This paper presents design tables and graphs to aid engineers and designers in the selection of support spacing for vacuum beam lines and other vacuum pipes. This data applies to support spacing for thin wall pipes and tubes under an internal vacuum (or open to atmosphere) and subject to external atmospheric pressure. Data is generated from the equations for a simply supported thin walled pipe or tube of circular cross section. These tables and graphs indicate what the minimum spacing of supports is for a pipe or tube of a given radius and supply data for carbon steel, stainless steel, aluminum and copper materials. The wall thickness of the pipe and tube is limited to 1/10 of the pipe radium (T << R/10). A thickness of R/10 results in a decrease in the length values in the attached tables of 10%, whereas a thickness of R/100 results in a decrease in the length values in the attached tables of 1%. Snow loads, wind loads, equipment loads, etc. are not included in the tables and graphs. This data is applicable for vacuum pipes or tubes under its own static deed weight.

This document details the VME/CIPRICO Interface routines (VII). These routines where designed to allow programs written in PILS running on a MVME 101 under Valet-plus to control a CIPRICO tape controller. The routines fall into two general types. The low level routines, such as vti-make-pb, create the data structures used by the CIPRICO as well as manipulate the CIPRICO's control registers. The high level routines, such as vti-rewind, use the lower level routines to carry out complete functions on tape drives. Most tape operations are implemented except for ring buffer record routines. The creation of ring buffer record lists linked to parameter blocks is possible, but no high level routines are implemented to work with these lists. Memory utilization, parameter block creation and linking, polling and interrupts, status reporting, and the VTI routines are discussed. 2 refs.

HCPB is the acronym of an organic hydrogen getter compound used in weapon systems. When this material scavenges hydrogen by reacting with it, a number of compounds are formed, each of which is more volatile than HCPB. It is desirable to know the vapor pressure of these products in order to assess their migration potential within the weapon. In this study, individual compounds from a reacted HCPB mixture were isolated and their vapor pressures were measured. Three of the four fractions examined with a modified capacitance manometer were found to have vapor pressures under 1 mtorr; the fourth was measured at 92 +- 15 mtorr. An attempt was made to obtain boiling point data on the two liquid components of the getter mixture, but they decomposed before reaching their boiling points.

Upon completion of the fabrication process, the four central calorimeter cryostat flexible support assemblies were sent to Construction Technology Laboratories (CTL) in Skokie, IL, where the required tests were performed for Richmond Lox prior to the installation of the stanchions in the cryostat. These tests were to simulate the simultaneous axial and transverse loading experienced by the stanchions when the cryostat undergoes the cool down process.

A seal is needed for the cover of the Nitrogen Test Vessel in order to prevent leakage of the N{sub 2} gas. This seal is to be molded out of RTV 21. In this experiment, the Modulus of Elasticity of the RTV was sought after, and the displacements of the RTV due to various stresses were measured to see if they were large enough to provide a tight seal between the vessel and its cover.

The purpose of the OCH module spacers is to keep the given dimension of .224-inch between the 1.83-inch absorber plates. This distance is determined by two liquid argon gaps of .09-inch each and a readout board of .044-inch. The spacer should be made out of a material that would give a minimum thermal contraction movement. Also the dimension of the spacer will be determined dependent upon the load applied to the spacers and the strength of the material chosen. Considering both thermal contraction and yield strength, it is found that Invar-36 would be a suitable material from which to make the spacers for the OCh module, provided that SS304 washers are used in conjunction with the spacers. The spacers would be positioned about 1-inch from the corners of each of the copper plates, and would have a diameter of about 0.85453399-inch. The thickness of the Invar spacer would be 0.15394250-inch and that of the SS304 would be 0.07005750-inch. This combination of materials used for spacing purposes should result in zero displacement due to thermal contraction and no buckling due to overloading. The actual design of the spacer can be found in DWG.

This report describes the second part of the project that studied the science-oriented behaviors of students as they move through high school into college.

This engineering note contains the ASHE Code calculations for the CC Cryostat prepared by the manufacturer, Richmond-Lox Equipment Company. Most of these were taken from calculations initially prepared by Fermilab personne1and pub1ished in Eng. Note 68.

The superconducting Tevatron was added to Fermilab's 400 Gev Proton Accelerator, the main ring, in 1983. An antiproton source was added in 1985, and the system became a p-pbar, 1 Tev/I Tev, collider in 1987. A CoIIider Detector surrounding one of the points of the accelerator p-pbar beam crossings can measure virtually all the energy of the colliding interaction (Fig. I.) The measurement of all the energy is called hermetic calorimetry. Although there are other liquid argon calorimeters and other hermetic coIIider detectors, the D-Zero (named for the accelerator beam crossing location) liquid argon collider calorimeters will be the first of their kind (Fig. 2). The cryogenic aspects of the liquid argon calorimeter portion of the D-Zero detector are described here. The liquid argon serves as the particle detector ionizing media in a repetitive cell structure (Fig. 3) of argon, signal board, argon, and Uranium or copper absorber plate, with a superimposed electric field. Local signal board pads indicate location and the electric charge collected is proportional to the ionization and the ratio of the argon to plate absorption lengths. This arrangement provides a dense, intrinsically calibrated, drift-free calorimeter.

Weekly report of the Texas Agricultural Statistics Service on broiler chick numbers in Texas and compared with other states. It includes compiled statistics across six consecutive weeks, from the week ending December 27 to the week ending January 31, during 1985, 1986, and 1987 for broiler eggs set, chicks hatched, and chicks placed.

Weekly report of the Texas Agricultural Statistics Service on broiler chick numbers in Texas and compared with other states. It includes compiled statistics across six consecutive weeks, from the week ending September 26 to the week ending October 31, during 1986 and 1987 for broiler eggs set, chicks hatched, and chicks placed.

Weekly report of the Texas Agricultural Statistics Service on broiler chick numbers in Texas and compared with other states. It includes compiled statistics across six consecutive weeks, from the week ending January 24 to the week ending February 28, during 1986 and 1987 for broiler eggs set, chicks hatched, and chicks placed.

Compilation of monthly reports from departments in the city of San Antonio, Texas providing statistics, project updates, and other information about services and activities.

Reference repository concepts designs adopted by domestic and foreign waste disposal programs are reviewed. Designs fall into three basic categories: deep borehole from the surface; disposal in boreholes drilled from underground excavations; and disposal in horizontal tunnels or drifts. The repository concepts developed in Sweden, Switzerland, Finland, Canada, France, Japan, United Kingdom, Belgium, Italy, Holland, Denmark, West Germany and the United States are described. 140 refs., 315 figs., 19 tabs.