Design of terahertz-wave Doppler interferometric velocimetry for detonation physics
| Autor: | Li-Guo Zhu, Wang Detian, Liu-Wei Guo, Xu Zhang, Shou-Xian Liu, Zhai Zhaohui, Chang-Lin Sun, Zhong Sencheng, Jiang Li, Qiao Liu, Kun Meng, Du Lianghui, Yu-Si Liu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Physics Wavefront Physics and Astronomy (miscellaneous) Explosive material Terahertz radiation business.industry Detonation velocity Detonation 02 engineering and technology Velocimetry 021001 nanoscience & nanotechnology 01 natural sciences symbols.namesake Interferometry Optics 0103 physical sciences symbols 0210 nano-technology business Doppler effect |
| Zdroj: | Applied Physics Letters. 116:161102 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.5142415 |
| Popis: | The diagnosis of the initiation and growth of detonation in high explosives (HEs) is important in detonation physics. We designed and experimentally demonstrated a non-invasive high-precision free-space terahertz-wave Doppler interferometric velocimetry (TDV) design for diagnosing the transient detonation processes in HEs. The system can non-intrusively record the propagation of the shock/detonation wavefront inside HEs continuously and measure key detonation parameters (position/displacement, detonation velocity, etc.). A detailed quasi-optical design for TDV is discussed. The terahertz penetration ability and the refractive index of representative HEs are presented in the frequency range of 0.2–1.4 THz. Additionally, a typical shock-to-detonation transition of an insensitive high explosive was studied using a prototype 0.212 THz TDV system, which demonstrated the high precision of displacement measurements made using I/Q demodulation. Furthermore, the performance of the TDV technique is discussed. TDV may enable non-invasive and high-precision diagnostics for detonation and shockwave physics. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|