In standard form, the model BOS-18 Beam Observation system has a 18mm diameter active area MCP and P-43 phosphor screen assembly, housed within a 2.75″ (70mm) conflat flange with glass viewport. Electrical connections to the phosophor screen and MCP are made with MHV feedthroughs.
In standard form, the model BOS-18 Beam Observation system has a 18mm diameter active area MCP and P-43 phosphor screen assembly, housed within a 2.75″ (70mm) conflat flange with glass viewport. Electrical connections to the phosophor screen and MCP are made with MHV feedthroughs.
Optional configurations are discussed in detail within the product tabs and include dual MCP plates (chevron), SHV feedthroughs, fiberoptic windows, and CCD camera systems.
| Imaging Area | 18mm Diameter |
|---|---|
| MCP (Standard) | 0.975″ Diam. (BOS-18), 10 micron channel diameter, Imaging Grade, 18mm active area, 12 micron pitch, 5° Bias Angle, 40:1 Aspect Ratio (Standard, BOS-18), Max. Gain: 2 x 104 (single plate, Std.) 1000V > 107 (chevron, OPT-01), 2000V |
| Phosphor Screen (Standard) | P-43 with aluminum overcoat. P-43 Peak Wavelength: λ= 545 nm. |
| Power Supply Requirements | 0 – + 1000V, 1mA single MCP (Standard), 0 – + 2000V, 1mA dual MCP (OPT-01), 0 – + 5000V, 1 mA Phosphor Screen |
| Beam Energy Range | 1 eV to over 50 keV |
| Beam Current Range | < 10 μA (with optional beam attenuation grids) |
| Vacuum | 1 x 10-6 Torr or better required to operate MCP, UHV compatible, maximum bakeout temperature 300 C |
| Welded Glass Windows (Standard) | A non-removable glass window that is welded to the flange is standard. This allows bakeout temperatures > 200C. |
The MCP/Phosphor screen assemblies can be mounted on an extended platform at a specific distance from the vacuum sealing surface or BOS window. This distance is specified by the customer (NOTE: Model BOS-40 is shown below, but model BOS-18 with extended platform will look similar).
Using a fiberoptic faceplate for the vacuum window is the optical equivalent of a zero thickness window. Phosphor is coated on the vacuum side surface of the fiberoptic window. The image created at the surface of the phosphor is transmitted through the optical fibers of the window to the front surface (air side) of the window by for easy viewing of the image by eye or mountable camera systems. This design allows the phosophor screen to be removed and re-coated or replaced with a different kind of phosphor, without having to remove the MCP assembly.
