TY - JOUR
T1 - YBCO films as Meissner screens in the control of polarized neutron beams - Observations and calculations
AU - Fitzsimmons, M. R.
AU - Lütt, M.
AU - Kinder, H.
AU - Prusseit, W.
N1 - Funding Information:
We wish to thank R. Pynn for insightful dis-cussionsa nd his encouragementT.h e polarizing supermirrorsw erek indly providedb y P. Boni and D. Clemensf or which we are grateful.D iscussions with F. Tasset are also gratefully acknowledged. This studyw ass upportedb y the US Departmento f Energy, BES-DMS, under Contract No. W-7405-Eng-36.
PY - 1998
Y1 - 1998
N2 - The expulsion of magnetic induction from a thin film of superconducting YBa2Cu3O7 (YBCO) - the Meissner effect, was used to permit the reversal of magnetic fields across the film that produced spin reversal of a polarized neutron beam. We report the design and performance of such a device called a cryo-flipper. We compare the measured performance of the YBCO-cryo-flipper to the performance expected on the basis of calculations of the magnetic fields around the film and the precession of neutron spins through these fields, and comment on the advantages of such a system compared to cryo-flippers based on a superconducting niobium foil.
AB - The expulsion of magnetic induction from a thin film of superconducting YBa2Cu3O7 (YBCO) - the Meissner effect, was used to permit the reversal of magnetic fields across the film that produced spin reversal of a polarized neutron beam. We report the design and performance of such a device called a cryo-flipper. We compare the measured performance of the YBCO-cryo-flipper to the performance expected on the basis of calculations of the magnetic fields around the film and the precession of neutron spins through these fields, and comment on the advantages of such a system compared to cryo-flippers based on a superconducting niobium foil.
UR - http://www.scopus.com/inward/record.url?scp=0032120266&partnerID=8YFLogxK
U2 - 10.1016/S0168-9002(98)00008-4
DO - 10.1016/S0168-9002(98)00008-4
M3 - Article
AN - SCOPUS:0032120266
SN - 0168-9002
VL - 411
SP - 401
EP - 416
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 2-3
ER -