Speaker
Mr
Lev Shekhtman
(Budker Institute of Nuclear Physics)
Description
A method of imaging of ultra-fast processes, like explosions or fast combustion,
at a synchrotron radiation beam is being developed at the Siberian Synchrotron
and Teraherz Radiation Center (SSTRC). Two stations are equipped with the
detector for imaging of explosions, DIMEX, based on high pressure ionization
chamber, and allowing to record up to 100 one dimensional images with a frame
rate of 8 MHz. However the maximum
flux that DIMEX can detect is limited
as well as the spatial resolution and the frame rate because of the gas technology used. In view of the significant increase of SR
flux at the VEPP-4M beam
line due to the new 9-pole 2 T wiggler, a new detector is being developed for
this beam line, based on Si microstrip sensor. The first Si microstrip detector
prototype has been mounted with a new specially developed front-end ASIC
that allows to record data with a rate up to 40 MFrames/s. The first measurements with this prototype demonstrated significant improvement of all critical
parameters of the detector compared to the gaseous version. The maximum
detected photon rate before saturation is increased by a factor of 10. The spatial resolution is improved from 240 $\mu$m to $\sim$50 $\mu$m (FWHM) and the frame rate is increased by a factor 5.
Primary author
Mr
Lev Shekhtman
(Budker Institute of Nuclear Physics)
