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Chapter 1. The electronics

Figure 1-1. A simple electronics setup for the CAEN V785

Before starting be sure that you can secure all of these items, many are available through the NSCL

electronics pool. Figure 1-1 shows the complete setup of the system, due to the varying amount of

familiarity of readers to the electronics, a brief description of the component and what the signal coming

out of it should look like will be given.

We will ﬁrst look at the signal from the pulser. A pocket will work well for this. A pocket pulsers will

give a small negative pulse, but we will invert it later. The signal directly from the pulser will look like

ﬁgure 1-2 when viewed on a scope. The pulser only works when terminated with 50 Ohms.

The pulser will run directly into a NIM based ampliﬁer. This amplifer serves two purposes. First it will

amplify our signal helping it stand out against any noise we might have in the channel. It will also invert

the negative pulser signal giving us the positive signal that is required by the V785. The signal coming

from the bi-polar output of the ampliﬁer will look like ﬁgure 1-3. Adjust the gain on the ampliﬁer until

you output signal has an amplitude of about 2V.

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ADC 400F Handbuch Seite 7