Optical design for laser Doppler angular encoder with sub-nrad sensitivity

1998 ◽  
Vol 5 (3) ◽  
pp. 826-828
Author(s):  
Deming Shu ◽  
Ercan E. Alp ◽  
Juan Barraza ◽  
Tuncer M. Kuzay ◽  
Tim Mooney
Keyword(s):  
Laser Interferometer ◽  
Optical Design ◽  
Three Dimensional ◽  
High Energy ◽  
Multiple Reflection ◽  
Laser Doppler ◽  
High Energy Resolution ◽  
Compact Set ◽  
Set Up ◽  
Photon Source

A novel laser angular-encoder system has been developed based on the principles of radar, the Doppler effect, optical heterodyning and self-aligning multiple-reflection optics. Using this novel three-dimensional multiple-reflection optical path, an increase in resolution of 10 to 20 times has been reached compared with commercially available laser Doppler displacement meters or laser interferometer systems. With the new angular encoder, sub-nrad resolution has been attained in the 8° measuring range in a compact set-up [about 60 (H) × 150 (W) × 370 mm (L)] for high-energy-resolution applications at the Advanced Photon Source undulator beamline 3-ID.

A micro-focusing and high-flux-throughput beamline design using a bending magnet for microscopic XAFS at the High Energy Photon Source

2019 ◽  
Vol 26 (5) ◽  
pp. 1835-1842
Author(s):  
Kun Tang ◽  
Lei Zheng ◽  
Yi Dong Zhao ◽  
Shu Hu Liu ◽  
Chen Yan Ma ◽  
...  
Keyword(s):  
Optical Design ◽  
High Energy ◽  
X Rays ◽  
High Energy Photon ◽  
Virtual Source ◽  
Energy Photon ◽  
Synchrotron Source ◽  
Full Field ◽  
Mirror Pair ◽  
Photon Source

An optical design study of a bending-magnet beamline, based on multi-bend achromat storage ring lattices, at the High Energy Photon Source, to be built in Beijing, China, is described. The main purpose of the beamline design is to produce a micro-scale beam from a bending-magnet source with little flux loss through apertures. To maximize the flux of the focal spot, the synchrotron source will be 1:1 imaged to a virtual source by a toroidal mirror; a mirror pair will be used to collimate the virtual source into quasi-parallel light which will be refocused by a Kirkpatrick–Baez mirror pair. In the case presented here, a beamline for tender X-rays ranging from 2.1 keV to 7.8 keV, with a spot size of approximately 7 µm (H) × 6 µm (V) and flux up to 2 × 1012 photons s−1, can be achieved for the purpose of X-ray absorption fine-structure (XAFS)-related experiments, such as scanning micro-XAFS and full-field nano-XAFS.

scholarly journals Novel laser Doppler linear encoder using multiple-reflection optical design for a high-resolution linear actuator

1998 ◽  
Author(s):  
Deming Shu ◽  
Ercan E. Alp ◽  
Juan Barraza, Jr. ◽  
Tuncer M. Kuzay ◽  
Timothy M. Mooney
Keyword(s):  
High Resolution ◽  
Optical Design ◽  
Multiple Reflection ◽  
Laser Doppler ◽  
Linear Actuator ◽  
Linear Encoder

scholarly journals Optical design and performance of the biological small-angle X-ray scattering beamline at the Taiwan Photon Source

2021 ◽  
Vol 28 (6) ◽  
Author(s):  
D.-G. Liu ◽  
C.-H. Chang ◽  
L.-C. Chiang ◽  
M.-H. Lee ◽  
C.-F. Chang ◽  
...  
Keyword(s):  
Small Angle ◽  
Optical Design ◽  
Scattering Data ◽  
High Energy Resolution ◽  
High Flux ◽  
X Ray ◽  
X Ray Scattering ◽  
And Performance ◽  
Photon Source ◽  
Ray Scattering

The optical design and performance of the recently opened 13A biological small-angle X-ray scattering (SAXS) beamline at the 3.0 GeV Taiwan Photon Source of the National Synchrotron Radiation Research Center are reported. The beamline is designed for studies of biological structures and kinetics in a wide range of length and time scales, from angstrom to micrometre and from microsecond to minutes. A 4 m IU24 undulator of the beamline provides high-flux X-rays in the energy range 4.0–23.0 keV. MoB4C double-multilayer and Si(111) double-crystal monochromators (DMM/DCM) are combined on the same rotating platform for a smooth rotation transition from a high-flux beam of ∼4 × 1014 photons s−1 to a high-energy-resolution beam of ΔE/E ≃ 1.5 × 10−4; both modes share a constant beam exit. With a set of Kirkpatrick–Baez (KB) mirrors, the X-ray beam is focused to the farthest SAXS detector position, 52 m from the source. A downstream four-bounce crystal collimator, comprising two sets of Si(311) double crystals arranged in a dispersive configuration, optionally collimate the DCM (vertically diffracted) beam in the horizontal direction for ultra-SAXS with a minimum scattering vector q down to 0.0004 Å−1, which allows resolving ordered d-spacing up to 1 µm. A microbeam, of 10–50 µm beam size, is tailored by a combined set of high-heat-load slits followed by micrometre-precision slits situated at the front-end 15.5 m position. The second set of KB mirrors then focus the beam to the 40 m sample position, with a demagnification ratio of ∼1.5. A detecting system comprising two in-vacuum X-ray pixel detectors is installed to perform synchronized small- and wide-angle X-ray scattering data collections. The observed beamline performance proves the feasibility of having compound features of high flux, microbeam and ultra-SAXS in one beamline.

Numerical and experimental approach towards an energy-efficient compact spinning system

2021 ◽  
pp. 004051752110432
Author(s):  
Malik YH Saty ◽  
Nicholus Tayari Akankwasa ◽  
Jun Wang
Keyword(s):  
Experimental Investigation ◽  
Negative Pressure ◽  
Three Dimensional ◽  
High Energy ◽  
Yarn Properties ◽  
3D Printed ◽  
Yarn Production ◽  
Compact Spinning ◽  
Set Up ◽  
Geometrical Dimensions

Compact spinning with a lattice apron has recently become a very attractive approach for pneumatic compact yarn production spinning systems. One of the main challenges with use of this method is the high negative pressure that leads to high energy consumption. In response to this challenge, we present a numerical and experimental investigation of the effects of a three-dimensional (3D) printed guiding device on the airflow characteristics and yarn properties. Initially, the 3D numerical model of the compact spinning system was set up based on the real geometrical dimensions. Secondly, the 3D prototype was developed, simulated, and analyzed using Solidworks and Ansys. Ultimately, the design, which exhibited low negative pressure along the model domain, was adopted and then 3D printed to enable further experimental investigation. Airflow analysis results illustrated that when using the guiding device with low negative pressure, the active area of negative pressure was increased. This was due to the existence and the special design of the guiding device that prevented the decrease of the negative pressure with atmospheric pressure. This increased the transverse condensing force, which was beneficial for twisting the free-end fiber around the fiber bundle. Experimental results revealed that the three yarns spun with the guiding device achieved significant energy saving when the guiding device was used. Moreover, these yarns spun with the guiding device had better strength, hairiness, and evenness than those spun without a guiding device. The model developed can be further improved and utilized for commercial purposes, as it significantly reduces energy costs while improving yarn properties.

High energy-resolution set-up for Ir L3 edge RIXS experiments

2013 ◽  
Vol 188 ◽  
pp. 150-154 ◽  
Author(s):  
M. Moretti Sala ◽  
C. Henriquet ◽  
L. Simonelli ◽  
R. Verbeni ◽  
G. Monaco
Keyword(s):  
Energy Resolution ◽  
High Energy ◽  
High Energy Resolution ◽  
Set Up

scholarly journals High-Energy-Resolution Resonant Inelastic (Hard) X-ray Scattering (RIXS) at the Advanced Photon Source

2018 ◽  
Vol 31 (2) ◽  
pp. 14-19 ◽  
Author(s):  
Jungho Kim ◽  
D. M. Casa ◽  
M. H. Upton ◽  
T. S. Toellner ◽  
A. H. Said ◽  
...  
Keyword(s):  
Energy Resolution ◽  
High Energy ◽  
High Energy Resolution ◽  
X Ray ◽  
X Ray Scattering ◽  
Photon Source ◽  
Ray Scattering
Sign in / Sign up

Export Citation Format

Share Document