logo
English (United Kingdom)Italian - Italy


Poly and Mono-Crystalline Synthetic Diamond Detectors PDF Stampa E-mail

Versione in italiano non disponibile

 

Diamond is intrinsically an insulating material, So its electric resistivity is very high and practically  to current can flow spontaneously under applied electric fields also high, as of the order of more then 20 kV/cm. To induce electrical current under the action of an applied field it is necessary to allow the diamond to be crossed by ionizing particles, which can create along their path pairs of electrons and holes which can flow to anode and cathode respectively, giving rise to an electric pulse for each bombarding particle. The realization of diamond particle detector can be limited by the fact that diamond shows a non-negligible leakage of electrons or holes during their flow to electrodes. This leakage is caused by the intrinsic defects of the diamond crystals and it gives rise to reductions of the output electric pulses.Figura_Diamond

After a long investigation and various tests done in previous years, a suitable model of the electrical  conduction of a polycrystalline synthetic CVD diamond under bombardment of ionizing particles  has been developed. The same model has been then applied to mono-crystalline CVD synthetic diamonds to deduce the much less value of the crystalline defect density in these diamonds, concluding that the mismatch between silicon backing and diamond crystal parameters is the main cause for crystal defects. We can conclude (see Activity Report pag. 82) that hopes for good spectroscopy detectors made of diamond lay on good technology for production of single crystal diamond films, that is diamond films grown on diamond itself as backing.

 

RESEARCH TEAM

S. Albergo, V. Bellini, S. Costa, F. Mammoliti, R. Potenza, C. Sutera, A. Tricomi, C. Tuvè

 

 

Ultimo aggiornamento Venerdì 18 Dicembre 2009 15:23
 

cinap

Segui UniCT su

 

mail_zimbra

banner_didattica

Risorse per il Territorio


Copyright © 2009 Dipartimento di Fisica e Astronomia.Tutti i diritti riservati.
Joomla! è un software libero rilasciato sotto licenza GNU/GPL.
Web Editor: Salvatore Costa Webmaster: Rita Ricceri

Si consiglia ie8_logo o Mozilla Firefoxfirefox-logo_small