MERLIN - A meV resolution beamline at the ALS

Ruben Reininger, John Bozek, Yi De Chuang, Malcolm Howells, Nicholas Kelez, Soren Prestemon, Steve Marks, Tony Warwick, Chris Jozwiak, Alessandra Lanzara, M. Zahid Hasan, Zahid Hussain

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

An ultra-high resolution beamline is being constructed at the Advanced Light Source (ALS) for the study of low energy excitations in strongly correlated systems with the use of high-resolution inelastic scattering and angle-resolved photoemission. This new beamline, given the acronym Merlin (for meV resolution line), will cover the energy range 10-150 eV. The monochromator has fixed entrance and exit slits and a plane mirror that can illuminate a spherical grating at the required angle of incidence (as in the SX-700 mechanism). The monochromator can be operated in two different modes. In the highest resolution mode, the energy scanning requires translating the monochromator chamber (total travel 1.1 m) as well as rotating the grating and the plane mirror in front of the grating. The resolution in this mode is practically determined by the slits width. In the second mode, the scanning requires rotating the grating and the plane mirror. This mode can be used to scan a few eV without a significant resolution loss. The source for the beamline is a 1.9 m long, 90 mm period quasi periodic EPU. The expected flux at the sample is higher than 1011 photons/s at a resolving power of 5 × 104 in the energy range 16-130 eV. A second set of gratings can be used to obtain higher flux at the expense of resolution.

Original languageEnglish (US)
Title of host publicationSYNCHROTRON RADIATION INSTRUMENTATION
Subtitle of host publicationNinth International Conference on Synchrotron Radiation Instrumentation
Pages509-512
Number of pages4
DOIs
StatePublished - 2007
EventSYNCHROTRON RADIATION INSTRUMENTATION: 9th International Conference on Synchrotron Radiation Instrumentation - Daegu, Korea, Republic of
Duration: May 28 2006Jun 28 2006

Publication series

NameAIP Conference Proceedings
Volume879
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherSYNCHROTRON RADIATION INSTRUMENTATION: 9th International Conference on Synchrotron Radiation Instrumentation
CountryKorea, Republic of
CityDaegu
Period5/28/066/28/06

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Keywords

  • ALS
  • Beamline
  • EPU
  • EUV
  • Monochromator

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    Reininger, R., Bozek, J., Chuang, Y. D., Howells, M., Kelez, N., Prestemon, S., Marks, S., Warwick, T., Jozwiak, C., Lanzara, A., Hasan, M. Z., & Hussain, Z. (2007). MERLIN - A meV resolution beamline at the ALS. In SYNCHROTRON RADIATION INSTRUMENTATION: Ninth International Conference on Synchrotron Radiation Instrumentation (pp. 509-512). (AIP Conference Proceedings; Vol. 879). https://doi.org/10.1063/1.2436110