Ultra Fast Multiscalers / Questions and Answers

I wanted to measure with the MCS6A intensity correlation with the device (build histogram of coincidence counts between different channels as a function of detection time difference). Is this possible using the MPANT software?

There are two features in the software for such correlations between different channels:

- In the hardware settings dialog, there is a checkbox "time differences". It can be used together with "endless" sweeps. The reference channel can be selected as either CH1, CH2 or CH6 (=START). The time spectra show then the counts versus the time difference to an event in the reference channel. See in the manual page 5-6:

An acquisition mode "Time differences" is implemented for analyzing pulse trails. In this mode the first stop event is used as a reference point and for following stop events the time difference to the reference is calculated. The displayed spectrum is then a relative time distribution of stop events related to the reference point. Even wrap around mode works in this differential mode. The first stop event that falls out of the chosen time range after a reference event is taken as a new reference point.

- If the sweep range is less than 65536 channels, you can create dualparameter spectra in the spectra dialog. Click the "Add Multi.." button, see in the manual chapter 5.1.6. The "threshold" value is a minimum number of time bins between the reference event in one channel and the event in the other channel.

We offer also a software option "autocorrelation", see in the manual chapter 7. For the price of this option please contact your vendor.

Ultra Fast Multiscalers