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| Electron Gun: | |
|---|---|
| Beam Diameter | Less than 1 mm at sample |
| Beam Current | Up to 1µA |
| Beam Voltage | 0 to 3000V |
| Materials | 304 SST and Al2O3 |
| Filament | Long life thoriated iridium hairpin, easily replaceable |
| Mounting | Gun assembly removable as a single unit |
| Diameter | 15.9 mm OD for minimal collector screen obstruction |
| Grids: | |
|---|---|
| Number of Grids | Four |
| Material | Hard Chrome-plated 304SST; 40 lines/cm |
| Transmission | 83% per grid |
| Mesh Orientation | Aligned to minimize Moiré effects |
| Geometry | Strong and resilient; may be cleaned if necessary. Grids and collector screen are epicentric |
| Collector Screen: | |
|---|---|
| Material | Ground optical quality Pyrex glass, coated with SnO2 and phosphor |
| Mounting | Special design avoids thermal stresses during bake out, and minimizes chance of damage from mechanical shock |
| Phosphor | P2 is standard, others available. Durable SnO2 coating allows recoating with phosphor |
| Optics Assembly: | |
|---|---|
| Mounting | Complete unit mounted on 8" OD knife edge flange. |
| Insertion Length | 8 inches (flange face to sample) standard, other lengths available |
| Sample Clearance | .75 inches from forward end of shield |
| Viewport | Integral 4" view port |
| Shield | Mu metal shield standard, stainless steel available |
| Electrical Connections | Bakeable MHV feedthrus on mounting flange |
| Viewing Aperture | 96º viewed from either front or back |
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Electronics:Compatible with Model 11-020 LEED Electronics.Options & Modifications:Model RVL 8-120SH (photo at left) has an integral shutter actuated by a rotary motion feedthru on the mounting flange . Call for details and an outline drawing.We can also supply nonstandard flange configurations, insertion lengths, and other custom features. Call for details. |