Research-grade Raman
microspectroscopy goes mobilealphaCART
Portable, freely positionable, fiber-coupled,
confocal Raman system

https://raman.oxinst.com

alphaCART

Bringing the lab to the samplealphaCART is WITec’s portable Raman system for all applications that
require research-grade spectral analysis outside of conventional laboratoryenvironments. The alphaCART’s Raman probe can be flexibly positioned in
front of bulky, immovable or precious objects that can’t be transported to a
microscope or that don’t fit under one.
The alphaCART system leverages the advanced optics and modular designof WITec’s established alpha300 series Raman microscopes and profits
from WITec’s longstanding expertise in fiber coupling technology. Thus,
alphaCART provides the same diffraction-limited spatial resolution andconfocality, high spectral resolution and superior signal sensitivity as all
WITec alpha300 systems.

BenefitsalphaCART enables the nondestructive analysis of:• Oversized samples• Fragile or precious objects (no transport required)• Samples that exhibit fluorescence• Inclusions in various materials• Processes inside reaction chambers• Gases and liquids inside glass containers• Samples at high temperature

Key features
Freely positionable, fiber-coupled Raman probe• High spectral and spatial resolution, confocality and signal sensitivity• Sample survey with white-light illumination and color video camera• Objective, laser and spectrometer configuration options• Rolling flight case containing and protecting all components (optional)• Advanced data post-processing• Polarization-sensitive measurements (optional)• Full compatibility with alpha300 series upgrades and accessories•

System components
Optical fibers
High signal throughput
and optimal beam shape

Raman probe
High confocality andsensitivity; available withwhite-light illuminationand color video camera

Laser
Different wavelengths andoutput powers available

UHTS
spectrometer
Wavelength-optimized withhigh sensitivity and resolution

Laptop with WITec
Software Suite
Data acquisition andadvanced post-processing

Applications

In situ process observation
In situ monitoring of diamond coating
The alphaCART Raman probe can be positioned in front of reaction
chambers, such as the hot-filament chemical vapor deposition (HF-CVD)
reactor shown here. Temperature-dependent Raman spectra wererecorded during diamond coating of a steel tool and subsequent coolingfrom 870°C to 30°C. The study yielded information about thermal stressand the quality of the diamond layer, and crystallographic modificationsof the steel substrate. alphaCART’s high sensitivity and confocality
enabled the detection of the relatively weak Raman signals from the thin
diamond layer through the glass window.
Courtesy of Thomas Helmreich, Maximilian Göltz, Stefan M. Rosiwal,
Chair of Materials Science and Engineering for Metals (WTM),Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Germany.

Analysis of art andhistoric objects
Nondestructive
characterization of theImperial Crown of theHoly Roman Empire

Applications
Raman detection over high background signalsaB3214100 µm
D112233
Intensity (a.u)

Intensity (a.u)

C45400600
Raman shift (cm-1)

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1400

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545400600
Raman shift (cm-1)

800

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Background subtraction
and smoothing

Raman analysis of a poster through protective glass
alphaCART’s high confocality and sensitivity enable Raman analyses of fluorescing materials and weak Raman scatterers, even through protectiveglass. Its Raman probe was positioned in front of a framed poster (A). A white-light image revealed ink spots in different colors (B). Raman signals
recorded at the indicated positions with a 532 nm laser were partially obscured by the high fluorescence background from the paint (C). However,
applying efficient background subtraction and smoothing algorithms revealed the characteristic Raman spectra of the various pigments and of thecoated paper (D).

Analysis of art and historic objects© KHM-Museumsverband

Nondestructive characterization of the Imperial Crownof the Holy Roman Empire
alphaCART was involved in the most thorough analysis to date of theImperial Crown of the Holy Roman Empire, conducted at the Kunsthistorisches Museum in Vienna, Austria. Raman and photoluminescencemeasurements of the Crown’s gemstones provided detailed insights into
this historic treasure, which were published in the Journal of Gemmology(DOI: 10.15506/JoG.2023.38.5.448).

alpha300 S:
Scanning Near-field
Optical Microscopealpha300 A:
Atomic ForceMicroscopealpha300 R:
Confocal Raman
Microscopealpha300 apyron™: AutomatedConfocal Raman Microscope

We take care – WITec uses environmentally friendly printed materials.
While this policy is only a small contribution to a healthy environment, we at
WITec believe that focusing on details can effect positive change in the world.

WITec Microscopesalpha300 Ri:
Inverted Confocal
Raman Microscope

RISE®: Raman Imagingand Scanning ElectronMicroscopealpha300 access:Confocal Micro-Raman System

Find your regional WITec and Oxford Instruments
contact at https://raman.oxinst.com/contact
WITec Headquarters
WITec Wissenschaftliche Instrumente und Technologie GmbH
Lise-Meitner-Str. 6, D-89081 Ulm, Germany
Phone +49 (0) 731 140 700, Fax +49 (0) 731 14070 200
info@witec.de, https://raman.oxinst.com

Explore the alphaCART
product pagehttps://raman.oxinst.com/products/
raman-microscopes/alphaCART