A peak height measurement system (PHMS) is described which detects and measures the peak height of several simultaneous pulses with peaks as narrow as 1 nsec. Jitter in the input pulses produces no error in the measured heights. A detailed description of the peak detector circuit is given, and an experimental setup is presented for determining twohyphen;photon absorption crosshyphen;sections with PHMS. It is expected that this system will see application to numerous experiments which use pulsed lasers.
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