## Neutron Larmor Precession Calculator

 Field B(G): Distance L(cm): Neutron wavelength λ (Å):
With the unit on the left,

• For Larmor phase, all the parameters are required.
• For Velocity, only neutron wavelength is needed
• For resonant frequency, only the magnetic field is needed.

## Polarized 3He Neutron Spin Filter Calculator

 Pressure Pcell(bar): Cell length L(cm): Neutron wavelength λ(Å): Empty cell transmission Tcell: 3He polarization PHe:
 Neutron polarization Pn: Unpolarized neutron transmission T: Spin up state transmission T+: Spin down state transmission T-: Neutron flipping ratio: Figure-of-merit Qn:
With the unit on the left,

## Neutron Spin Echo Time Calculator (DC)

 Field B(G): Distance L(cm): Neutron wavelength λ (Å):
 Spin Echo Time τ(ps):

With the unit on the left,

• The calculation is assuming a uniform rectangular field ONLY.

## Neutron Spin Echo Length Calculator (for MWP ONLY)

 Angle θ(deg): Field B(G): Distance L(cm): Neutron wavelength λ (Å):
 Spin Echo Length ξ (nm):

With the unit on the left,

• θ: the angle between the beam and the hypotenuse.
• B: for the ORNL magnetic Wollaston prisms (30G/A).
• L: the distance between the two Wollaston prisms (21cm).
• λ: 5.48Å for CG-4B.

## Neutron Constants

γn: the gyromagnetic ratio

m: the neutron mass

h: the Planck's constant

Scroll to Top