Elemental mapping and microimaging by x-ray capillary optics.
Recently, many experiments have highlighted the advantage of using polycapillary optics for x-ray fluorescence studies. We have developed a special confocal scheme for micro x-ray fluorescence measurements that enables us to obtain not only elemental mapping of the sample but also simultaneously its own x-ray imaging. We have designed the prototype of a compact x-ray spectrometer characterized by a spatial resolution of less than 100 microm for fluorescence and less than 10 microm for imaging. A couple of polycapillary lenses in a confocal configuration together with a silicon drift detector allow elemental studies of extended samples (approximately 3 mm) to be performed, while a CCD camera makes it possible to record an image of the same samples with 6 microm spatial resolution, which is limited only by the pixel size of the camera. By inserting a compound refractive lens between the sample and the CCD camera, we hope to develop an x-ray microscope for more enlarged images of the samples under test.
Hampai
D
D
Istituto Nazionale di Ottica Applicata-Consiglio Nazionale delle Ricerche, Largo E. Fermi, 6, I-50125 Firenze, Italy. dariush.hampai@lnf.infn.it
Dabagov
S B
SB
Cappuccio
G
G
Longoni
A
A
Frizzi
T
T
Cibin
G
G
Guglielmotti
V
V
Sala
M
M