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Abstract. Recently we developed an advanced radio frequency timer of keV energy electrons. It is based on a helical deflector, which performs circular sweep of keV electrons, by a means of 500 MHz radio frequency field. By converting a time distribution of incident electrons to a hit position distribution on a circle, this device achieves extremely precise timing. Streak Cameras, based on similar principles, routinely operate in the ps and sub-ps time domain but have substantial dead time associated with the readout system. Here, the position sensor, consisting of microchannel plates and a delay-line anode, produces ~ns duration pulses. The dead time of the device in this case is determined by the propagation time of signals in a delay-line, which are around 20 ns duration. A possible application of this new timing technique is in the Radio Frequency Photo Multiplier Tube. Measurements made with different photocathodes and sub-ps duration laser pulses, synchronized to the radio frequency power, produced a timing resolution of less than 10 ps. Also, it is demonstrated that the essence of this technique allows for the performance of absolute and precise calibration of its time scale. This technique has potential applications in a large variety of scientific devices, where ultra-high precision time measurement is a crucial factor.
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