A novel proton imaging technique was applied which allows a continuoustemporal record of electric fields within a time window of several nanoseconds.This "proton streak deflectometry" was used to investigate transient electricfields of intense (~ 10^17 W/cm^2) laser irradiated foils. We found out thatthese fields with an absolute peak of up to 10^8 V/m extend over millimeterlateral extension and decay at nanosecond duration. Hence, they last muchlonger than the (~ ps) laser excitation, and extend much beyond the laserirradiation focus.
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机译：应用了一种新颖的质子成像技术，该技术可以在几纳秒的时间窗口内连续记录电场。这种“质子条纹偏转法”用于研究强（〜10 ^ 17 W / cm ^ 2）激光辐照的瞬态电场箔纸。我们发现，这些绝对峰值高达10 ^ 8 V / m的场扩展了毫米级扩展，并在纳秒持续时间内衰减。因此，它们的持续时间比（〜ps）激光激发更长，并且延伸的范围远远超出了激光辐照焦点。
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