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Here, we demonstrate a nano-sized, one-magnet-only Mott spin junction by measuring the finite spin polarisation of the backscattered electrons. A polarimeter based on spin depen- dences in low-energy (- 10 eV) scattering from a mag- netized iron surface has been demonstrated [61]. This offers high efficiency e, > 1 x 10 . In this review we discuss the basic physics and application of Mott polarimetry. A number of different Mott polarimeter designs are described that illustrate the wide range of .In fact, the Mott spin polarimeter detects the P x (P z) values of an electron ensemble by collecting the electrons along one direction (y in the present configuration), letting these .
mott scattering
mott polarimetry
Electron polarimeters based on Mott scattering are particularly attractive for use in this application because they provide good efficiency and analyzing power, they are . A Mott electron polarimeter for the Mainzer microtron (MAMI) accelerator in Mainz, Germany is developed, demonstrating that the results of asymmetry measurements are . It is mounted on the ID08 beamline at the ESRF light source and consists of a time-of-flight (TOF) energy analyzer coupled to a retarding mini-Mott spin polarimeter. It represents a valid alternative to the spin detection system already available on ID08, especially for the acquisition of wide energy regions, where the TOF technique is .
A Mott polarimeter has been developed to measure the spin polarization of the electron beams produced at CEBAF, the nuclear physics accelerator at Jefferson Lab. The polarimeter measures the counting rate asymmetry in the elastic Mott scattering process, which is non-zero for spin states perpindicular to the electron scattering plane.
The design and performance of a compact Mott detector of electron polarisation based on a concentric cylinder electrode geometry is described. Electrons accelerated in the cylindrical field are scattered from a gold foil and decelerated in the same field before detection. The resultant rejection of inelastically scattered electrons is shown to permit efficient operation of the .KEYWORDS: Mott scattering, efficiency, spin polarimeter, spin polarization, Sherman function, figure of merit 1. Introduction The spin-polarization analysis of electron beams has been used in a variety of applications such as spin-polarized scanning electron microscopy (spin SEM)1–4) and spin-resolved photoemission spectroscopy.5–7) Among .PDF | On Jan 1, 1994, K. Sueoka and others published Mott Spin Polarimeter with Spherical Acceleration Electrodes | Find, read and cite all the research you need on ResearchGate
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mott electron polarimetry
playground surface impact testing equipment
A compact classical electron spin detector based on Mott scattering is described. This Mott polarimeter has an efficiency of 5.610 4 , a maximum counting rate of 500 kcps and bulk size 15 cm25 cm. Electron polarimeters based on Mott scattering are extensively used in atomic and molecular, solid state, nuclear, and high‐energy physics. This use stems from the increasing realization that much additional information concerning many physical processes can be obtained through spin‐dependent measurements. In this review we discuss the basic physics and .fine structures. The Mott-type spin polarimeter achieved an efficiency of only 10-4.5,6 The first step to improve the efficiency was the VLEED-type spin polarimeter,7 whose efficiency was about 100 times higher than that of the Mott-type. The second step was the image-type multichannel spin polarimeter.8,9 The first-generationobtained through spin-dependent measurements. In this review we discuss the basic physics and application of Mott polarimetry. A number of different Mott polarimeter designs are described that illustrate the wide range of operating energies (10 eV-1 MeV) and geometries that can be used in such instruments.
A compact retarding‐potential Mott polarimeter is described that employs a thorium target. When operating at an electron accelerating voltage of 25 kV, the instrument provides effective asymmetry (Sherman) functions Seff between −0.15 and −0.25, the exact value being determined by the inelastic energy loss window selected. The corresponding scattering .
We have developed a compact retarding-type Mott spin polarimeter with a large collection angle at the Hiroshima Synchrotron Radiation Center and obtained a reliable value of the effective Sherman function by a self-calibration method.Download scientific diagram | Basic configuration of spin detector (Mott polarimeter). from publication: Magnetization Analysis by Spin-Polarized Scanning Electron Microscopy | Spin-polarized . We have developed a new compact retarding-potential Mott spin polarimeter and achieved an efficiency of 1.9×10−4 for gold target operating in 25 keV. A novel design of the retarding field .
We describe a new spectrometer for spin resolved photoemission from solids in the soft x-ray energy range. It is mounted on the ID08 beamline at the ESRF light source and consists of a time-of-flight (TOF) energy analyzer coupled to a retarding mini . We have developed a new compact retarding-potential Mott spin polarimeter and achieved an efficiency of 1.9×10−4 for gold target operating in 25 keV. A novel design of the retarding field electron . Expand A compact classical electron spin detector based on Mott scattering is described. This Mott polarimeter has an efficiency of ≈5.6×10−4, a maximum counting rate of 500 kcps and bulk size 15 cm×25 cm. The design of the polarimeter goes back to the classical Mott detector, operating from 100 to 120 kV but it can be combined with conventional analyzers due to its .
We have developed a Mott electron polarimeter for the Mainzer microtron (MAMI) accelerator in Mainz, Germany. At beam energies ranging between 1.0 and 3.5 MeV two double focusing magnet spectrometers collect elastically backscattered electrons from gold targets.
A novel technique for absolute calibration of a Mott polarimeter is described that makes use of electrons of accurately known polarization obtained through chemiionization reactions involving spin polarized He(2 3 S) metastable atoms.This technique has been used to calibrate a compact retarding‐potential Mott polarimeter and values of the effective .
The Mott polarimeter is the most popular detection system of the spin polarization of electron beams. However, the Mott polarimeter has a significant disadvantage, low sensitivity. We propose a multi-stage Mott polarimeter that provides higher sensitivity than .
A modified Rice University‐type compact Mott spin polarimeter operating at 20 kV is adapted to a large commerical hemispherical electron energy analyzer. Normal energy analyzer functions are .efficiency than a classical Mott polarimeter. The ultrahigh efficiency enables the observation of detailed spin-polarized electronic structures with unprecedentedly high . multichannel spin polarimeter are obtained by the method illustrated in (e). PRL 116, 177601 (2016) PHYSICAL REVIEW LETTERS week ending 29 APRIL 2016In particle physics, spin polarization is the degree to which the spin, i.e., the intrinsic angular momentum of elementary particles, is aligned with a given direction. [1] This property may pertain to the spin, hence to the magnetic moment, of conduction electrons in ferromagnetic metals, such as iron, giving rise to spin-polarized currents.It may refer to (static) spin waves, preferential .
cylindrical Mott polarimeter taken from Ref. 25 and (b) spheri cal Mott polarimeter taken from Ref. 32. they place on the ultimate precision of Mott polarimetry. We will also address the question of future Mott scatter ing needs in light of our conclusions. II. EXPERIMENTAL APPARATUS AND DATA ACQUISITION A number of different Mott polarimeter designs are described that illustrate the wide range of operating energies (10 eV–1 MeV) and geometries that can be used in such instruments. . See, e.g., D. I. Lowenstein, in High-Energy Spin Physics, edited by K. J. Heller (American Institute of Physics, New York, 1989), AIP Conference Proc. No. 187 .
In Mott polarimeters, the measurement of the spin polarization of an electron beam along two perpendicular quantization axes is commonly performed by collecting scattered electrons with four independent detectors placed azimuthally at 90° from each other. However, the four intensities are not independent quantities.
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The spin-resolved ARPES experiment was performed with a He-discharge lamp and with a home-built Mott-type spin polarimeter operating at 25 kV attached to a commercial hemispherical electron-energy . A technique for absolute calibration of a Mott polarimeter is described that makes use of electrons of accurately known polarization obtained through surface Penning ionization. . The absolute characterization of a spin polarimeter is reported by measuring the Sherman function with high precision from the analysis of the spin and angle .
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mott spin polarimeter|mott electron polarimetry