For a variety of applications involving the control of ion beam size and current, NEC manufacture three basic models of beam-defining slit systems, with variations of each model. Each model varies in beam power capabilities and geometries.
NEC slits are ideal for applications requiring accurate control of beam size, determination of beam divergence, or limiting beam current. Ours slits are designed for use on injection and high energy beamlines of medium to high current or high energy electrostatic accelerators.
The slit element assemblies utilize all metal seals to the slit housing, with motion transmitted to the elements through stainless steel welded bellows. The beam aperture material and the slit elements are either molybdenum or tantalum, greatly limiting neutron production from light ion beams while providing high temperature tolerance. Custom element materials are also available upon request.
NEC produces three standard models of slits, with various configurations and options for each model. Below is a brief description of each model.
| Model | Beam Power Rating | Maximum aperture | Features | |
| BDS6 | 1000W per element | 1.5″ (3.8cm) |
|
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| BDS8 | 50W per element (100W optional) |
1.2″ (3.0cm) |
|
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| BDS18 | 50W per element (100W optional) |
2.0″ (5.1cm) |
|
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All three models are available in manual or motorized versions. They are all available as either single axis (2-jaw) or double axis (4-jaw).
Several slit element options are also available. The most common configuration utilizes a beveled edge design, minimizing slit edge scattering of the ion beam and providing optimal beam energy control. However, slits can also incorporate a folded design or square edge design, depending on user preference. Please contact NEC for more information on slit element configurations.
For manual slits, we offer a slit current monitor to monitor up to three different slit assemblies.
For a complete motorized slit system, a slit, controller, and logarithmic amplifiers are needed. We offer both local and remote controllers and a complete line of dual channel log amps. Please contact NEC for more information on these components.
