Channeling of relativistic particles through a crystal may be useful for many applications in accelerators. It has been experimented that significant roles are played by the method used to clean the crystal surfaces that the particles beam encounters first. It is exptl. obsd. that chem. cleaning of the surfaces via etching leads to better performance than conventional mech. treated samples do. The authors investigated the phys. reasons for such a behavior through characterization of the surfaces of the crystal. They obsd. that mech. dicing causes a superficial layer rich in dislocations and lattice imperfections, extending tens of microns into the crystal, which is removed via etching. Such a disordered layer is the first portion of the crystal experienced by the incoming particles and results in a mosaicity degree that exceeds the crit. angle of relativistic particles for channeling, i.e., it acts like an amorphous layer.

Morphological and structural studies of crystals for channeling of relativistic particles.

BARICORDI, Stefano;GUIDI, Vincenzo;MALAGU', Cesare;MARTINELLI, Giuliano;STEFANCICH, Marco;
2005

Abstract

Channeling of relativistic particles through a crystal may be useful for many applications in accelerators. It has been experimented that significant roles are played by the method used to clean the crystal surfaces that the particles beam encounters first. It is exptl. obsd. that chem. cleaning of the surfaces via etching leads to better performance than conventional mech. treated samples do. The authors investigated the phys. reasons for such a behavior through characterization of the surfaces of the crystal. They obsd. that mech. dicing causes a superficial layer rich in dislocations and lattice imperfections, extending tens of microns into the crystal, which is removed via etching. Such a disordered layer is the first portion of the crystal experienced by the incoming particles and results in a mosaicity degree that exceeds the crit. angle of relativistic particles for channeling, i.e., it acts like an amorphous layer.
2005
00078328
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/522849
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact