waves in the Magnetosphere by Localized Injections of Plasma Clouds and Particle Beams. |
DEC 1972 |
|
| Authors:
Harold B. Liemohn; G. K. Parks; WASHINGTON UNIV SEATTLE
|
| The cyclotron resonance interaction between ULF-VLF waves and trapped particles may be strongly enhanced in the magnetosphere by the injection of either cold plasma or energetic particle beams. A variety of natural conditions and injections are investigated numerically using the linear theory. Both satellite and rocket injection of cold plasma provide significant enhancements of amplification. Conventional hot electron beams may also amplify narrow frequency bands, if the beam geometry can ... |
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| Interactions of Energetic Neon with Emulsion Nuclei. |
12 OCT 1972 |
|
| Authors:
Peter J. McNulty; Robert C. Filz; AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS
|
| Measurements of interactions of 280 MeV/nucleon neon nuclei from the Princeton Particle Accelerator with nuclei in emulsions are reported. It is found that the dominant mechanism for nucleus-nucleus interactions for incident neon energies as low as 100 MeV/nucleon is the production of charged and/or neutral pions. (Author) |
|
| Initial Formation of Beams of Hydrogen Ions, |
JUL 1972 |
|
| Authors:
V. V. Vecheslavov; V. A. Gorbunov; DEFENCE RESEARCH INFORMATION CENTRE ORPINGTON (ENGLAND)
|
| Calculated and experimental data are given for systems involving initial formation of a beam of ions of hydrogen for the specific case of an incompressible beam with a current of 24 ma and with an extraction voltage of 40 Kv. An account is given of the Pearce optifal system, of the defocussing action of the extractor hole and of the free dispersion of the beam behind the extractor. The caluclated ... |
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| Report of Cyclotron Operation, 1 July-30 December 1970. |
MAY 1971 |
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| Authors:
NAVAL RESEARCH LAB WASHINGTON D C
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| Progress in the experimental program using the NRL Sector-Focusing Cyclotron during the period 1 July - 31 December 1970, is described. Various aspects of the developmental program associated with experimental equipment as well as development of the cyclotron are reported. The allocation of beam time to various experimental programs is included in the last section. (Author) |
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