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| Electromagnetic Variable Polarizing Undulator with Quasiperiodicity Capabilities |
| Device Length |
4.8 m |
| Undulator Period |
12.5 cm |
| First Harmonic Range |
- 250 to 2500 eV (Horizontal Linear Polarization)
- 440 to 2500 eV (Vertical Linear Polarization;)
- 400 to 2500 eV (Left and Right Circular Polarization)
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| Gap |
10.5 mm |
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| Component |
Distance from Source
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Comment |
| Mirror (M0) |
30.5 m |
Heat-sink, side bounce |
| Mirror (M1) |
31.3 m |
Heat-sink, side bounce |
| Monochromator (M2, MEG, HEG) |
39.7 m |
In-Focus VLS-PGM |
| Exit Slit |
59.7 m |
Both RSXS and ARPES |
| Mirror (M3A) |
64.3 m |
Horizontal Focusing (ARPES branch) |
| Mirror (M4A) |
65.1 m |
Vertical Focusing (ARPES branch) |
| ARPES focus |
66.3 m |
~ 30 µm x exit slit size (typically 25 µm) |
| Mirror (M3R) |
43.7 m |
Horizontal Deflecting and Focusing (RSXS branch) |
| Mirror (M4R) |
64.7 m |
Vertical Focusing (RSXS branch) |
| RSXS focus |
69.7 m |
~ 375 µm x exit slit size (typically 100 µm) |
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| Grating |
k0 (lines/mm) |
cff |
Resolving Power
(E/dE) |
Flux (photon/sec) |
Energy Range (eV) |
| HEG |
2400 |
4.2 |
50,000 |
2 x 10^10 |
250 - 2,000 |
| MEG |
1200 |
2.2 |
10,000
2,500
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2 x 10^11
2 x 10^9
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250 - 2,000
2,000 - 3,000
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| LEG (to be installed) |
400
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1.5 |
2,500 |
4 x 10^12 |
250 - 1,900 |
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