Результаты исследований: Научные публикации в периодических изданиях › статья
Spherical neutron polarimetry applied to spin-echo and time-of-flight spectroscopy. / Lelie vre-Berna, E.; Bentley, P.; Bourgeat-Lami, E.; Thomas, M.; Pappas, C.; Kischnik, R.; Moskvin, E.
в: Physica B: Condensed Matter, Том 404, № 17, 2009, стр. 2624-2628.Результаты исследований: Научные публикации в периодических изданиях › статья
}
TY - JOUR
T1 - Spherical neutron polarimetry applied to spin-echo and time-of-flight spectroscopy
AU - Lelie vre-Berna, E.
AU - Bentley, P.
AU - Bourgeat-Lami, E.
AU - Thomas, M.
AU - Pappas, C.
AU - Kischnik, R.
AU - Moskvin, E.
PY - 2009
Y1 - 2009
N2 - The changes in direction of the neutron spin that take place on scattering by a magnetic interaction vector are highly dependent on their relative directions. In some circumstances, without zero-field polarimeter, it is impossible to distinguish between a simple depolarisation and a rotation of the polarisation vector. Motivated by the investigation of chiral magnetic fluctuations, we have implemented the third- generation zero-field polarimeter Cryopad on the neutron spin-echo spectrometer SPAN at the Helmholtz Centre Berlin (HCB). We present the method and the limitations of this novel technique that is now available on IN15 at the ILL. The huge progress accomplished with 3He neutron spin filters/flippers are going to facilitate the exploitation of polarised beams at spallation sources. Zero-field polarimeters like Cryopad are used routinely at several steady-state sources but their design would be inefficient at a pulse source. We have investigated the possibility to implement a zero-field polarimeter on a
AB - The changes in direction of the neutron spin that take place on scattering by a magnetic interaction vector are highly dependent on their relative directions. In some circumstances, without zero-field polarimeter, it is impossible to distinguish between a simple depolarisation and a rotation of the polarisation vector. Motivated by the investigation of chiral magnetic fluctuations, we have implemented the third- generation zero-field polarimeter Cryopad on the neutron spin-echo spectrometer SPAN at the Helmholtz Centre Berlin (HCB). We present the method and the limitations of this novel technique that is now available on IN15 at the ILL. The huge progress accomplished with 3He neutron spin filters/flippers are going to facilitate the exploitation of polarised beams at spallation sources. Zero-field polarimeters like Cryopad are used routinely at several steady-state sources but their design would be inefficient at a pulse source. We have investigated the possibility to implement a zero-field polarimeter on a
U2 - 10.1016/j.physb.2009.06.047
DO - 10.1016/j.physb.2009.06.047
M3 - Article
VL - 404
SP - 2624
EP - 2628
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - 17
ER -
ID: 5506870