X-Ray sources, detectors and optical components are now used in a wide
range of applications. What is crucial is the absolute calibration of such
devices to permit a quantitative assessment of the system under study. A new
X-ray laboratory has been built in Frascati (ENEA) to develop diagnostics for
nuclear fusion experiments and study applications of these X-ray techniques in
other domains, like new material science, non destructive tests and so on. An
in-house developed selfconsistent calibration procedure is described that
permits the absolute calibration of sources (X-ray emitted fluxes) and
detectors (detection efficiencies) as function of the X-ray photon energy, in
the range 2 - 120 keV. The calibration procedure involves the use of an
in-house developed code that also predicts the spectral response of any
detector in any experimental condition that can be setup in the laboratory. The
procedure has been then applied for the calibration and characterisation of gas
and solid state imaging detectors, such as Medipix-2, GEM gas detector, CCD
camera, Cd-Te C-MOS imager, demonstrating the versatility of the method
developed here.
References
[1]
Pacella, D., Romano, A., Gabellieri, L., Murtas, F. and Mazon, D. (2013) GEM Gas Detectors for Soft X-Ray Imaging in Fusion Devices with Neutron-Gamma Background. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 720, 53-57. http://dx.doi.org/10.1016/j.nima.2012.12.036
[2]
Pacella, D., Dabagov, S., Murtas, F., Romano, A., Hampai, D., Gabellieri, L. and Mazon, D. (2011) Polycapillary Optics for Soft X-Ray Imaging and Tomography. IL NUOVO CIMENTO, 34, 513-520.
[3]
Romano, A., Pacella, D., Mazon, D., Murtas, F., Malard, P., Gabellieri, L., Tilia, B., Piergotti, V. and Corradi, G. (2010) Characterization of a 2D Soft X-Ray Tomography Camera with Discrimination in Energy Band. Review of Scientific Instruments, 81, 10E523.
Llopart, X., Campbell, M., Dinapoli, R., Segundo, D. and Pernigotti, E. (2002) Medipix 2: A 64-k Pixel Readout Chip with 55-μm Square Elements Working in Single Photon Counting Mode. IEEE Transactions on Nuclear Science, 49, 2279-2283. http://dx.doi.org/10.1109/TNS.2002.803788
[6]
Gabellieri, L., Romano, A., Pacella, D., Causa, F., Murtas, F. and Claps, G. (2013) X-Ray Imaging in Tokamaks: Characterization of a C-MOS Imager (Medipix-2). Proceedings of the 40th EPS Conference on Plasma Physics, Espoo, 1-5 July 2013, 5-119.
[7]
Pacella, D., Gabellieri, L., Romano, A., Causa, F., Murtas, F., Claps, G., Lee, S.H., Hong, J., Jang, J. and Choe, W. (2013) GEM-Based Energy Resolved X-Ray Tangential Imaging System on KSTAR. Proceedings of the 40th EPS Conference on Plasma Physics, Espoo, 1-5 July 2013, 5-118.
