Digital Time-Resolved Spot Diagnostic
- Mission Support and Test Services, LLC (MSTS)
- Pulsed Power Physics Branch, Plasma Physics Division, Naval Research Laboratory
The digital time-resolved spot diagnostic (D-TRSD) is intended to be a fast-response, time-dependent beam diagnostic for measuring the spot size emitted from radiographic x-ray sources. It will measure spot sizes from submillimeters up to several millimeters for photon energies in the range of 150 keV to 20 MeV with doses as low as 0.03 rad up to 500 rad. The D-TRSD performs fast data acquisition as radiographic x-ray sources typically produce pulses in the tens of nanosecond ranges. The system will be optimized to capture multiple individual pulses in time within the same data record. The data collected will be used to support beam tuning and source optimization with on-the-fly evaluation of radiographic source performance. The diagnostic is based on penumbral imaging techniques. A scintillating fiber array of parallel aligned fibers is positioned in the beam path with a high-Z rolled edge inserted between the source and the array, thereby creating the penumbral x-ray signal that is captured by the D-TRSD system. The light from the scintillation conversion is recorded by individual avalanche photodiode detectors integrated into custom digitizer electronics. The penumbra is used to calculate the spot of the beam on the axis orthogonal to the fiber array based on the magnification from the rolled edge, the resolution of the spaced fibers, and the rotation of the array normal to the beam path. Many arrays can be used to capture additional spot widths about different rotations. The D-TRSD system is modular, software-driven, and easier to use than legacy TRSD systems.
- Research Organization:
- Nevada National Security Site/Mission Support and Test Services LLC (NNSS/MSTS), North Las Vegas, NV (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP)
- DOE Contract Number:
- DE-NA0003624
- OSTI ID:
- 1569849
- Report Number(s):
- DOE/NV/03624-0568
- Journal Information:
- SPIE Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXI, Vol. 11114; Conference: Paper submitted for SPIE Optics + Photonics 2019 held in San Diego, CA, from August 11 to 15, 2019.; Related Information: https://www.osti.gov/biblio/1558453 https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11114/2528451/Digital-time-resolved-spot-diagnostic/10.1117/12.2528451.short
- Country of Publication:
- United States
- Language:
- English
Time-Resolved Spot Size Measurements From Various Radiographic Diodes on the RITS-3 Accelerator
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journal | October 2006 |
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