Abstract
The blow-off impulse is the condition of applied loads of the structural response induced by pulsed beam and the coupling coefficient of impulse is a key parameter to estimate the potential of producing impulse. A new kind of impulse probe was developed and tests were conducted to measure the impulses of several kinds of materials exposed to electron beam on “Flash II” accelerator. Experimental results of these tests show that:(1) when the energy fluxes are in the range of 150 ∼ 183 J·cm-2, the average coupling coefficient of blow-off impulse of the soft graphite is 0.40 Pa·s/(J·cm-2), and that of C/E is 0. 94 Pa·s/(J·cm-2). (2) as a structural material, the C/E composite has better anti-radiation performance than aluminium material because the average coupling coefficient of C/E is less than that of aluminium.
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