27 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Magnetic Fields"  
Results: 1 - 24 next
open access

BETA-RAY SPECTROMETER WITH REDUCED SPHERICAL ABERRATION

Description: Modern {beta}-ray spectrometers are based upon the concept, first introduced by Svartholm and Siegbahn in 1946, of focusing in both the radial and vertical directions. The theory of axially symmetric devices has been carefully studied by a large number of workers, culminating in the analysis, in 1956, of Lee-Whiting and Taylor. These last authors calculate aberrations through the sixth order and show that by appropriate choice of the magnetic field a spectrometer can be designed with a relative… more
Date: February 4, 1963
Creator: Sessler, Andrew M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A DISCUSSION AND BIBLIOGRAPHY OF CURRENT LITERATURE CONCERNING VAN ALLEN BELTS FOR USE IN SNAP SPACE ENVIRONMENTAL STUDIES

Description: Discussion of theories on particle motion in electric and magnetic fields precedes examination of theories on the source of the inner and outer Van Allen belts. Theories for the inner belt propose solar cosmic ray injection and galactic cosmic ray injection as the source of the protons. Neutron albedo is particularly examined but seems to be unaccountable for the proton belt. Neutron albedo and injection from the sun are also considered as possible sources of the electrons in the outer belt. Fl… more
Date: February 15, 1963
Creator: Kistler, V. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electronuclear Division Annual Progress Report for Period Ending December 31, 1962

Description: Heavy-ion reactions in the low-Z region were investigated with 27-Mev nitrogen ions from the 73-inch Cyclotron and with 30-Mev oxygen ions from the Tandem Van de Graaff. Experiments included studies of angular distributions and excitation functions for transfer reactions, compound-nucleus reactions, effects of angular momentum on the density of nuclear states, and so-called Ericson fluctuations in the compound nucleus Si/sup 28/. Nuclear reactions induced with 22-Mev protons in the 86-Inch Cycl… more
Date: May 24, 1963
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparison of Lumped and Distributed Inflector Magnets

Description: Desirable characteristics of pulsed magnets used as ejectors or inflectors for large accelerators can be obtained by loading the magnet with distributed capacitance or by using a capacitor in shunt with the load. Comparable field build-up tlmes are available with either arrangement. The lumped magnet system offers greater simplicity. (D.C.W.)
Date: March 18, 1963
Creator: Forsyth, E. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

TRAJECTORIES FOR A RECTANGULAR MAGNET WITH UNIFORM FIELD

Description: To aid in orientation of a hodoscope system using a rectangular magnet with a uniform field, projections of the trajectory of particles in the horizontal and ventical planes are calculated approximately. Fringing field effects are represented by adding a correction to the length of the magnet and assuming the field to be uniform over the total effective length. The assumption that the source lies in the median plane of the magnet is also used in treating the vertical motion. (D.C.W.)
Date: February 1, 1963
Creator: Sternheimer, R.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Studies of the Rapid Beam Ejector at the Cosmotron

Description: Extraction of the external beam of the cosmotron with maximum efficiency and minimum duration for measurements of the magnetic moment of the lambda hyperon requires addition of a rapid beam ejector (RBE). Early experiments with the RBE give lower ejection efficiency than the standard ejection system. Reconstruction of the RBE with lengthening of the rise time of the system gives improved values. Computer studies that involve solving the equation of motion for the radial betatron oscillation wit… more
Date: January 16, 1963
Creator: Barton, M. Q.; Kernan, W.; Novey, T.; Warshaw, S. & Wattenberg, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

THE CONVERSION OF ELECTROMAGNETIC ENERGY INTO SHOCK PULSES

Description: The repulsion-coil technique for energy conversion offers a powerful, new tool in the field of acculeration testing. Using this technique, a prototype magnetic shock device was developed that uses electrical energy stored in a capacitor bank to produce high-g, mechanical acceleration pulses. A disc projectile is vacuum-held against the core of an electromagnet coil, and a crystal accelerometer is attached to the projectile to monitor the pulse. The capacitor bank is charged to a specific voltag… more
Date: May 1, 1963
Creator: Meagher, T.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

CURRENT-CARRYING CAPACITY AND TRANSITION STATE OF SUPERCONDUCTING SOLENOIDS

Description: A solenoid wound with high-field superconducting wire displays maximum currents and fields (H) that are less than the critical field of the wire itself in an equal field (H). Montgomery's and Chandraseknar and Hulm's models for these maximum properties indicate, respectively, a unique coil quenching characteristic for geometrically similar solenoids and one unique characteristic for all solenoids with identical wire type and turn distance. Experiments with Pb coils did not verify Mont… more
Date: January 1, 1963
Creator: Gauster, W F & Coffey, D L
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Dynamic Void Fraction Measurement System

Description: Various methods and techniques of measuring void fraction in boiling heat transfer media are discussed. Details of 17 void-fraction measurement systems are abstracted. A dynamic void-fraction measurement system is described, capable of continuously measuring void fraction at any position along a 12-ft test section. Void fraction (the ratio of vapor volume to total volume of a 2- phase mixture) is measured in boiling organic coolant contained by a test section of 5/8-in.-OD nickel tube with 0.04… more
Date: May 15, 1963
Creator: Kendron, J. H.; Stoner, E. E. & Taylor, G. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

EXPERIMENTAL STUDIES ON THE CURRENT CARRYING CAPACITY OF NbZr WIRES UNDER CONDITIONS OF FIXED AND SWEPT MAGNETIC FIELD

Description: The current-carrying capacity of Nb- Zr wire was studied under conditions of swept magnetic field and fixed wire current and of fixed magnetic field and swept wire current. The effects of wire movement, thermal environment, copper coating of the wire, and rate of sweep of wire current or magnetic field were determined for these test conditions. (auth)
Date: January 1, 1963
Creator: Laverick, C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ULTRASONIC ATTENUATION IN LEAD

Description: The absorption of longitudinal ultrasonic waves was studied as a function of transverse magnetic field in pure single crystals of lead at 1.2 deg K. The results were found to be generally consistent with the Fermi surface of lead suggested by Gold. In particular a detailed study of the magneto-acoustic oscillations, as a function of sample orientation and field direction, allowed the determination of some of the dimensions of the hole surface in the second Brillouin zone and revealed a number o… more
Date: January 1, 1963
Creator: Mackintosh, A.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Design and Performance of Levitation Melting Coils

Description: A study was undertaken to evaluate the parameters involved in the performance of levitation coils with particular emphasis on the heating effect. The field strength along the axes of various coils was measured using a small search g proportionial to the field strength. The search coil was calibrated with a straight solenoid coil in which the field strength was calculated. By considering each turn of a levitation coil as a short solenoid whose length was the tubing diameter, the field strength c… more
Date: March 1, 1963
Creator: Hulsey, W. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NUCLEAR AEROSPACE SAFETY PROBLEMS

Description: Safety problems that have arisen in the conquest of space and are of a nuclear origin are discussed. Space radiation such as cosmic radiation, geomagnetically trapped corpuscular radiation, and solar flare radiation and radiations inherent in nuclear auxilliary power systems are considered. Problems created by the use of nuclear propulsion systems are emphasized. Launch pad problems and core disposal are discussed (M.C.G.)
Date: April 22, 1963
Creator: King, L.D.P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Design Studies of Proton Linear Accelerators

Description: The use of digital computational techniques in the design of a 200-Mev standing-wave proton linear accelerator for use as an injector for a 12.5 Bev FFAG accelerator is described. A field computational program that permitted evaluation (optimization) of the r-f structure cost for a given accelerator design is described, and typical results are shown. A particle dynamics program is also described (D.C.W.)
Date: September 9, 1963
Creator: Young, D E; Christian, R S; Curtis, C D; Edwards, T W; Kriegler, F J; Mills, F E et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Strong-Focusing Cyclotron With Separated Orbits

Description: The concept and basic theory of a new fixed-frequency, fixed-field, high- energy accelerator embodying the principle of strong-focusing and capable of accelerating protons to energies in the Bev region is described. The magnetic field is designed with the turns of the equilibrium orbit' separated axially as well as radially, as in a spiral-helix, so as to avoid the resonances associated with alternatinggradient systems. The focusing properties can be changed discontinuously at chosen points alo… more
Date: January 1, 1963
Creator: Russell, F. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Physical Limitations on the Measurement of Transient Fields in Air and in Dissipative Media Using Electric and Magnetic Probes

Description: The properties of electric and magnetic probes for the measurement of transient electromagnetic fields in air and in dissipative media are discussed briefly, It is shown that the effective height of an electrically small loop is independent of the ambient medium. This is also virtually true for a thin electrically short dipole (or monopole). If the open-circuit voltage of a magnetic probe can be measured accurately, it is possible (in principle) to reconstruct the time history of the incident m… more
Date: November 1, 1963
Creator: Harrison, C. W., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High Energy Elastic Scattering of $Pi$$Sup 1$, P,/Anti P/ and K$Sup 1$ by Protons (and Regge Pole Predictions)

Description: The counter hodoscope experiments at incident particle momenta of 7-20 Bev/c are summarized. The data are presented, together with the associated Regge pole analyses. The effective radii, opacities, and total cross sections obtained for the interactions are included. A magnetic spectrometer setup used for low four-momentum transfer data is also described, and optical theorem predictions for pi /sup -/-p and p-p are given. (D.C.W.)
Date: June 27, 1963
Creator: Lindenbaum, S. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental Studies on the Current Carrying Capacity of NbZr Wires Under Conditions of Fixed and Swept Magnetic Field

Description: Abstract: The current-carrying capacity of Nb- Zr wire has been studied under conditions of swept magnetic field and fixed wire current and of fixed magnetic field and swept wire current. The effects of wire movement, thermal environment, copper coating of the wire, and rate of sweep of wire current or magnetic field have been determined for these conditions of test.
Date: January 1, 1963
Creator: Laverick, Charles.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen