PhotoFiss 3-8-11

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TDC Map

TDC Chan Detector
1 Event Trigger
12 Sofiia (neutron detector Beam Right down)
13 Natali (neutron detector Beam Left down)
14 Irina (neutron detector Beam left center)
15 Polina (neutron detector Beam left top)

Scalers

TDC Chan Detector
2 Sofiia-scaler (neutron detector Beam Right down)
4 Natali-scaler (neutron detector Beam Left down)
5 Irina-scaler (neutron detector Beam left center)
6 Polina-scaler (neutron detector Beam left top)


Runs

Date Run Number Comment Run Time
3/8/11 1938 Beam down, D2O target 25 minutes
3/8/11 1939 Beam down, D2O target 10 minutes
3/8/11 1940 Beam down, D2O target 60 minutes
3/8/11 1941 Beam up, D2O target 75 minutes
3/8/11 1944 Beam down, D2O target 55 minutes
3/8/11 1945 Beam up, D2O target 75 minutes
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3/8/11

Scope Pictures

The following scope pictures have beam parameters of 25 MeV beam energy, 0.5 A current and a 2 ns pulse width.

3-8-11.png

Above is a scope picture of the analog signal from the neutron detector Natali inside the gun pulse start signal. The purple signal is the NIM pulse from the level translator (Model PS726).

3-8-11 4.png

Above is a scope picture of TDC start (light blue), stop out from the discriminator (Ortec CF8000)(dark blue), and the gun pulse (green). The TDC is operated between the fall of the start and the rise of the stop.

3-8-11 5.png

Above has the gun pulse in green and the start trigger for the VME crate as light blue.

3-8-11 6.png

Above is a closeup of the trigger start for the VME crate.

3-8-11 6.png

Above is a scope picture of Natali double pulsing. The purple trace is the NIM output of the level translator. The yellow trace is the analog signal from Natali out of the back of the constant fraction discriminator (Ortec CF8000).

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