Performances and first experimental results of BACH, the beamline for dichroism and scattering experiments at ELETTRA

Journal Article · Wed May 12 00:00:00 EDT 2004 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1757799· OSTI ID:20652944

Zangrando, M; Zacchigna, M; Bondino, F ^[1]; Finazzi, M ^[2]; Pardini, T ^[3]; Plate, M ^[4]; Rochow, R; Cocco, D ^[5]; Parmigiani, F ^[1]

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1. Laboratorio TASC-INFM, S.S. 14 Km 163.5 in Area Science Park, 34012 Trieste (Italy)
2. INFM - Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan (Italy)
3. Applied Physics department - Stanford University, 316 Via Pueblo Mall, Stanford, CA 94305 (United States)
4. Dipartimento di Fisica 'A. Volta', Universita di Pavia, Via Bassi 6, 27100 Pavia (Italy)
5. Sincrotrone Trieste ScpA, S.S. 14 Km 163.5 in Area Science Park, 34012 Trieste (Italy)

BACH, the new soft x-ray beamline for polarization dependent experiments at the Italian synchrotron radiation facility ELETTRA, has been commissioned, characterized and opened to external users. Based on two APPLE II undulators, it covers an energy range between 35 eV and 1600 eV with the control of the light polarization. The monochromator works either in high resolution or high flux mode. Resolving powers of 16000 at 50 eV, 12000 at 90 eV, more than 12000 at 400 eV, 15000 at 534 eV and 6600 at 867 eV have been achieved with the three high resolution gratings. The resolving powers of the high flux grating, which covers the 290 - 1600 eV range, have been measured reaching 7000 at 400 eV and 2200 at 867 eV. The fluxes, in the high resolution mode, range between 4{center_dot}1011 photons/s at 125 eV and 2{center_dot}1010 photons/s at about 1100 eV. Using the high flux grating with the best resolution achievable 1.7{center_dot}1011 photons/s impinge on the sample at 900 eV. Two branches are installed after the monochromator allowing the set-up of two different experimental stations. One of them, besides several facilities for surface preparation and analysis, hosts a compact inelastic soft x-ray spectrometer (ComIXS) dedicated to x-ray emission experiments exploiting the small spot (10 {mu}m in the vertical direction) on the sample. The other branch hosts a liquid helium cryostat equipped with a superconducting coil to perform absorption and transmission experiments with temperatures down to 2 K and magnetic field up to {+-}7 T.

• OSTI ID: 20652944
• Journal Information: AIP Conference Proceedings, Vol. 705, Issue 1; Conference: 8. international conference on synchrotron radiation instrumentation, San Francisco, CA (United States), 25-29 Aug 2003; Other Information: DOI: 10.1063/1.1757799; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ABSORPTION
CRYOSTATS
DICHROISM
EV RANGE 10-100
EV RANGE 100-1000
HELIUM
KEV RANGE 01-10
MAGNETIC FIELDS
MONOCHROMATORS
PERFORMANCE
PHOTONS
POLARIZATION
SOFT X RADIATION
SPECTROMETERS
SUPERCONDUCTING COILS
SYNCHROTRON RADIATION
TRANSMISSION
WIGGLER MAGNETS
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY