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Study of leakage currents in PC CVD diamonds as function of the magnetic field

✍ Scribed by Müller, S. ;deBoer, W. ;Schneider, M. ;Sabellek, A. ;Schmanau, M. ;Rühle, C. ;Schneider, T. ;Hall-Wilton, R.

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
699 KB
Volume
206
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

Polycrystalline diamonds produced with the chemical vapor deposition technique (PC CVD diamonds) are regularly used as beam loss monitors in accelerators by measuring the ionization of the lost particles. In the past, these beam loss monitors showed sudden increase in the dark leakage current without beam loss and these erratic leakage currents were found to decrease, if magnetic fields were present. Here, we report on a systematic study of leakage currents inside a magnetic field. The decrease of erratic currents in a magnetic field was confirmed. On the contrary, diamonds without erratic currents showed an increase of the leakage current in a magnetic field perpendicular to the electric field for fields up to 0.6 T, for higher fields it decreases. A preliminary model is introduced to explain the observations.

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