Photon Doppler velocimetry (PDV) is a widely used diagnostic for measuring extreme surface velocities. Due to limited electrical bandwidth, conventional PDV systems suffer from limited velocity dynamic range when measuring extreme phenomena in shock physics. Time lens PDV (TL-PDV) overcomes these limitations by temporally magnifying the Doppler shifted beat frequencies allowing for recording with lower bandwidth electronics. Here we experimentally demonstrate TL-PDV and show a 74 km/s velocity range using only 12.5 GHz electrical bandwidth and a temporal magnification factor of 7.6. Furthermore, we validate this system by measuring Laser-Driven Micro-Flyers (LDMF) traveling at approximately 1 km/s.
A multilayer thin-scintillator concept is described for ultrafast imaging. The individual layer thickness is determined by the spatial resolution and light attenuation length, the number of layers is determined by the overall efficiency. By coating the scintillators with a high quantum-efficiency photocathode, single X-ray photon detection can be achieved using fast scintillators with low light yield. The fast, efficient sensors, when combined with MCP and novel nanostructed electron amplification schemes, is a possible way towards GHz hard X-ray cameras for a few frames of images.
Zhehui Wang, Elena Guardincerri, D. Rathman, M. Azzouz, Cris Barnes, R. Berger, E. Bond, D. Craig, David Holtkamp, J. Kapustinsky, Alexei Klimenko, K. Kwiatkowski, R. Merl, C. Morris, J. Perry, E. Ramberg, R. Reich, A. Ronzhin, K. Warner, R. Williams, Ren-Yuan Zhu
Gigahertz (GHz) imaging technology will be needed at high-luminosity X-ray and charged particle sources. It is
plausible to combine fast scintillators with the latest picosecond detectors and GHz electronics for multi-frame hard Xray
imaging and achieve an inter-frame time of less than 10 ns. The time responses and light yield of LYSO, LaBr3, BaF2 and ZnO are measured using an MCP-PMT detector. Zinc Oxide (ZnO) is an attractive material for fast hard X-ray
imaging based on GEANT4 simulations and previous studies, but the measured light yield from the samples is much
lower than expected.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.