Research centers and laboratories around the world rely on UHV chambers designed and produced by Brush Wellman - Electrofusion Products. These chambers are used for unusual x-ray diffraction applications including crystal analysis and growth.

 

 

BW-Electrofusion can offer you the following features and benefits:

 

· Unique Designs

· Extremely Accurate Layouts

· Built-in Water-Cooling Lines

· Integral Beryllium Windows

· Surface Scatter X-Ray Chambers

· Bakeable to 300°C and Leak Tight

 

All of these specially designed chambers have vacuum barriers, and all metallurgical joints are capable of a 300°C bakeout. The assemblies are all mass spectrometer leak tested to a rate of 1 x 10^-9 atm-cc/sec of helium or better.

 

 

Our CAD/CAM services make possible an extremely accurate layout of detail components. Joints are electron beam welded, TIG welded or vacuum brazed, depending on requirements. Cylindrical shapes are either hot-formed or machined as seamless cylinders. BW-Electrofusion's engineering department creates and submits an approval print of the assembly design for your review and acceptance within four to six weeks after receipt of order.               

 

 

 

BW-Electrofusion's specialty is in the design and building of chambers with integral beryllium windows. Several different window geometries have been successfully fabricated to date, including EB welded arc-segments (the most common), 360° rings or sleeves, or flat disks. Depending on the application, either ultra-high purity IF-1^® (99.8% Be) or standard purity PS-200^® (98.0% Be) is used. UHV chamber housings have inside welds to eliminate virtual leaks. Welding of the beryllium to a UHV chamber is accomplished through the use of an aluminum/stainless steel transition material. Should a bakeout temperature higher than 300°C be needed, the beryllium window can be diffusion bonded to the housing to accommodate the higher bakeout requirement. The assembly can also be pre-qualified by thermal cycling at a specified temperature and time rate. Differential pressure testing and vacuum bakeout under a differential load are other options.