Technical Info

Quick facts

Source: conventional ALS Bending magnet.

Spatial resolution: adjustable from 0.8 x 0.8 µm2 to 7 x 7 µm2.

Energy range: 2.1-14 keV.

Resolving power (E/ΔE): 7000 at 10 keV.

Flux at 6 keV at sample: 9 x 109 ph/s.

Sample environment: air, sample cooling (fixed at 93 oK)

Detectors

• Canberra/Mirion 7-element silicon drift detector 

• Amptek FAST silicon drift detector

• 2 Ionization chambers (one to monitor the incident beam, one for transmission measurements).

Sample cooling stage

Custom LN2 cryo stage (93oK) in vacuum (10 ^-7). Samples have to be mounted on 3 mm diameter TEM grids.

Optics

A 1:1 toroidal mirror (M1) located at 14.75 m  from the source makes an image of the source onto a set of roll slits (horizontal and vertical) at 29.5 m. These slits define a virtual source which is then demagnified inside the hutch were an aluminum box contain the rest of the optics: 1) a vertically-deflecting plane-parabola collimating mirror (M2) equipped with a pair of JJ slits, 2) a Si(111) monochromator, 3) a KB pair of mirrors (M3,M4) to focus the fixed beam onto the sample.