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UV–Vis Spectrometers

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.

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Updated: Nov 23, 2025

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

Published on: September 22, 2017

Tunable side-bounce monochromator.

Hawoong Hong¹, Jonathan Tischler¹, Xianbo Shi¹

¹Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439, USA.

Journal of Synchrotron Radiation

|January 5, 2021

Summary

This summary is machine-generated.

A new monochromator design enables energy tunability for side-bounce beamlines, overcoming previous limitations. This innovation enhances experimental flexibility and reduces energy loss, particularly at lower energies.

Keywords:

double-crystal monochromators energy tunable side-bounce beamlines

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Area of Science:

Optics
Particle Accelerators
Spectroscopy

Background:

Side-bounce beamlines traditionally operate at a single energy due to fixed-exit angles.
This limitation restricts experimental versatility and data acquisition capabilities.

Purpose of the Study:

To introduce a novel monochromator geometry for achieving energy tunability in side-bounce beamlines.
To provide analytic solutions for the required angular adjustments.
To validate the concept through simulation and experimental considerations.

Main Methods:

Implementation of a new monochromator geometry requiring two additional rotational degrees of freedom.
Derivation of analytic solutions for optimizing these rotation angles.
Validation via ray tracing simulations and two-dimensional parameter searches.
Determination of operational parameters like exit offset and beam steering.

Main Results:

Demonstrated energy tunability for side-bounce beamlines.
Provided precise analytic solutions for the new rotational angles.
Ray tracing confirmed the feasibility and performance of the new geometry.
Identified operational details for beam manipulation and offset control.
Observed a reduction in polarization factor loss at low energies.

Conclusions:

The novel monochromator geometry successfully enables energy tunability in side-bounce beamlines.
The developed analytic solutions and simulation results validate the proposed concept.
This advancement offers enhanced experimental flexibility and improved performance, especially for low-energy applications.