Design and optimization of a modular setup for measurements of three-dimensional spin polarization with ultrafast pulsed sources
Articolo
Data di Pubblicazione:
2016
Citazione:
Design and optimization of a modular setup for measurements of three-dimensional spin polarization with ultrafast pulsed sources / T. Pincelli, V.N. Petrov, G. Brajnik, R. Ciprian, V. Lollobrigida, P. Torelli, D. Krizmancic, F. Salvador, A. De Luisa, R. Sergo, A. Gubertini, G. Cautero, S. Carrato, G. Rossi, G. Panaccione. - In: REVIEW OF SCIENTIFIC INSTRUMENTS. - ISSN 0034-6748. - 87:3(2016 Mar), pp. 035111.1-035111.11. [10.1063/1.4943255]
Abstract:
ULTRASPIN is an apparatus devoted to the measurement of the spin polarization (SP) of electrons
ejected from solid surfaces in a UHV environment. It is designed to exploit ultrafast light sources (free
electron laser or laser high harmonic generation) and to perform (photo)electron spin analysis by an
arrangement of Mott scattering polarimeters that measure the full SP vector. The system consists
of two interconnected UHV vessels: one for surface science sample cleaning treatments, e-beam
deposition of ultrathin films, and low energy electron diffraction/AES characterization. The sample
environment in the polarimeter allows for cryogenic cooling and in-operando application of electric
and magnetic fields. The photoelectrons are collected by an electrostatic accelerator and transport
lens that form a periaxial beam that is subsequently directed by a Y-shaped electrostatic deflector to
either one of the two orthogonal Mott polarimeters. The apparatus has been designed to operate in
the extreme conditions of ultraintense single-X-ray pulses as originated by free electron lasers (up to
1 kHz), but it allows also for the single electron counting mode suitable when using statistical sources
such as synchrotron radiation, cw-laser, or e-gun beams (up to 150 kcps).
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
spin polarization; ulrtafast spectroscopy; free electron laser sources; surface magnetism
Elenco autori:
T. Pincelli, V.N. Petrov, G. Brajnik, R. Ciprian, V. Lollobrigida, P. Torelli, D. Krizmancic, F. Salvador, A. De Luisa, R. Sergo, A. Gubertini, G. Cautero, S. Carrato, G. Rossi, G. Panaccione
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