Specifications
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Since BACH employs two different undulators for different energy ranges, the user must select properly the undulator to work with. Important Note: the two undulators cannot be used simultaneously!!! When one of them is in use (gap below 100 mm) the other must be at the maximum gap (100 mm) and zero phase and zero tapering. If both gaps are below 100 mm a beam dump will occur and all beamlines will loose the beam!
High Energy Undulator
| Type | Undulator |
|---|---|
| Available Polarization | Linear horizontal, Linear vertical, Elliptical, Circular |
| Variable Polarization | Yes |
| Source Divergence Sigma | X = 0.5 [urad], Y = 0.1 [urad] |
| Source Size Sigma | X = 240 [um], Y = 50 [um] |
| Energy Range | 175 - 1650 [eV] |
| Number Of Periods | 44 |
| Period | 48.36 [mm] |
Low Energy Undulator
| Type | Undulator |
|---|---|
| Available Polarization | Linear horizontal, Linear vertical, Elliptical, Circular |
| Variable Polarization | Yes |
| Source Divergence Sigma | X = 0.5 [urad], Y = 0.1 [urad] |
| Source Size Sigma | X = 240 [um], Y = 50 [um] |
| Energy Range | 22 - 600 [eV] |
| Total Power | 200 [W] |
| Number Of Periods | 27 |
| Period | 77.36 [mm] |
| 8.1 (High Energy) | From 175 eV-1650 eV |
First harmonic:175 eV-730 eV LH: 177 eV-746 eV (gap19-gap50mm) LV: ~367-780 (gap19-gap50mm) CP: ~290-770 (gap19-gap50mm) |
2.0 GeV |
|
First harmonic:247 eV-1030 eV LH: ~247 eV-1074 eV (gap19-gap50mm) LV: ~528-1100 eV (gap19-gap40mm) CP: ~418-1119 eV (gap19-gap50mm) |
2.4 GeV | ||
| 8.2 (Low Energy) | From 35/42 eV to more than 600 eV |
First harmonic (highest flux):35* eV-440 eV *The lower Limit is dependent on the polarization and it is actually limited to 35 eV by the monochromator. LH: 16-20 eV (estimated)-140 eV LV: 43 eV-325 eV Circ: 30 eV-270 eV |
2.0 GeV |
|
First harmonic (highest flux):42 eV-620 eV *The lower Limit is dependent on the polarization. LH: 30 eV (estimated)-200 eV LV: 61 eV-470 eV Circ: 44 eV-385 eV |
2.4 GeV |
Last Updated on Tuesday, 28 May 2019 17:39
