The recently completed 25-inch hydrogen bubble chamber combines excellent picture quality with a fast operating cycle. The chamber has a unique optical system and is designed to take several pictures each Bevatron pulse, in conjunction with the Bevatron rapid beam ejection system. At present the chamber operates twice per Bevatron pulse. The general features of the chamber constructiosn are shown in Figs. 1 and 2. The chamber is ten inches deep at the narrowest point. The magnet is of conventional water cooled design and in present operation produces a vertical field of 18.5 kgauss. With suitable generators it has produced a field of 22.8 kgauss. The most important new features are discussed below.

Reversible photoinduced electron paramagnetic resonance (EPR) signals and photoconductivity were observed when a solution of tetracyancethylene (TCNE) in tetrahydrofuran (THF) was irradiated in the charge-transfer band of the complex formed between these two compounds. The eleven-line hyperfine structure of the EPR spectrum which was obtained demonstrated the presence of TCNE negative ion radical. The concentration of this radical was found to be directly proportional to the square root of the light intensity. Second order decay kinetics were followed when the light was shut off. Both the EPR signal and the photoconductivity rose initially as the square of the time. The latter portions of the growth curves could be fit to the latter portions of a hyperbolic tangential growth curve. From these data a reaction mechanism was proposed. The rate law dn/dt + kn{sup 2} = {alpha}L(1-e{sup -{beta}t}) = 0, where n = the concentration of radicals, t = the time, k, {alpha}, and {beta} are rate constants, and L = the light intensity, described both the photo-induced EPR and the photoconductivity within the limits of experimental accuracy.

This report details activities of the N-Reactor Department during the month of September 1964.

This report details activities of the N-Reactor Department during the month of May 1964.

The scheduled termination of PT IP-659-AC, presently being irradiated in F Reactor, will result in discharge of 105 columns of enriched uranium (0.947 w/o U-235) at less than 50 per cent of the goal exposure. The test block is currently scheduled to be replaced with natural uranium columns. Since F Reactor is on a semiblock discharge plan (alternate rows), subsequent operating plans would require that 64 of these replacement columns of natural uranium be likewise discharged during the scheduled outage in May of 1964 at less than 50 per cent of goal. It appears desirable to minimize the economic costs of the production test by an alternative discharge scheme (e.g., interim poison irradiation). The objective of this supplement is to soften the economic impact of low exposure fuel discharge scheduled by IP-659-AC and simultaneously to obtain a useful alternate product by irradiating nine columns of Li-Al and Bismuth in a ``striped`` charge.

The purpose of this test was to further evaluate the behavior of N Reactor fuel elements at conditions equivalent to or more severe than those expected at N Reactor. A. Date Charged: June 2, 1963: B. Fuel Elements: A total of fourteen 23.2 inch NAEl elements with an enrichment of 0.947 per cent were charged. C. Exposure: The fuel elements were charged a total of 5,661 hours. Of this period, the reactor operated 3,841 hours and the loop was at desired operating conditions 3, 292 hours or 86 per cent of reactor operating time. D. Date Discharged: January 24, 1964. E. Reason for Discharge: Goal exposure reached.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Waggoner Carr, regarding a legal question submitted for clarification: Whether a life insurance company is required to comply with the provisions of Article 4.02A (1) and (2), Texas Business Corporation Act, in addition to complying with the provisions of Article 3.05, Texas Insurance Code, in order to effect an amendment to its articles of incorporation.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Waggoner Carr, regarding a legal question submitted for clarification: Whether the proposed Ector County Juvenile detention facilities meet the statutory requirements of Articles 2338-1 and 5115 of Vernon’s Civil Statutes, as being separate and apart from adults, and as being suitably segregated, and related question.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Waggoner Carr, regarding a legal question submitted for clarification: Length of time an inmate must serve in the Texas department of Corrections before he is legally entitled to be considered for a parole if the inmate is serving a sentence of not less than two nor more than eight years.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Waggoner Carr, regarding a legal question submitted for clarification: Whether the Commissioners’ Court of Willacy County has the authority to compensate a special prosecutor for services rendered.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Waggoner Carr, regarding a legal question submitted for clarification; Compensation of a member of the House of Representatives who has a contractual agreement with the High Plains Underground Water Conservation District No. 1.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Waggoner Carr, regarding a legal question submitted for clarification: Whether Bayou Manor is exempt from ad valorem taxes as an institution of purely public charity.

This report discusses a comparative irradiation test of fuel elements of N-fuel uranium composition at Hanford.

The Purex L-Cell Package is used for organic stripping and concentrating aqueous plutonium solutions from the final Pu solvent extraction decontamination cycle. At the present time the package is used only during times when the gamma activity of the final product is too high to permit routing the solution to N Cell for final ion-exchange purification or when N Cell is inoperative. The package can be used only to concentrate and then route solutions to the PR Room for loadout into PR cans for storage prior to rework via TK-E6. In addition, operating data have shown that the present package has a low boil-off capacity which is insufficient for both current and forecasted plant production rates. At the present time, flowsheet modifications and processing rate reductions are necessary when the package is in operation. Entry into L Cell and contact maintenance are required to maintain the present package which was installed in 1956. Repairs to the package were made in 1962, and information obtained at that time indicates that extensive repairs to the present package will be required in the near future. The purpose of this report is to present the engineering study for the required modifications to the package …

This document details activities of the N-Reactor Department during the month of August 1964.

This report discusses a meeting scheduled with a Subcommittee of the Advisory Committee on Reactor Safeguards to review the future need for retention of government land on the Wahluke Slope. A number of questions were asked by the Washington AEC Division of Production as a basis for the discussions. This interim report provides answers to several of the questions.

This report provides the responses to questions concerning chemical processing capability under various reactor loadings and production programs.

Drifting a thick lithium-drifted counter (silicon and germanium) is a time-consuming operation that frequently results in a poor device, owing to inadequate knowledge of progress of the drifting operation. The drifting apparatus described here automatically controls the temperature of the detector that is being drifted to maintain the leakage current at a preselected value. While drifting proceeds, a continuous measurement is made of the distance of the lithium-drifted region from the opposite face of the wafer. When the drifted region reaches 30 mil or less from the back of the wafer a meter indicates the thickness of the undrifted region and, when this thickness falls below a preselected value, the temperature of the detector is automatically reduced to room temperature. The need for constant supervision of the drifting operation is thereby eliminated, and reliance on theoretical drift-rate calculations to predict the drift-through time is avoided. The technique has been applied to the manufacture of lithium-drifted silicon detectors with excellent results. The application of the technique to lithium-drifted germanium {gamma} detectors is also discussed briefly.

Formulas, computer program, and illustrations for a great circle path at ionospheric heights.

It has been suggested that metallic vacuum chambers might be suitable for pulsed magnets operating at audio frequencies, with pulse widths nominally 1/360 sec. In the present note calculations are given for a simple model of such a system, in order to estimate the effects of field attenuation and eddy current losses. The results of the calculation may be summarized briefly as follows, where the results apply to a cylindrical chamber of non-maeyletic stainless steel, 3.0 cm in inside diameter and 0.15 an wall thickness: (1) With steady-state harmonic excitation, the field in the interior Is reduced by a factor of {approximately} 1.03 at 2,000 cps compared to dc; (2) With transient operation, the exponential decay time is about 0.021 millisecond; (3) With square-wave excitation, at 200 gauss and 180 pps, the power dissipation in the stainless steel is about 24 watts/foot, or about a factor of 20 less if half-sine-wave pulses are used instead of square pulses. These results seem encouraging enough to warrant experimental investigation of this type of vacuum chamber for pulsed steering.