Report discussing the status of the five main thermonuclear research groups at University of California Radiation Laboratory. The Mirror Machine program is given a more detailed description.

The following report demonstrates experimental verification of a method described in a previous paper--that involves measuring the dispersive microwave propagation coefficients simultaneously at several frequencies and comparing measured values with the values calculated for various distribution functions--and describes the procedure used to determine the distribution function in a sample laboratory plasma experiment.

The following report examines the trapping of charged particles, fast electrons especially, within the geomagnetic field.

The following report is a bibliography containing reports, books and journals on the production of high temperatures (2000-3000 F). The literature provided only covers to the end of 1957.

Preface: This report presents the results of condition surveys of taxiway 5 and the east N-S runway, McCoy Air Force Base, Orlando, Florida, made in accordance with addendum 3 to Instructions and Outline, "Condition Surveys for Existing Pavements."

"Preliminary results are given for pumping neutral hydrogen gas in 1-second pulses by the gettering action of an evaporated coating of molybdenum. One second gas in-puts are observed at equivalent pumping speeds > 10-4 liters/second at 1 x 10-(-8) mm Hg in a 70-liter volume system. Base pressures <1 x 10-(-10) mm Hg are achieved by gettering with the static evaporated coating and pumping with a 4 in. oil diffusion pump simultaneously. Criteria for choice of gettering metal and a brief outline of pumping requirements for controlled fusion devices called Pyrotrons are included."

A report pertaining to the thermal-conductivity and electrical-resistivity measurements of uranium encapsulated in zircaloy-2 and surrounded with NaK as a heat-transfer material which is not in agreement with results obtained from unclad uranium.

From Abstract: "This report up-dates certain sections of HASL-42, "Environmental Contamination from Weapon Tests". In particular, the levels of Strontium-90 in fallout, milk, tap water, air, and soil are included for data available up to November 1, 1958."

Abstract: During March 1958, representatives of the health and Safety Laboratory, New York Operations Office, visited Columbia University to make stray radiation measurement at the Van de Graff accelerator. A radiation survey was performed at the Van de Graaff electrostatic generator at Columbia University. The survey results do not indicate a particular need for additional shielding at this time. It is recommended that the analyzer area of the beam room should not be occupied during beam operations and the present interlock system should be modified by the installation of a photocell interlock as shown on the included plan.

Report issued by the Oak Ridge National Laboratory discussing work completed by the Applied Nuclear Physics Division during 1956. Summaries of experiments conducted and project developments are presented. This report includes tables, illustrations, and photographs.

Report that describes work performed by by the Hanford Laboratories Operation on the Plutonium Recycle Program during the Fiscal Year.

Report regarding a nuclear reactor designed to operate in arctic conditions. This report includes a design of such a reactor and potential hazards.

Report documenting research and developments made by the Health Physics Division of the Oak Ridge National Laboratory.

Progress report discussing projects and work completed by the University of Michigan Department of Chemistry 1957-1958.

Report that offers updated information from the Materials Testing Reactor (MTR) and Engineering Test Reactor (ETR) "experiment safety circuit manual by providing ETR power reduction curves and other information on ETR not yet available at the time the manual was issued, September 15, 1957" (p. 1).

Existing experimental information about the nucleon-anitnucleon interaction is reviewed, and a description is given of a theoretical model, based on the Yukawa theory, which seems able to explain the experimental results.

Zircaloy-2 tubing was successfully joined to austenetic and ferritic stainless steel tubing by fusion bonding. Tungsten inert gas welding was employed to join a flange to a pressure tube. This work was performed to help determine the design of pressure tubes of a pressure tube reactor.