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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

TypeUndulator
Available PolarizationLinear horizontal, Linear vertical, Circular
Variable PolarizationYes
Source Divergence SigmaX = 0.5 [urad], Y = 0.1 [urad]
Source Size SigmaX = 240 [um], Y = 50 [um]
Energy Range185 - 1600 [eV]
Number Of Periods44
Period48.36 [mm]

Low Energy Undulator

TypeUndulator
Available PolarizationLinear horizontal, Linear vertical, Circular
Variable PolarizationYes
Source Divergence SigmaX = 0.5 [urad], Y = 0.1 [urad]
Source Size SigmaX = 240 [um], Y = 50 [um]
Energy Range22 - 600 [eV]
Total Power200 [W]
Number Of Periods27
Period77.36 [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
 
Ultima modifica il Martedì, 28 Maggio 2019 17:39