The authors have measured the asymmetry in the cross section for the reaction {gamma}p {yields} {pi}{sup +}n between the two stages of polarization of the initial proton normal to the plane of scattering. The initial laboratory photon energies, k, were 5 GeV and 16 GeV, and the regions of momentum transfer, t, covered were 0.14 {le} {radical}-t {le} 1.01 GeV/c and 0.14 {le} {radical}-t {le} 0.78 GeV/c respectively. A butanol polarized target was used with the SLAC 20 GeV/c magnetic spectrometer. The data show a sizeable asymmetry at both 5 GeV and 16 GeV. The 16 GeV data peak at {radical}-t {approx} 0.30 GeV/c with an asymmetry of about -0.70, and the 5 GeV data pak at {radical}-t {approx} 0.80 GeV/c with an asymmetry of about -0.70. The direction of our normal to the scattering plane is along (photon in) x (pion out).

The production of high energy (multi-GeV) proton beams by an electron ring accelerator is considered. Both the final energy and intensity of the proton beam depend on the choice of parameters for the electron ring. Possible sets of parameters, consistent with all the known requirements of ring stability, and which optimize the energy and (or) the intensity of the proton beam, are presented.

This report presents calculations to reduce the quantity of tritium released to the environment from the Purex Plant.

The purpose of this study is to experimentally determine the thermal hydraulic characteristics of the One-Inch Overbore fuel geometry under both single and two-phase flow conditions. Results of these experiments demonstrate the relation between pressure drop and flow at various tube power levels and will be utilized to establish process tube operating limits and trip margins.

Lattice physics subsystems of the JOSHUA system are described. Information is included on data management, geometry modules, nuclear data modules, and integral transport modules. The JOSHUA system is a set of computer codes for the design of heterogeneous reactors.

Metallurgical examinations and evaluations were performed on a group of four target tubes from Atomic Power Development Associates (APDA) Rig 10. This group included two 2/sup 1///sub 4/ Cr--1 Mo ferritic steel tubes, one Type 304 SS, and one Incoloy 800 tube. These tubes had been exposed to small leaks of water in 600/sup 0/F sodium. Metallographic data indicate that the material loss (wastage) was primarily due to impact (or erosion) of liquid particles. No evidence of corrosion was found in the wasted areas of any target tubes. Minor corrosion was observed on the outside diameter of the austenitic stainless-steel tubes only in areas away from impact; no corrosion was detected on the outside diameter of the ferritic steel tubes. Hardness measurements and microstructural analyses revealed that the maximum temperature may have reached 1600/sup 0/F in the wasted areas. This localized temperature increase appeared to enhance the wastage process for all target tubes regardless of composition. Surface grain elongation and plastic deformation lines were observed in wasted areas, as well as in other areas. However, their cause(s) cannot be ascertained with respect to deformation due to water-jet impact, or deformation due to fabrication and handling, or both. Based on the …

Information on the JOSHUA system for lattice physics measurements is presented concerning leakage modules, edit modules, control modules, lattice depletion modules, lattice Monte Carlo modules.

The authors propose to measure the polarization parameter in pp, {pi}{sup -}p, and {pi}{sup +}p scattering at incident momenta of 50, 100, and 150 GeV/c over the range 0.15 {le} -t {le} 1.5 (GeV/c){sup 2}. The apparatus consists of a polarized proton target, two spectrometer arms which determine the angles and momenta of both outgoing particles, and an on-line computer. The detectors are designed to operate at incident beam rates of up to 10{sup 8} beam particles/pulse. They anticipate an error in the polarization parameter P of .005 {le} {Delta}P {le} .01 over the range .15 {le} -t {le} .8 (GeV/c){sup 2} in 100 shifts of data taking and background studies.

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A simple magnet-less missiong-mass experiment is proposed to investigate the mass-spectrum of non-strange baryons of isospins 1/2 and 3/2 in the mass-range from 4 to 10GeV with a resolution of {+-}25 MeV or better. The spacing between baryons expected from the empirical interval rule {Delta}M{sup 2} = 1 BeV{sup 2} is 125 and 50 MeV for masses of 4 and 10 GeV respectively; if the rule holds, one expects 10{sup 2}-4{sup 2} = 84 resonances in this range. They plan to use the reaction p + p - p + MM and to detect the recoil protons in the region of the Jacobian peak. The protons of momenta from 400 to 850 MeV/c are selected by means of time-of-flight, range, and pulse height and are recorded in a pulse height analyzer. Since no magnets, wire planes, computers or any other major facilities are needed, the experiment can be done as soon as the beam, either full extracted (Option 1) or secondary diffracted (Option 2) or interla (Option 3) is available.

The authors propose to study {approx} 40,000 events of the type beam particle + proton {yields} M + beam particle where M is a fairly low mass (2-5 GeV) state which is peripherally produced and slow in the lab. The decay products of M would be studied in detail as a function of M at two different beam momenta. The choice of beam particle and the two beam momenta would depend on what was technically most feasible, but at least the beam momenta should be greater than 100 GeV/c. A hydrogen bubble changer, pulsing several times per machine cycle, would be triggered on a fast forward particle near the beam momentum. The invariant mass M would be calculated for each event by momentum analysis of this particle. The experiment requires a beam with a momentum resolution {Delta}p/p of .002 or better and an emittance of .1 mm - mrad.

The reactions {pi}+ p {yields} {pi}+ {hor_ellipsis} and {pi}+ p {yields} K+ {hor_ellipsis} will be studied over a wide range of the Feynman variables X, Q and S in order to test the conjectured scaling law for hadron collisions and study the form of the yield distributions. Particular attention will be paid to the vicinity of X = 0. The experiment will be carried out with a simple one-magnet spectrometer which takes full advantage of the kinematics and has wide acceptance and the capability of high precision.

The authors propose to study Kp and {bar K}p interactions in the energy regions immediately above those now accessible by exposing the NAL large liquid hydrogen bubble chamber to a neutral K{sub L}{sup o} beam.

We propose to investigate the asymptotic properties of the K{sub 0}p and {bar K}{sub 0}p cross sections from 40 GeV to 200 GeV by the method of neutral kaon regeneration in liquid hydrogen. Both the difference in total cross section and the regeneration phase will be determined to a precision of better than 10% up to approximately 160 GeV, and with decreasing precision to 200 GeV. The apparatus we propose to use is of a standard reliable type. The neutral beam is derived from a target intercepting 10{sup 11} protons at 400 GeV in the main accelerator ring. In this way, an experiment of major importance can be done very early in the NAL program which cannot otherwise be attempted until the advent of Area III.

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We propose an experimental study at the new 500 GeV accelerator of the differential cross-section for particle production in hadron-hadron collisions. The projectile, and the observed single particle, will range over all combinations of positive and negative {pi}, K and p, with momenta extending up to the highest available. Enough of the secondary particle momentum range will be covered to permit us to determine by integration the multiplicity of the produced particle. Single particles will be detected in a simple spectrometer consisting of wire chambers and a small bending magnet. The configuration of the spectrometer components will be variable so that the overall spectrometer length can be kept proportional to the secondary momentum. The momentum resolution {male}P/P = {+-}0.8% and the invariant phase space acceptance P{sup 2}d{Omega}dP/E = 1.3x10{sup -3} (GeV/c){sup 2} will then be the same at all momenta. Particle identification will be by means of threshold Cherenkov counters, with 10{sup 4}: 1 rejection up to at least 250 GeV/c. Our experimental arrangement is thought to be simple and yet powerful, and we propose its use initially with incident protons and a nuclear target for a beam survey and quark search. Subsequent measurements will be carried out with a …

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We propose a wire spark chamber experiment to measure the pion electromagnetic radius accurate to {+-}0.03f by measuring the scattering cross section for 50-80 GeV pions from electrons in a liquid hydrogen target. The data will distinguish between the {rho} dominance prediction of 0.64f and the ''proton-like'' radius to 0.81f.

We propose a relatively simple first stage experiment with muons in the 50-150 GeV range. The experiment is designed to optimize conditions for testing scale invariance while providing some information about the final state, as a test of various theories of high energy interactions. The proposed use of an iron spectrometer and of a high Z (>1) target with a low intensity ({approx}10{sup 6}/sec) muon beam should greatly reduce the cost and complexity of the experiment and especially ease the construction of the beam. It may even be possible to make an adequate muon beam for this purpose from the planned 3.5 mrad high intensity pion beam. A higher intensity muon beam can be used to extend the range in q{sup 2}. Information gained in this first experiment could greatly assist the planning of a more sophisticated experiment proposed for the high intensity {mu} beam.

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