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This type of polycapillary optics enables focussing of X-radiation. According to application particular parameters of the optics can be optimised. It is possible to reach small spot sizes or high intensities on the sample surface. An increase of the working distance between optics exit and the sample surface leads to larger spot sizes.

Specification

Focussing polycapillary system for XRF and XPS applications




Polycapillary large lens

Polycapillary mini lens

Polycapillary micro lens

Source - entrance distance f1 [mm]

> 40

> 40

> 30

Length L [mm]

150 - 300

50 - 300

40 - 60

Exit - focus distance f2 [mm]

> 40

> 10

5 - 25

Entrance size Din [mm]

> 5

> 4

> 2

Maximal size Dmax [mm]

< 16

7 - 9

4 - 5

Exit size Dout [mm]

> 5

> 2

> 1

Capture angle ฮฆ [rad]

0.05 - 0.2

0.04 - 0.15

0.05 - 0.1

Energy range [keV]

1 - 30

3 - 30

3 - 30

Optimal source size [ยตm]

> 50

30 - 1000

30 - 50

Focal spot size [ยตm]

> 200

30 - 600

10 - 100

Intensity gain

500 - 4000

1500 - 20000

1000 - 7000

Applications

XRF, XRD

ยตXRF, ยตXRD, ยตXPS and iMOXS-SEM

ยตXRF, ยตXRD and ยตXPS
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