Layout of the experimental site at CSNS Back-n. (IMAGE)

Nuclear Science and Techniques

Layout of the experimental site at CSNS Back-n.

Caption

The figure outlines the experimental setup for white neutron beam tests: neutron beam passes through a variable-aperture neutron switch, collimators 1 and 2 (with a 6 cm lead brick between the switch and collimator 1 to reduce intensity), bombards the partitioned target, and is finally captured by a neutron trap. Only Chamber 1 is installed to verify fission fragment identification. The experiment uses a 30 mm-diameter neutron beam spot with a flux of ~6.1×10⁵ cm⁻²·s⁻¹, operating in CSNS’s dual-bunch mode (25 Hz repetition rate, 410 ns proton bunch interval).

 

Credit

Jia-Jun Zhang

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License

CC BY-NC

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