Difference between revisions of "CrossTalk"
| Line 8: | Line 8: | ||
=Detector physics= | =Detector physics= | ||
==Summary== | ==Summary== | ||
| − | Neutron energy deposition from collisions with hydrogen and carbon are converted to electron equivalent light output by MCNP-POLIMI. Neutron collisions | + | Neutron energy deposition from collisions with hydrogen and carbon are converted to electron equivalent light output by MCNP-POLIMI. Neutron collisions that all occur whithin a pulse collection time of 10 ns of each other are summed. If a pulse's total light output exceeds 0.03 MeVee, it is considered a detection. The value 0.03 MeVee was chosen as the detector's light output threshold because it corresponds to a mean neutron energy deposit of 0.2 MeV. |
| − | |||
| + | ==Detectpor responce== | ||
The electron equivalent (MeVee) conversion functions for neutrons were measured for plastic (BC 420) scintillators as a function of neutron energy deposit, <math>E_{n}</math>. For deposit on hydrogen the measurements fit the following quadratic function: | The electron equivalent (MeVee) conversion functions for neutrons were measured for plastic (BC 420) scintillators as a function of neutron energy deposit, <math>E_{n}</math>. For deposit on hydrogen the measurements fit the following quadratic function: | ||
Revision as of 21:35, 18 July 2016
Go back MCNP simulations
Geometry
An array of 6 detectors are placed radially at a distance of 1 meter from an uncorrelated 252-CF source. The image below shows a top down view of the simulation geometry. The detector setups have a vertical extent of 30".
Detector physics
Summary
Neutron energy deposition from collisions with hydrogen and carbon are converted to electron equivalent light output by MCNP-POLIMI. Neutron collisions that all occur whithin a pulse collection time of 10 ns of each other are summed. If a pulse's total light output exceeds 0.03 MeVee, it is considered a detection. The value 0.03 MeVee was chosen as the detector's light output threshold because it corresponds to a mean neutron energy deposit of 0.2 MeV.
Detectpor responce
The electron equivalent (MeVee) conversion functions for neutrons were measured for plastic (BC 420) scintillators as a function of neutron energy deposit, . For deposit on hydrogen the measurements fit the following quadratic function:
and for deposit on carbon:
A light output of 0.03 MeVee corresponded to an average neutron energy deposition of 0.2 MeV in the scintillator.
Go back MCNP simulations