The most significant effort in the quarter was the completion of the conversion of the exit nozzle from adiabatic operation to air cooled operation. This conversion was implemented midway in the task 2 test effort, and the final two tests in task 2 were with the cooled nozzle. It performed as per design. The second significant result was the successful implementation of a computer controlled combustor wall cooling procedure. The hot side combustor liner temperature can now be maintained within a narrow range of less than 5OF at the nominal wall temperature of 2000F. This is an essential requirement for long term durability of the combustor wall. The first tests with the computer control system were implemented in June 1993. A third development in this period was the decision to replace the coal feeder that had been in use since coal fired operation began in late 1987. Since that time, this commercial device has been modified numerous times in order to achieve uniform coal feed. Uniform feed was achieved in 1991. However, the feeder operation was not sufficiently reliable for commercial use. The new feeder has the same design as the sorbent feeders that have been successfully used since 1987. …

This report discusses the following on the electromagnetic calorimeter for the solenoidal tracker at RHIC: conceptual design; the physics of electromagnetic calorimetry in STAR; trigger capability; integration into STAR; and cost, schedule, manpower, and funding.

The U.S. Department of Energy (DOE) has generated and disposed of large volumes of hazardous and radioactive waste as a result of 50 years of nuclear weapons production. DOE is now faced with the problem of remediating its more than 13,000 hazardous waste sites. To be effective for the good of the environment and public health, our nation`s hazardous waste policy must first address several questions: What is the level of risk at federal facilities? (Is remediation really necessary?) Can and should institutional controls be incorporated into the cleanup process? How effective are cleanup technologies? What cleanup standards should be used? What will be done with waste generated during remediation? How do we obtain appropriate stakeholder involvement? Once these questions are answered and a more reliable, predictable policy has been developed, the waste management and environmental restoration program may not be an unwanted drain on America`s pocketbook, and we may have a cleaner country as well.

The relevance of rf-sheath-plasma interactions to ICRF operation in TFTR has been studied. Screen-screen and screen-limiter rf sheaths have been identified and analyzed for the old and new Bay M geometries on TFIR, including sheath voltages driven by both feeders and the central antenna conductor. Calculations have been carried out to determine the effects of ICRF on edge transport (profile flattening by E {times} B convection), impurity influx ({delta}Z{sub eff}) and edge electron heating (FS glow phenomena) as a function of edge plasma parameters, rf power and antenna phasing. It was found that many of the experimentally observed ICRF-edge plasma interactions on TFIR are consistent with the predictions of rf sheath theory.

A serious consideration of laser power beaming for satellite applications appears to have grown out of a NASA mission analysis for transmitting power to lunar bases during the two week dark period. System analyses showed that laser power beaming to the moon in conjunction with efficient, large area solar cell collection panels, were an attractive alternative to other schemes such as battery storage and nuclear generators, largely because of the high space transportation costs. The primary difficulty with this scheme is the need for very high average power visible lasers. One system study indicated that lasers in excess of 10 MW at a wavelength of approximately 850 nm were required. Although such lasers systems have received much attention for military applications, their realization is still a long term goal.

In bombardments of {sup 248}Cm with {sup 22}Ne the authors discovered two new isotopes, {sup 265}106 and {sup 266}106, by establishing genetic links between {alpha} decays of the 106 nuclides and SF or {alpha} decays of the daughter (grand-daughter) nuclides. For {sup 266}106 they measured E{sub {alpha}}=8.62{+-}0.06 MeV followed by the SF decay of {sup 262}104 for which they measured a half-life value of 1.2{sup +1.0}{sub {minus}0.5} s. For {sup 265}106 they measured E{sub {alpha}}=8.82{+-}0.06 MeV. They estimated {alpha} half-lives of 10-30 s for {sup 266}106 and 2-30 s for {sup 265}106 with SF branches of {approximately}50% or less. The decay properties of {sup 266}106 indicate a large enhancement in the SF stability of this N=160 nuclide and confirm the existence of the predicted neutron-deformed shell N=162.

A TG-151 Thermogravimetric Experimental Station, which measures and records weight changes of a solid material over a wide dynamic temperature range at a wide range of pressures in controlled environments, was purchased from Cahn Instruments, Inc. The TG-151 permits temperature to be programmed to follow a precise temperature profile of ramp and/or isothermal segments while monitoring the changes in weight of solid samples exposed to a gaseous environment of specified composition at a preset pressure. Weight and temperature measurements are made at user-specified time intervals and total time (up to 48 hours). Data are stored on the disk of a dedicated computer. The data can be processed by a data analysis program or exported to spreadsheet programs. The pressure vessel is designed to operate in vacuum to 10{sup {minus}5} torr and over a wide range of pressures. At normal room temperature, the TG-151 can operate up to 100 atm and at 1273 K, it can operate up to 70 atm. The null balance has a sensitivity of 10 micrograms, capacity up to 100 grams, and a dynamic range of 10{sup 6}:1. Both reducing and oxidizing environments can be established in the reaction chamber. For our specific needs the instrument had …

We have determined the tropospheric radiative forcing Of O{sub 3} in the 175-735 nm (UV-Visible) wavelength range plus the 500-1650 cm{sup {minus}1} (Infrared) wavenumber range in accordance with a set of IPCC test cases provided to all interested modeling groups. The atmospheric test cases involved perturbed ozone scenarios in a McClatchey mid-latitude summer, clear sky, model atmosphere. A new short wave radiative transfer code has been developed to calculate the radiative forcing in the 175-735 nm wavelength range. The IR radiative forcing was calculated using a correlated k-distribution transmission model. The tropospheric radiative forcing values obtained for the IR spectral region and the UV-Visible spectral region lie in the middle of the range of preliminary values submitted from all of the models used in the IPCC test calculations.