Detector for imaging of explosions: present status and future prospects with higher energy X-rays

TL;DR

The paper reviews the current status of the DIMEX detector for imaging explosions using synchrotron radiation, highlighting its capabilities and discussing future prospects with higher energy X-rays at VEPP-4.

Contribution

It presents the operational features of DIMEX and explores future enhancements with higher energy X-ray applications at VEPP-4.

Findings

DIMEX has ~0.2mm spatial resolution and ~100 dynamic range.

Frame rate up to 8 MHz with 32 images stored per shot.

Potential for higher energy X-ray imaging at VEPP-4.

Abstract

The detector for imaging of explosions (DIMEX) is in operation at the synchrotron radiation (SR) beam-line at VEPP-3 electron ring at Budker INP since 2002. DIMEX is based on one-coordinate gas ionization chamber filled with Xe-CO2(3:1) mixture at 7atm, and active Frisch-grid made of Gas Electron Multiplier (GEM). The detector has spatial resolution of ~0.2mm and dynamic range of ~100 that allows to realize the precision of signal measurement at a percent level. The frame rate can be tuned up to 8 MHz (125 ns per image) and up to 32 images can be stored in one shot. At present DIMEX is used with the X-ray beam from 2T wiggler that has ~20 keV average energy. Future possibility to install similar detector at the SR beam-line at VEPP-4 electron ring is discussed.