Beamline 10.0.1
Photoemission of Highly Correlated Materials;
High-Resolution Atomic, Molecular, and Optical Physics
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Operational |
Now |
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Source characteristics |
10-cm-period undulator (U10) |
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Energy range |
17-340 eV |
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Monochromator |
SGM (gratings: 380, 925, 2100 lines/mm) |
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Calculated and measured flux (1.9 GeV, 400 mA) |
Up to 1013 photons/s/0.01%BW |
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Resolving power (E/DE) |
> 10,000 obtained, slit-width selectable |
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Endstations |
High energy resolution spectrometer (HERS) |
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Endstation |
High energy resolution spectrometer (HERS) |
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Characteristics |
Designed for very high resolution and angle-resolved photoemission spectroscopy at cryogenic temperatures. The electron energy analyzer rotates 120° about the incoming beam. |
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Angular resolution |
±0.15° |
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Detectors |
Scienta SES-200 hemispherical electron energy analyzer with angular mode |
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Spot size at sample |
150 (h) x less than 100 (v) µm depending on exit slit setting |
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Samples |
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Format |
UHV-compatible solids |
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Preparation |
Sample manipulator with five degrees of freedom and a temperature range of 12-450 K, standard surface-science preparation and characterization equipment |
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Scientific applications |
Studies of highly correlated electron systems |
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Experimental techniques |
Angle-resolved photoemission from solids |
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Local contact |
Name: Xingjiang Zhou |
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Spokesperson |
Name: Zhi Xun Shen |
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Endstation |
Electron spin polarization (ESP) |
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Characteristics |
Simultaneous spin-analysis of all electron lines in the time-of-flight spectrum with a high signal-to-noise ratio |
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Detectors |
Three time-or-flight spectrometers (TOFs) mounted at different angles in a vacuum chamber, two with retarding-field Mott polarimeters |
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Spot size at sample |
1.5 (h) x 1.5 (v) mm |
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Samples |
Gas cell |
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Sample environment |
Differential pumping permits gas pressures of up to 10-5 Torr |
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Scientific applications |
Measurements of electron spin polarization in free atoms, molecules, and clusters |
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Local contact |
Name: John Bozek |
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Spokesperson |
Name: Nora Berrah |
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Endstation |
High-resolution atomic and molecular electron spectrometer (HiRAMES) |
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Characteristics |
The electron spectrometer uses a gas cell on the beam axis to form the interaction region between the sample and the photon beam. The analyzer rotates from 0° to 90° relative to the photon beam, permitting angle-resolved measurements. |
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Detectors |
Scienta SES-200 electron energy analyzer |
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Spot size at sample |
0.4 (h) x 0.1 - 0.5 (v) mm depending on exit slit setting |
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Samples |
Gas cell, oven |
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Sample environment |
Windowless differential pumping pemits gas pressures of up to 10-5 Torr |
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Special notes |
Vented gas cabinets are available for hazardous samples |
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Experimental techniques |
High-resolution atomic and molecular electron spectroscopy |
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Local contact |
Name: John Bozek |
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Spokesperson |
Name: Nora Berrah |
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Endstation |
Ion-photon beamline (IPB) |
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Characteristics |
A positively or negatively charged ion beam from an ion accelerator is merged with the photon beam (counter propagating) for approximately 0.5 m. An analyzing magnet disperses the ion beam based on charge state following the interaction region |
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Spot size at sample |
1.5 (h) x 1.5 (v) mm |
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Samples |
Beams of singly or multiply charged positive and negative ions |
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Sample environment |
Ion beam target under ultrahigh vacuum conditions |
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Scientific applications |
Photionization of ions: cross-section and excitation spectrum measurements |
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Local contact |
Name: John Bozek |
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Spokesperson |
Name: Ronald Phaneuf Name: Nora Berrah |
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