Focusing neutrons by means of converging guides:

Peter Böni, JRA3, Neutron Optics

Doubly tapered glass channels coated with supermirror focus the beam to a small spot thus increasing the neutron flux at the sample position. The supermirror is composed of an interference coating of 360 layers Nickel/Titanium ranging in thickness from 45 Å – 700 Å.
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The performance of the focusing unit is simulated by means of Monte-Carlo simulations (McStas from Risø National Laboratory). The calculations demonstrate an intensity gain of approximately a factor of 3.5.

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	Picture JRA8 (JPG, 300KB)	Detector
	Picture JRA8(JPG, 116KB)	Beam on
	Picture JRA8(JPG, 284KB)	Trevor

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