CaF2 window developed for ultra-high vacuum system.

Rolling Contact Fatigue in Ultra High Vacuum

High Productivity Vacuum Blasting System

In order to increase the productivity and economics of an existing (or baseline) vacuum blasting technology, which has been used to remove radioactive contamination, PCBs, and leadbased paint at Department of Energy (DOE) sites, the redevelopment and design of certain components has been initiated. These new components include a new rectangular blast nozzle, a blasthead with a wind curtain and ...

Direct-write polymer nanolithography in ultra-high vacuum

Polymer nanostructures were directly written onto substrates in ultra-high vacuum. The polymer ink was coated onto atomic force microscope (AFM) probes that could be heated to control the ink viscosity. Then, the ink-coated probes were placed into an ultra-high vacuum (UHV) AFM and used to write polymer nanostructures on surfaces, including surfaces cleaned in UHV. Controlling the writing speed...

Selective Hydrogenation of Acetylene over Palladium in Ultra High Vacuum

Under ultra-high-vacuum conditions, precoverage of a palladium(ll1) surface with hydrogen does not affect either the kinetics or the extent of acetylene uptake at 175 K. The subsequent reactive behavior of the system is however radically altered. Benzene formation is strongly suppressed, the transformation of adsorbed acetylene to another species (@-phase) is enhanced, and the yield of ethylene...

The Plasma Window: a Windowless High Pressure-vacuum Interface for Various Accelerator Applications*

The Plasma Window is a stabilized plasma arc used as an interface between accelerator vacuum and pressurized targets. There is no solid material introduced into the beam and thus it is also capable of transmitting particle beams and electromagnetic radiation with low loss and of sustaining high beam currents without damage. Measurements on a prototype system with a 3 mm diameter opening have sh...