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, John L. Hill, regarding a legal question submitted for clarification: Whether a peace officer's destruction of an arrest record pursuant to an official expungement policy is an offense under section 37.10, Penal Code.

The spectra, angular distribution, and polarization functions of synchrotron radiation are tabulated in parametric form. Numerous graphs of the functions are included, and these can be used for rapid estimation of photon flux as a function of the various parameters. The extended synchrotron radiation source is described, and the exact, but unintegrable, equations are derived. Properties of this source depend upon at least nine parameters. An approximation of the source accurate enough for estimating flux in optical instruments is developed. Power and power density in the radiation beam are described and convenient approximations are developed. Simple optical transformations are used to illustrate some of the important properties of the extended source.

During the past contract period, this research has been concerned with three principal tasks, namely: (1) Fusion-product studies. The primary objective of this work is to study potential effects (e.g. instabilities, changes in heating profile and wall loadings, etc.) caused by high-energy fusion products. A second objective is to establish the operating conditions and measurements required for use of D-/sup 3/He in early experiments such as TFTR to simulate D-T burns. (2) Mirror system studies. The objective of this work is to provide specialized support for the mirror research and development effort at the Lawrence Livermore Laboratory. Three topics are under study: charge-exchange losses during neutral beam injection; the dynamics of plasma build-up during start-up; new approaches to mirror systems such as the ''twin-beam'' mirror. (3) Exploratory studies. Several new studies have been initiated during this period. These include: extension of the mirror neutral-beam injection studies to toroidal geometry and preliminary studies of reversed field configurations. Further details about each of these areas are contained in subsequent sections.

Quantitative estimations are made for the atmospheric dispersion of gases, heat, and noise due to geothermal energy sources in Southern California's Imperial Valley. In particular, gas concentration per unit source strength, change in mixing ratio, relative humidity, temperature, and the ratio of heat flux to solar constant are calculated. The possibility of atmospheric refraction of source noise is also considered.

A time-limited signal which, when passed through a linear system, maximizes the total output energy is considered. Previous work has shown that the solution is given by the eigenfunction associated with the maximum eigenvalue in a Hilbert-Schmidt integral equation. Analytical results are available for the case where the transfer function is a low-pass filter. This work is extended by obtaining a numerical solution to the integral equation which allows results for reasonably general transfer functions.

It has been demonstrated that electron microscope images obtained at about 3A resolution for Pr/sub 7/O/sub 12/ are in agreement with calculated images based upon known structures. This establishes the efficacy of crystal structure image interpretation in structural terms, including the defect structure and mechanism of phase reactions, for these types of related phases whose structures are as yet beyond conventional means to determine. Further work on the epsilon (Pr/sub 10/O/sub 18/) phase is reported both utilizing electron optical methods and single crystal X-ray techniques. The ternary ceramic system HfO/sub 2/.xEr/sub 2/O/sub 3/ is being examined using electron optical techniques and ordering not hitherto reported is being observed. An interactive crystal structure image calculation system is being developed which will permit the immediate comparison of enhanced images synthesized from trial structures (including defects) and displayed in juxtaposition on a graphics unit. 22 fig. (auth)

Data are summarized on the radioactivity and content of Be and heavy metals in environmental samples collected during 1975. No Laboratory effluent resulted in an estimated radiation dose to the nearest resident exceeding 1 mrem. Assessment of the radiation doses to an individual from the environmental activities listed in this report demonstrates that the dose contribution from Laboratory operations in 1975 was very small compared with the approximately 100-mrem/year dose locally received from natural sources. (CH)