The new Spin Filter
by Diemme Enologia uses disc-shaped polymeric membranes in PVDF, mounted on stainless steel supports.
Back in 2009, Chen and his research group presented a spin filter
that works at room temperature; the filter lets through electrons that have the desired spin direction and screens out the others.
In aliquots of 675 [micro]l, samples were added to a spin filter
and centrifuged at 10 000 rpm for 1 min at room temperature.
Soldner, Institut Laue Langevin 5:25-5:40 [.sup.3]He spin filter
for neutrons M.
The first ferromagnetic electrode in this configuration acts as a spin filter
, while the second ferromagnetic layer acts an a spin detector.
A silica spin disc filter unit or a spin filter
containing silica matrix suspended in 0.75 mol/L potassium acetate (pH 4.6) containing 4 mol/L guanidine hydrochloride (50 [micro]L) was placed in a 1.5-mL microcentrifuge tube, and the plasmid DNA-containing solution was applied to the spin filter
Third, systematic limitations of polarization measurements have been investigated: The beam polarization can now be measured with a completely different method using an opaque [.sup.3]He spin filter
with an uncertainty of 0.1% .
Our approach to neutron polarization relies on the use of nuclear spin polarized [.sup.3]He gas cells as a neutron spin filter
. [.sup.3]He has an extremely strong spin dependent capture cross section with essentially all capture in one spin state.
* A New Approach to Accurate Polarimetry of Polychrometic Cold Neutron Beams with a [.sup.3]He Spin Filter
The 0.496 nm neutron beam is used for neutron radiometry experiments, [.sup.3]He spin filter
development, and neutron dosimetry work.
A new beam-line at the Los Alamos Neutron Science Center (LANSCE) delivers pulsed cold neutrons to the apparatus, where they are polarized by transmission through a large volume polarized [.sup.3]He spin filter
and captured in a liquid para-hydrogen target.
Due to the 1 mT holding field surrounding the experimental apparatus, the neutrons are polarized vertically after leaving the [.sup.3]He spin filter
. While taking hydrogen data, the parity violating asymmetry in n-p capture is therefore seen in a difference of the number of [gamma] rays going up and down.