Beamline description
BACH is a beamline conceived and optimised to perform light polarisation dependent experiments in the 35-1600 eV photon energy range.
The radiation source, based on two APPLE-II helical undulators, is designed to deliver a high photon flux at high resolving power.
The photon dispersion system is based on a Padmore variable angle spherical grating monochromator hosting three gratings with a resolving power of 20000-6000, 20000-6000, and 15000-5000 in the energy ranges 35-200 eV, 200-500 eV, and 500-1600 eV, respectively.
Two separate branches after the monochromator allow setting up two independent experimental chambers. The photon flux in the experimental chambers, calculated at the best resolutions achievable and with the aperture of the slits set at 10 μm, is expected to be above 1011 photons/s with linearly or circularly polarised light. In addition, a high flux grating in the 400-1600 eV range provides a higher flux, 1012 photons/s with smaller resolving power ~10.000-2000, allowing fluorescence and X-ray scattering experiments. The refocusing sections, based on plane elliptical mirrors in a Kirkpatrick-Baez scheme, will provide on the sample, a nearly free-aberration spots, whose dimensions are expected to be 200 x 310 μm2 (hor. x vert.).
Beamline history
1998/99 - Optical and mechanical design
1999/2000 - Mechanics and Optics realization
2000 June-July - Mechanics and Optics installation
2000 September - Monochromator installation
2001 March - High Energy ID operative
2001 March 16th - First beam
2001 September - 7T-2K cryostat operative (LURE & Strasbourg)
2002 January - Low Energy ID operative
2002 April - ComIXS spectrometer operative
2003 August - ARPES endstation installation (Stanford & ALS)
2003 October - Arpes endstation operative
2004 September - TwinMic microscope installed
2005 February - First images acquired by operative TwinMic on BACH
2006 March - Arrival of the new experimental chamber
2006 May - Arrival of XES300 Spectrometer (Bochum)
2006 October - New 7T-2K cryostat call for tender
2007 February - New monochromator SW operative
2007 March - Dismount of TwinMic microscope
2007 March - Building of the new two-rooms hutch
2007 April - 7T-2K cryostat order placed
2008 February - XES300 new endstation assembled
2008 June - New BACH hutch order placed
Thesis students on BACH
PhD
2002
Marco Zangrando - Czech Technical University (Prague, CZ)
Soft x-ray optics and soft x-ray spectrometer for a circularly polarised radiation source at Elettra
Supervisors: Doc.Ing. F. Černý, DrSc, Prof. F. Parmigiani
Laurea (M.Sc.)
2003
Mauro Platè - Università degli Studi di Pavia (I)
Studio delle proprietà magnetiche ed elettroniche in film di La1-xNaxMnO3 (x=0, 0.08, 0.15) con assorbimento dicroico e emissione risonante di raggi x
Study of the magnetic and electronic properties in La1-xNaxMnO3 (x=0, 0.08, 0.15) films by means of x-ray dichroic absorption and resonant emission
Supervisors: Prof. C. Azzoni, Prof. F. Parmigiani
2004
Emanuela Carleschi - Università Cattolica del Sacro Cuore Brescia (I)
Studio della struttura elettronica del sistema URu2Si2 mediante spettroscopia di fotoemissione risolta in angolo ad alta risoluzione
Study of the electronic structure of URu2Si2 system by means of high resolution angle resolved photoemission spectroscopy
Supervisors: Prof. F. Parmigiani
2005
Alessandro Nicolaou - Università degli Studi di Milano (I)
Studio strutturale del monosiliciuro di manganese cresciuto su Si(111)
Strucutral study of the managnese monosilicide grown on Si(111)
Supervisors: Prof. F. Parmigiani, Prof. A. Manini, Dr. M. Zangrando
Laurea triennale (B.Sc.)
2005
Daniele Novello - Università degli Studi di Trieste (I)
Proprietà magnetiche di nanostrutture ordinate
Magnetic properties of ordered nano-structures
Supervisors: Prof. F. Parmigiani, Dr. M. Zangrando
2006
Sarah Bassi - Università degli Studi di Trieste (I)
Contributo allo studio della struttura elettronica del MnSi
Contribution to the study of the MnSi electronic structure
Supervisors: Prof. F. Parmigiani, Dr. F. Bondino
2006
Stefano Savi - Università degli Studi di Trieste (I)
Studio della deposizione e della struttura elettronica dell'interfaccia Mn-Ge
Study of deposition and electronic structure of Mn-Ge interface
Supervisors: Prof. F. Parmigiani, Dr. F. Bondino, Dr. E. Magnano
2006
Alberto Crepaldi - Università degli Studi di Trieste (I)
Misura della superficie di Fermi di ossidi misti di cobalto mediante tecnica di fotoemissione elettronica risolta in angolo
Determination of the Fermi surface of mixed cobalt oxides by means of angle resolved photoemission
Supervisors: Prof. F. Parmigiani, Dr. M. Zacchigna
2007
Alessandro Tuniz - Università degli Studi di Trieste (I)
Misure di fotoemissione elettronica risonante su cristalli di cobaltite [Bi2Ba2O4]RS [CoO2]2
Resonant photoemission measurements on cobaltite crystals [Bi2Ba2O4]RS [CoO2]2
Supervisors: Prof. F. Parmigiani, Dott.ssa E. Carleschi
