Design and optimization of a modular setup for measurements of three-dimensional spin polarization with ultrafast pulsed sources

Journal Article · Tue Mar 15 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4943255· OSTI ID:22597104

Rossi, G. ^[1]; Petrov, V. N. ^[2]; Brajnik, G.; Carrato, S. ^[3]; Ciprian, R.; Torelli, P.; Krizmancic, D.; Salvador, F.; De Luisa, A.; Panaccione, G. ^[4]; Lollobrigida, V. ^[5]; Sergo, R.; Gubertini, A.; Cautero, G. ^[6]

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1. Dipartimento di Fisica, Università degli studi di Milano, Via Celoria 16, 20133 Milano (Italy)
2. Saint Petersburg State Polytechnical University, Politechnicheskaya Street 29, 195251 Saint Petersburg (Russian Federation)
3. Università degli Studi di Trieste, Piazzale Europa 1, 34127 Trieste (Italy)
4. Laboratorio TASC, IOM-CNR, S.S. 14 km 163.5, Basovizza, 34149 Trieste (Italy)
5. Dipartimento di Matematica e Fisica, Università Roma Tre, I-00146 Rome (Italy)
6. Sincrotrone Trieste S.C.p.A, Strada Statale 14-km 163.5 in AREA Science Park, Basovizza, 34149 Trieste (Italy)

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).

• OSTI ID: 22597104
• Journal Information: Review of Scientific Instruments, Vol. 87, Issue 3; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AUGER ELECTRON SPECTROSCOPY
ELECTRON BEAMS
ELECTRON DIFFRACTION
ELECTRONS
ELECTROSTATIC ACCELERATORS
FREE ELECTRON LASERS
HARMONIC GENERATION
LIGHT SOURCES
MAGNETIC FIELDS
MOTT SCATTERING
POLARIMETERS
PULSES
SPIN
SPIN ORIENTATION
SYNCHROTRON RADIATION
SYNCHROTRONS
THIN FILMS
THREE-DIMENSIONAL CALCULATIONS
X RADIATION