The aim of this paper is to present the design, the fabrication and the first experimental tests of neutrons focussing for our fabricated phase zone plates. Two different diffractive optical elements will be presented in the article. One is a 5 mm zone plate with a resolution of 400 nm and the other is a matrix (30 x 30) different Zone Plates, each one 300 mum in diameter, with an outermost zone width of 1 micron. A 4.8 mum thick natural nickel was used as phase shifter. This translates in High Aspect Ratios of similar to12 and similar to5, respectively, for these two devices. A series of test measurements carried out on a monochromatic neutrons beam have successfully demonstrated the ability of zone plates in focussing neutrons, thus opening a wide range of possible applications.
Zone plate for thermal neutron focusing: design, fabrication and first experimental tests
PETRILLO, Caterina;SACCHETTI, Francesco;
2004
Abstract
The aim of this paper is to present the design, the fabrication and the first experimental tests of neutrons focussing for our fabricated phase zone plates. Two different diffractive optical elements will be presented in the article. One is a 5 mm zone plate with a resolution of 400 nm and the other is a matrix (30 x 30) different Zone Plates, each one 300 mum in diameter, with an outermost zone width of 1 micron. A 4.8 mum thick natural nickel was used as phase shifter. This translates in High Aspect Ratios of similar to12 and similar to5, respectively, for these two devices. A series of test measurements carried out on a monochromatic neutrons beam have successfully demonstrated the ability of zone plates in focussing neutrons, thus opening a wide range of possible applications.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
