In standard form, the model BOS-25 Beam Observation system has a 25mm diameter active area MCP and P-43 phosphor screen assembly, housed within a 4.50″ (114mm) conflat flange with glass viewport. Electrical connections to the phosophor screen and MCP are made with MHV feedthroughs.
Optional configurations are discussed in detail below and include 6″ (152mm) flange mount (BOS-25-6), dual MCP plates (chevron), SHV feedthroughs, fiberoptic windows, and CCD camera systems.
In standard form, the model BOS-25 Beam Observation system has a 25mm diameter active area MCP and P-43 phosphor screen assembly, housed within a 4.50″ (114mm) conflat flange with glass viewport. Electrical connections to the phosophor screen and MCP are made with MHV feedthroughs.
Optional configurations are discussed in detail below and include 6″ (152mm) flange mount (BOS-25-6), dual MCP plates (chevron), SHV feedthroughs, fiberoptic windows, and CCD camera systems.
| Imaging Area | 25mm Diameter |
|---|---|
| MCP (Standard) | 1.289″ Diam. (BOS-25), 10 micron channel diameter, Imaging Grade, 25mm active area, 12 micron pitch, 12° Bias Angle, 40:1 Aspect Ratio (Standard, BOS-25), 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 | 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 model BOS-25 is available with a 6″ (152mm) flange mount. Feedthroughs are available on edge of flange, or out of the face of the flange (see welded glass window version above) . A welded glass window is standard, with optional removable fiberoptic window version (BOS-25-6/FO) and 3-3/8″ conflat window (BOS-25-6/3.38) version.
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 . BOS-40 systems with extended platforms are shown below.
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 phosphor screen to be removed and re-coated or replaced with a different kind of phosphor, without having to remove the MCP assembly.
| BOS Model Option | BOS-OPT-02/2622 | BOS-OPT-02/2722 | BOS-OPT-02/3710 |
|---|---|---|---|
| Camera | COHU 2622 | COHU 2722 (DualGain) | CIDTEC 3710D |
| Optical Format | 1/2″ Diagonal | 1/2″ Diagonal | 2/3″ Diagonal |
| Resolution | 768H x 494V RS-170 752 x 582 CCIR |
755H x 488V RS-170 752 x 582 CCIR |
755H x 484V RS-170 752 x 582 CCIR |
| Element Pitch (μm) | 8.4 x 9.8 | 8.4 x 9.8 | 12.0 x 13.7 |
| Area (mm) | 6.4 x 4.8 | 6.4 x 4.8 | 9.05 x 6.83 |
| Scanning Formats (Please Specify) | EIA RS-170 CCIR | EIA RS-170 CCIR | RS-170, 2:1 Interlace CCIR |
| Electronic Shutter | 1/60 – 1/10,000 sec | 1/60 – 1/100,000 sec | – |
| Sync. System | Int./Ext. | Int./Ext. | Int./Ext. |
| Signal to Noise (db) | >55 | 58 | 50 |
| Sensitivity (Face Plate Illumination) | Full Output: .65 lux | Full Output: 0.0012 lux | Full Output: 0.5fc |
| Input Power (Watts) | 3.6 | 6 max | 8.5 max |
| Input Voltage | +12 VDC | +24 VDC or 115 VAC | + 15 VDC nominal |
