Fiber Bragg sensing of high explosive detonation experiments at Los Alamos National Laboratory

18th APS-SCCM; 24th AIRAPT

Rodriguez, G.^1 ; Sandberg, R.L.^1 ; Jackson, S.I.^2 ; Vincent, S.W.^2 ; Gilbertson, S.M.^1 ; Udd, E.^3

Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos

NM

87545, United States^1

Weapons Experiments Division, Los Alamos National Laboratory, Los Alamos

NM

87545, United States^2

Columbia Gorge Research LLC., Fairview

OR

97024, United States^3

关键词: Dynamic mapping;    Electrical pins;    Fiber Bragg;    Fiber Bragg Grating Sensors;    Front velocity;    High explosive detonations;    Incoherent light;    Los Alamos National Laboratory;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/14/142030/pdf
DOI  :  10.1088/1742-6596/500/14/142030

来源: IOP

【 摘 要 】

An all optical-fiber-based approach to measuring high explosive detonation front position and velocity is demonstrated. By measuring total light return using an incoherent light source reflected from a fiber Bragg grating sensor in contact with the explosive, dynamic mapping of the detonation front position and velocity versus time is obtained. We demonstrate two examples of detonation front measurements: PETN detasheet test and detonation along a multi-HE cylindrical rate stick containing sections of PBX 9501, Comp B, TNT, PBX 9407, PBX 9520, and inert PMMA. In the PETN detasheet measurement, excellent agreement with complementary diagnostics (electrical pins) is achieved, with accuracy in the detonation front velocity at the 0.13% level when compared to the results from the pin data.