Calibration and equivalency analysis of image plate scanners

Abstract

A universal procedure was developed to calibrate image plate scanners using radioisotope sources. Techniques to calibrate scanners and sources, as well as cross-calibrate scanner models, are described to convert image plate dosage into physical units. This allows for the direct comparison of quantitative data between any facility and scanner. An empirical relation was also derived to establish sensitivity response settings for arbitrary gain settings. In practice, these methods may be extended to any image plate scanning system.

Electromagnetic field growth triggering super-ponderomotive electron acceleration during multi-picosecond laser-plasma interaction

“…1c) 41,42 . The dosimeters are image plates (IPs), which were scanned with an absolutely calibrated IP scanner (Typhoon FLA-7000) 43 . An IP signal can be converted to an X-ray energy absorbed in the IP layer with a calibration coefficient (3.28 ± 0.31) × 10 −13 J PSL −1 .…”

Reflective multilayer optic as hard X-ray diagnostic on laser-plasma experiment

“…The image plates were read out by a calibrated Fuji-FLA-7000 scanner. 22 Pb collimators were installed between the multilayer mirror and the image plate detector to reduce background Rev. Sci.…”

Iron X-ray Transmission at Temperature Near 150 eV Using the National Ignition Facility: First Measurements and Paths to Uncertainty Reduction

“…The image plates (IP-TR) were scanned using the NIF's IP scanner with 25-micron pixels. The digital images were converted to linear units based on photo-stimulated luminescence (PSL) using standard techniques [24], yielding the image presented in Figure 4. For soft X-rays the PSL signal is proportional to deposited energy (eV/µm 2 ), but the scaling factors in the literature vary by a factor of two [17,23].…”

“…The X-ray photons arriving at the image plate detector excite metastable states in a phosphor medium, which in turn are digitized using an optical readout system that first uses a scanning laser to trigger release of the metastable states via photo-stimulated luminescence (PSL) and then records the luminescence using a calibrated photomultiplier tube. The digitized data are mathematically converted back to linear units (PSL per pixel) following prior work [24]. The data therefore include statistical fluctuations in (1) the incident photon fluence (photons per pixel); (2) the uniformity of response of the phosphor medium; and (3) the photomultiplier digitization (noise).…”