The mutual coherence of simultaneously injection-locked laser diode arrays (open access)

The mutual coherence of simultaneously injection-locked laser diode arrays

The modulus of the mutual coherence function, {vert bar}g{sub 12}({tau}){vert bar}, has been measured for two physically separated laser diode arrays that were simultaneously injection locked to the same master laser. The measured value {vert bar}g{sub 12}({tau}){vert bar} = 0.96 {plus minus} 0.06, is close to ideal. 2 figs.
Date: April 22, 1990
Creator: Brewer, L. R.
System: The UNT Digital Library
Physics goals and signatures at the SSC (open access)

Physics goals and signatures at the SSC

The physics goals of the SSC are presented and the capabilities of the SSC to achieve them are assessed. New gauge bosons, electroweak symmetry breaking, supersymmetry, and quark substructure are the primary targets for particle physics research and the SSC is the most effective means to find them. 2 refs., 4 figs.
Date: May 22, 1990
Creator: Cahn, R.N.
System: The UNT Digital Library
New, heavy transuranium isotopes (open access)

New, heavy transuranium isotopes

In this report, we offer our most recent results concerning the decay properties for five new isotopes of Md, No, Lr, and for {sup 258m}Md. In additions to these successful experiments, we have also conducted searches for {sup 263}(105), {sup 264}(105), {sup 272}(109), and superheavy elements from bombardments of {sup 254}Es with heavy ions. {sup 2} An exciting finding in the course of this work is a new fission phenomenon, which we have termed bidmodal fission''. This is described in a subsequent section. The final part summarizes our conclusions based on the unexpectedly long half-lives and surprising fission properties of the heaviest nuclei. 27 refs., 19 figs.
Date: October 22, 1990
Creator: Hulet, E. K.
System: The UNT Digital Library
Use of dome (meniscus) lenses to eliminate birefringence and tensile stresses in spatial filters for the Nova laser (open access)

Use of dome (meniscus) lenses to eliminate birefringence and tensile stresses in spatial filters for the Nova laser

We document the concept and the design method for dome lenses that have a compressive pressure applied to the periphery. Dome (meniscus) lenses can eliminate both birefringence and tensile stresses if used in evacuated spatial filters where a pressure difference is present across the lenses. Calculations show that spatial filter birefringence is an insignificant 3 nm within the portion of a 740-mm Nova spatial filter dome lens illuminated by the laser beam. Membrane stresses are everywhere compressive, varying from {minus}1.2 to {minus}2.4 MPa, and are nearly uniform over the illuminated portion of the lens. Eliminating sources of birefringence on the Nova laser could increase the energy on target with Type II/Type II frequency conversion from {approximately}50% to the {approximately}70% level attainable with Type I/Type II frequency conversion. Eliminating tensile stresses may reduce the damage and catastrophic failure that has occurred in some Nova spatial filter input lenses. The major disadvantage of using dome lenses on Nova is the cost of new lenses which could range up to $50,000 per lens for the material and $20,000 per lens for finishing. 15 refs., 7 figs.
Date: October 22, 1990
Creator: Pitts, John H.; Kyrazis, Demos T.; Seppala, Lynn G. & Bumpas, Stanley E.
System: The UNT Digital Library