Multi-energy Synchrotron X-Ray Computed Tomography dataset of a Low-temperature Cofired Ceramic sample with 3 different energies.

Summary

This dataset contains X-Ray projection data of a low-temperature co-fired ceramic (LTCC) sample, acquired at the BAMline beamline (BESSY II, Berlin, Germany) in February 2025.

The measurements were performed at 3 different X-Ray energies (30, 40 ,50 keV). The datasets include raw experimental data in HDF5 format, one preprocessed slice per energy, and example reconstructions using the FBP algorithm.

Description

Sample information

The sample is an LTCC daisy-chain test structure, consisting of multiple (4) stacked ceramic layers (CT708, Fraunhofer IKTS) embedded with conductive screen prints (Ag paste) and vertical interconnects (Ag/Pd paste) forming a continuous electrical path. The structure was fabricated in-house using standard LTCC lamination, pressing and sintering processes, then sectioned using a hot knife to smaller sized samples for tomography measurements.

Experimental setup

The measurements were performed at the BAMline beamline [1], in the BESSY II synchrotron radiation facility (Helmholtz-Zentrum Berlin).

The datasets consists of three consecutive scans made using different X-ray energies and exposure times. For each scan, 1800 projections were acquired across a 180° angular range. 

The raw datasets (in hdf5 format) contain:

Raw projections (in the "entry/data/data" dataset), with the 20 first projections being flat-fields.

Experimental metadata (in the "entry/instrument/NDAttributes" group), most importantly the angular information (in the "entry/instrument/NDAttributes/SAMPLE_MICOS_W2" dataset)

In addition to the raw experimental data, we provide:

One pre-processed 2D sinogram per energy level. The sinograms have been created using a slice of interest, and pre-processed using flat-field correction and stripe removal using remove_all_stripe function from [2] .

FBP reconstructions of the given sinograms.

The scanning parameters per energy are as follows:

Energy (keV)
Filters
Exposure time (ms)
Projections

30
600um Be / 500um Al
1500
1800

40
1mm Al / 200um Be
1000
1800

50
1mm Al / 50um Cu
500
1800

References

[1] : H. Markötter, M. Sintschuk, R. Britzke, S. Dayani, and G. Bruno, “Upgraded imaging capabilities at the BAMline (BESSY II),” J. Synchrotron Radiat., vol. 29, no. 5, pp. 1292–1298, Sep. 2022, doi: 10.1107/s1600577522007342.

[2] : N. T. Vo, R. C. Atwood, M. Drakopoulos, and T. Connolley, “Data processing methods and data acquisition for samples larger than the field of view in parallel-beam tomography,” Opt. Express, vol. 29, no. 12, p. 17849, Jun. 2021, doi: 10.1364/oe.418448.