Beam Conditioning
Slits, filters, masks and apertures that define the beam and manage its power, from undulator beamlines to superconducting wigglers.
At a glance
- Angled water-cooled copper blades (OFHC or Glidcop) with a tungsten hard edge defining the beam.
- One motor sets the slit gap and a second scans the slits in the beam.
- Actuator resolution to 0.1µm, with 5µm repeatability in open loop and <1µm with an encoder.
- Thermally isolated design for thermal stability and minimal drift.
- Canted undulator slits with a bypass aperture for the adjacent canted beam.
- Very high heat load slits absorbing >10kW per blade.
- Graphite filters up to 500µm thick, absorbing >6kW.
- Slit blade design optimised for the power requirements of the beamline.

In this range
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Primary Slits
Centre opening and scanning undulator slits. L-aperture slits are available for high-power applications and canted undulator geometries.
- Resolution
- 0.1µm
- Repeatability
- 5µm open loop, <1µm with an encoder
- L-aperture
- ±5mm horizontal and vertical travel
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Canted Undulator Slits
GSECARS and HPCAT at the Advanced Photon Source
Designed for APS 200mA ring current operation, with a tungsten hard edge thermally decoupled from the Glidcop body.
- Translation
- ±4mm, 0.5μm /step
- Slit gap
- 4mm to -0.2mm
- Limits
- Meets APS Glidcop limits of 300°C and 400MPa
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Very High Heat Load Slits & Filters
Imaging and Medical Beamline, Australian Synchrotron
Designed for a superconducting multipole wiggler with white beam power densities >120 W/mm2.
- Horizontal
- >10kW per blade
- Vertical
- >7kW per blade
- Filters
- 5 paddles, each with 3 graphite foils and a bypass aperture
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Power Management Apertures
GSECARS at the APS; IMBL at the Australian Synchrotron
Masks and apertures in water-cooled Glidcop for beam conditioning and power management.
- Pinhole
- Absorbs >2kW; exit aperture 1.1mm × 0.7mm
- Fixed mask
- Limits the wiggler fan to 5mrad, absorbing >8kW
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Fixed Mask & Differential Pump
XFM at the Australian Synchrotron; HPCAT and GSECARS at the APS
A water-cooled fixed mask in a windowless interface to the front end, with differential pumping across the mask via a pair of ion pumps.
Discuss your project
Tell us about your beamline and what you need. An engineer will reply.