AT-C30-HV is for applications where relatively large apertures (up to 30 mm x 30 mm), and highly accurate slit-scans are required. It is, therefore, an optimum solution for customers with a need for blade motions similar to those of the standard AT-F7-HV slit, who have found the 7 mm opening too small.

The slit system holds four motors that set the position and the opening of the aperture. For each dimension, one motor defines the aperture opening, and another determines the position of the aperture. Because only one motor moves during a one-dimensional scan, the AT-C30-HV is the optimum choice for high precision scans with a fixed and relatively large aperture.

The blades can be installed in two configurations, either providing a 16 mm radius or providing a knife-edge sloping at 0.5 degrees. Standard blades are polished to obtain a roughness better than 25 nm RMS.

In its basic configuration, the AT-C30-HV slit is delivered with a flange-opening and tightening bolts to allow connection with KF-40 flanges.

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Technical specifications

Aperture size
Maximum: 30 mm x 30 mm
Minimum: Full overlap

1 micron per full step

< 2 microns

± 2 microns (over 3 mm)

O-ring sealed, high vacuum 10-5 mbar, low outgassing materials

Standard blades
2 mm thick tungsten carbide blades which can be mounted either with a 0.5 degrees knife-edge or an R16 radius edge

Limit switches (end-of-travel)
Included as standard on all motions

High precision internal rails and carriages

Electrical connections
Limit switches coupled to 2 motor connectors (SUB-D 25 pins male)

2-phase stepping motors

Mechanical dimensions
239 mm x 239 mm x 68 mm
184 mm x 184 mm x 64 mm (housing only)

Mechanical connections
M5-threaded holes on the sides, as shown on the drawing and KF-40 flange connections are on the body of both sides of the slit

≈ 6.1 kg

Outer surface
Anodized aluminum in color nature

Common options
Blades: Other blade shapes and materials
Motors: Custom high-resolution stepping, including IMS motors
Encoders: Back-axle rotary encoders (absolute or incremental)
Adaptors: Other KF(NW) flanges or CF flanges
Special preparation for enabling vacuum <10-6 mbar
Internal wiring of Kapton or wiring with Teflon insulation
Custom connectors