Electron clouds limit the performance of many major accelerators and storage rings. Significant quantities of electrons result when halo ions are lost to beam tubes, generating gas which can be ionized and ion-induced electrons that can multiply and accumulate, causing degradation or loss of the ion beam. In order to understand the physical mechanisms of ion-induced electron production, experiments studied the impact of 50 to 400 keV K{sup +} ions on stainless steel surfaces near grazing incidence, using the 500 kV Ion Source Test Stand (STS-500) at LLNL. The experimental electron yield scales with the electronic component (dE{sub e}/dx) of the stopping power and its angular dependence does not follow l/cos({theta}). A theoretical model is developed, using TRIM code to evaluate dE{sub e}/dx at several depths in the target, to estimate the electron yield, which is compared with the experimental results. The experiment extends the range of energy from previous works and the model reproduces the angular dependence and magnitude of the electron yield.

Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from Port Aransas, Texas on Mustang Island that includes local, state and national news along with extensive advertising.

Weekly student newspaper published in Hurst, Texas serving the Tarrant County College District that includes school news and information along with advertising.

Weekly newspaper from Tulia, Texas that includes local, state, and national news along with extensive advertising.

Tri-weekly student newspaper from Abilene Christian University in Abilene, Texas that includes local, state and campus news along with advertising.

Weekly newspaper from Lexington, Oklahoma that includes local, state, and national news along with advertising.

Semiweekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.

Weekly newspaper from Dell City, Texas that includes local, state, and national news along with advertising.

Biweekly newspaper from Harper, Texas that includes community news along with advertising.

Weekly newspaper from Wynnewood, Oklahoma that includes local, state, and national news along with advertising.

Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.

Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from Yoakum, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from Electra, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from Holliday, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from Wylie, Texas that includes local, state and national news along with advertising.

The Modular Caustic-Side Solvent Extraction (CSSX) Unit (MCU) and the Salt Waste Processing Facility (SWPF) will produce a Deactivated Salt Solution (DSS) that will go to the Saltstone Production Facility (SPF). Recent information indicates that solvent entrainment in the DSS is larger than expected. The main concern is with Isopar{reg_sign} L, the diluent in the solvent mixture, and its flammability in the saltstone vault. If it is assumed that all the Isopar{reg_sign} L is released instantaneously into the vault from the curing grout before each subsequent pour; the Isopar{reg_sign} L in the vault headspace is well mixed; and each pour displaces an equivalent volume of headspace, the allowable concentration of Isopar{reg_sign} L in the DSS sent to SPF has been calculated at approximately 4 ppm. The amount allowed would be higher, if the release from grout were significantly less. The Savannah River National Laboratory was tasked with determining the release of Isopar{reg_sign} L from saltstone prepared with a simulated DSS with Isopar{reg_sign} L concentrations ranging from 50 mg/L to 200 mg/L in the salt fraction and with test temperatures ranging from ambient to 95 C. The results from the curing of the saltstone showed that the Isopar{reg_sign} L release data …

Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.

Research on Previous BRAC Lawsuits ('91, '93, '95).

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.

Weekly newspaper from De Leon, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.

Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.