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Title: VESPA: The vibrational spectrometer for the European Spallation Source

Abstract

VESPA, Vibrational Excitation Spectrometer with Pyrolytic-graphite Analysers, aims to probe molecular excitations via inelastic neutron scattering. It is a thermal high resolution inverted geometry time-of-flight instrument designed to maximise the use of the long pulse of the European Spallation Source. The wavelength frame multiplication technique was applied to provide simultaneously a broad dynamic range (about 0-500 meV) while a system of optical blind choppers allows to trade flux for energy resolution. Thanks to its high flux, VESPA will allow the investigation of dynamical and in situ experiments in physical chemistry. Here we describe the design parameters and the corresponding McStas simulations.

Authors:
 [1];  [2];  [3]; ; ;  [4]; ;  [1];  [3]; ;  [5];  [1]
  1. Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen Ø (Denmark)
  2. (Italy)
  3. (Sweden)
  4. Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, 50019 Sesto Fiorentino (Italy)
  5. European Spallation Source ESS AB, SE-221 00 Lund (Sweden)
Publication Date:
OSTI Identifier:
22597988
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 87; Journal Issue: 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DESIGN; ENERGY RESOLUTION; EUROPEAN SPALLATION SOURCE; EXCITATION; GEOMETRY; GRAPHITE; INELASTIC SCATTERING; MEV RANGE 100-1000; NEUTRON DIFFRACTION; NEUTRON REACTIONS; NEUTRONS; PHYSICAL CHEMISTRY; PULSES; SPALLATION; SPECTROMETERS; TIME-OF-FLIGHT METHOD; WAVELENGTHS

Citation Formats

Fedrigo, Anna, E-mail: anna.fedrigo@nbi.ku.dk, Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, 50019 Sesto Fiorentino, European Spallation Source ESS AB, SE-221 00 Lund, Colognesi, Daniele, Grazzi, Francesco, Zoppi, Marco, Bertelsen, Mads, Strobl, Markus, European Spallation Source ESS AB, SE-221 00 Lund, Hartl, Monika, Deen, Pascale P., and Lefmann, Kim. VESPA: The vibrational spectrometer for the European Spallation Source. United States: N. p., 2016. Web. doi:10.1063/1.4952430.
Fedrigo, Anna, E-mail: anna.fedrigo@nbi.ku.dk, Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, 50019 Sesto Fiorentino, European Spallation Source ESS AB, SE-221 00 Lund, Colognesi, Daniele, Grazzi, Francesco, Zoppi, Marco, Bertelsen, Mads, Strobl, Markus, European Spallation Source ESS AB, SE-221 00 Lund, Hartl, Monika, Deen, Pascale P., & Lefmann, Kim. VESPA: The vibrational spectrometer for the European Spallation Source. United States. doi:10.1063/1.4952430.
Fedrigo, Anna, E-mail: anna.fedrigo@nbi.ku.dk, Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, 50019 Sesto Fiorentino, European Spallation Source ESS AB, SE-221 00 Lund, Colognesi, Daniele, Grazzi, Francesco, Zoppi, Marco, Bertelsen, Mads, Strobl, Markus, European Spallation Source ESS AB, SE-221 00 Lund, Hartl, Monika, Deen, Pascale P., and Lefmann, Kim. Wed . "VESPA: The vibrational spectrometer for the European Spallation Source". United States. doi:10.1063/1.4952430.
@article{osti_22597988,
title = {VESPA: The vibrational spectrometer for the European Spallation Source},
author = {Fedrigo, Anna, E-mail: anna.fedrigo@nbi.ku.dk and Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, 50019 Sesto Fiorentino and European Spallation Source ESS AB, SE-221 00 Lund and Colognesi, Daniele and Grazzi, Francesco and Zoppi, Marco and Bertelsen, Mads and Strobl, Markus and European Spallation Source ESS AB, SE-221 00 Lund and Hartl, Monika and Deen, Pascale P. and Lefmann, Kim},
abstractNote = {VESPA, Vibrational Excitation Spectrometer with Pyrolytic-graphite Analysers, aims to probe molecular excitations via inelastic neutron scattering. It is a thermal high resolution inverted geometry time-of-flight instrument designed to maximise the use of the long pulse of the European Spallation Source. The wavelength frame multiplication technique was applied to provide simultaneously a broad dynamic range (about 0-500 meV) while a system of optical blind choppers allows to trade flux for energy resolution. Thanks to its high flux, VESPA will allow the investigation of dynamical and in situ experiments in physical chemistry. Here we describe the design parameters and the corresponding McStas simulations.},
doi = {10.1063/1.4952430},
journal = {Review of Scientific Instruments},
number = 6,
volume = 87,
place = {United States},
year = {Wed Jun 15 00:00:00 EDT 2016},
month = {Wed Jun 15 00:00:00 EDT 2016}
}