# 05/12/2011 2n correlation test

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The voltages, thresholds and widths are:

PMT voltage, V | threshold, mV | discr. width, ns | |
---|---|---|---|

PS1 | -1000 | -80 | 20 |

PS1 | -1000 | -80 | 10 |

Let's do the **2n correlation test** with CF252 source. The voltages and thresholds are the same.
First the set up is like:

- ○ PS1 and PS2 are parallel to each other and are faced to the source.
- ○ the CF252 source in the middle
- ○ the distance between PS1(PS2) and source is 6 cm

The total number of events (2n fission events + random coincident) are:

total counts | time | counts/min | counts/sec | |
---|---|---|---|---|

PS1 | 10 min | |||

PS1 | 10 min | |||

PS1+PS2 | 10 min |

Second the set up is like:

- ○ PS1 and PS2 are perpendicular to each other and are faced to the source.
- ○ the CF252 source in the middle
- ○ the distance between PS1(PS2) and source is 6 cm

The total number of events (2n fission events + random coincident) are:

total counts | time | counts/min | counts/sec | |
---|---|---|---|---|

PS1 | 10 min | |||

PS1 | 10 min | |||

PS1+PS2 | 10 min |