Products / Detectors / Diamond XBPM® Detector
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Nanometer Precision for X-ray Beams
The B9 Diamond XBPM® Detector is used for the control of the beam position in experimental beam lines at Synchrotron Light Sources. This detector is an intercepting four-quadrant X-ray beam position detector. The B9 Diamond XBPM® Detector provides high X-ray transparency and is therefore suited for soft X-rays beams. The detector is UHV compatible.

The μ-gap® of the Diamond XBPM® Detector makes it most suitable for high-precision measurements of X-ray beams with a beam diameter in the sub-micron range: a nanometer position resolution is provided for sub-micron beams, and 10-3 of the beam size for standard beam sizes, respectively.
Ideal for precision measurements of X-ray beams in the sub-μm range.
Sensor material:
sCVD diamond
Sensor thickness:
20 μm or 50 μm
Electrode structure:
4 pads with 2 μm gap
Electrode material:
Active area:
3 mm in diameter
The B9 Diamond XBPM® Detector is available in two configurations:
  • Standard configuration with 50 μm sensor thickness, with an X-Ray transmission >90% for X-ray energies above 7.8 keV.
  • Membrane detector with 20 μm sensor thickness, with an X-Ray transmission >90% for X-ray energies above 5.8 keV.
The excellent transparency of the Diamond XBPM® detector prevents the disturbance of the X-ray beam. The electrode of the diamond sensor has a negligible impact to the transmission function of the detector.

For 5 keV X-rays we provide the Diamond XBPM® Detector with a diamond membrane of 20 μm thickness. This makes it best suited as beam monitor at the experimental beam lines of Synchrotron Light Sources.

The beam position as well as the beam intensity is measured with this beam-intercepting monitoring device. The detector has a linear response to the beam intensity of X-ray beams over 10 orders of magnitude. The detector response for a 20 μm XBPM® membrane detector is shown on the right.

The excellent homogeneity of the Diamond XBPM® Sensor allows to perfectly reproduce the beam position and intensity for beam monitoring at experimental beam lines of Synchrotron Light Sources.
The Diamond XBPM® Detector is a four quadrant beam intercepting device. The X-ray beam is typically positioned in the center of the device. The beam intensity is measured by summing the signals of the four quadrants. Changes in signals between left-right and up-down indicate beam movements in x and y respectively.

The gap between quadrants is 2 μm. This allows to measured the beam position in high precision. The position resolution is better than 1e-3 of the beam size and below 1 nm for X-Ray beams of FWHM = 60 nm, as measured at the Nano-Max beamline of the Max-IV laboratory.

The Diamond XBPM® Detector is provided in a UHV compatible packaging, which allows easy handling and installation. The cable length is chosen by the user. The UHV cables are equipped with UHV compatible male SMA or BNC connectors.

The detector structure has a beam pass, which allows to put the detector into a parking position, fully removed from the X-ray beam and let the beam pass without disturbance. The detector can be mounted with M3 screws to any support.
B9 Diamond XBPM® Detector

XBPM at Diamond Light Source Ltd.
The Diamond XBPM detector was developed in cooperation with the Diamond Light Source Ltd., Oxford/UK, with the goal to provide a precision instrument with high X-ray transmission. Several CIVIDEC Diamond XBPM are in use at experimental beam lines of DLS.
XBPM at MAX IV Laboratory
The CIVIDEC Diamond nano-XBPM is used at the NanoMAX and BioMAX beam lines of the MAX IV Laboratory in Lund/Sweden. The XBPM detectors are used to monitor sub-μm X-ray beams of 5-30 keV energy with highest precision.
The Use of single-crystal CVD Diamond as a Position sensitive X-Ray Detector
E. Griesmayer, C. Bloomer, P. Kavrigin, C. Weiss, Proceedings of IBIC2016, Barcelona, Spain, MOPG14, 71-74, 2016

ISBN 978-3-95450-177-9

Applications of single-crystal CVD diamond XBPM detectors with nanometre x-ray beams
E. Griesmayer, P. Kavrigin, C. Weiss, and S. Kalbfleisch, AIP Conference Proceedings, 2054, 060052, 2019


Impact Of Diffusion On The Ionisation Channel Of A Diamond XBPM Detector
C. Weiss, et al., Proceedings of the XRM Conference Taiwan, 2022