Details

Autor(en) / Beteiligte

• Baricordi, S.
• Biryukov, V. M.
• Carnera, A.
• Chesnokov, Yu. A.
• Mea, G. Della
• Guidi, V.
• Ivanov, Yu. M.
• Martinelli, G.
• Milan, E.
• Restello, S.
• Sambo, A.
• Scandale, W.
• Vomiero, A.

Titel

Low-energy-channeling surface analysis on silicon crystals designed for high-energy-channeling in accelerators

Ist Teil von

• Applied physics letters, 2005-08, Vol.87 (9)

Ort / Verlag

United States

Erscheinungsjahr

2005

Link zum Volltext

Quelle

AIP Journals Complete

Beschreibungen/Notizen

• Channeling of relativistic particles in bent Si crystals is a powerful technique for use with accelerators. Its efficiency can be found to be highly dependent on the state of the surface of the crystal steering the particles. We investigated the morphology and structure of the surface of the samples that have been used with high efficiency for channeling in accelerators. Low-energy channeling of 2MeVα particles or protons was used as a probe. We found that mechanical treatment of the samples leads to a superficial damaged layer, which is correlated to efficiency limitations of the crystal in accelerators. In contrast, chemical etching, which was used to treat the surface of the most efficient crystals, leaves a surface with superior perfection.