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NIF Beam Specifications

Neutron Energy Spectra

TRIUMF offers three different locations for testing with neutrons.  The neutron spectra of the TRIUMF neutron beams are similar to the JEDEC atmospheric neutron reference spectrum, as can be seen in the image below.

Beam characteristics

The beam specifications for each location are given in the table below. The neutron flux is monitored with BF3 counters and dosimetry for calibrations is regularly performed using activation foils of nickel, aluminum, carbon, and gold.

 

 

TNF neutronsBL1B neutronsBL2C neutrons (no longer in use)
Energy

Thermal to 400 MeV

1/E spectrum to 480 MeV1/E spectrum to 120 MeV
 Flux (neutrons/cm²/s)

2x10⁶ to 3x10⁶ above 10 MeV

5x10⁵ thermal energies

10³ to 5x10⁵ above 10 MeV

10³ to 5x10⁴ above 10 MeV

 Spot Size

5x12 cm

4 to 60 cm diameter

30 to 150 cm diameter

Spot Homogeneity

+/- 10%

+/- 10%

+/- 10%

Beam Counting and Monitoring System

BF₃ Counter and Activation Foils

BF₃ Counter and Activation Foils

BF₃ Counter and Activation Foils
Device-Positioning System

Movable Trolley with positive stop

Remote-controlled X-Y platform with laser alignment

Remote-controlled X-Y platform with laser alignment
Access Conditions

6 m cable length to Control Area

20 m cable length to Control Area

20 m cable length to Control Area

TNF Mounting plate

At TNF, DUTs are mounted onto a movable trolley.  A schematic drawing of the mounting plate is shown here.  

Note that all dimensions on the drawing are in inches.