High-dynamic-range transmission-mode detection of synchrotron radiation using X-ray excited optical luminescence in diam

Diamond is a preferable choice for the X-ray transmissionmode scintillator due to its low X-ray absorption, high radiation hardness, and remarkable thermal and mechanical properties. Video monitoring of X-ray excited optical luminescence in thin diamond plates is commonly used for this purpose.

we have demonstrated a more than one order of magnitude improvement in responsivity of X-ray excited luminescence in a thin (nearly transparent for hard X-rays)diamond scintillator by introduction of NV defect states. This was demonstrated using a simple imagingscheme in the visible range with exposure times for individual frames from 0.01 to 5 s. Thus, an imaging device using the new scintillator can provide minimally invasive real-time transmission-mode imaging of photon flux density without disruption of X-ray instrument operation. Further improvement in responsivity can be achieved by exploring other highly luminescent defect centers, reducing the influence of competing non-radiative processes (e.g. via control of crystal lattice quality) as well as by using more advanced imaging detectors and image intensifiers. Outcomes of such studies may lead to the next-generation technology for beam diagnostics at large-scale X-ray user facilities.

CSMH offers products such as diamond windows, boron-doped diamonds, and nitrogen-doped diamonds, which can meet the application requirements of X-ray synchrotron radiation.