pCVD diamond sensors 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 increases in the dark leakage current without beam losses 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 0.6T, for higher fields it decreases. A preliminary model is introduced to explain the observations.
@article{arxiv.0905.0403,
title = {Study of leakage currents in pCVD diamonds as function of the magnetic field},
author = {S. Müller and W. deBoer and M. Schneider and A. Sabellek and M. Schmanau and C. Rühle and T. Schneider and R. Hall-Wilton},
journal= {arXiv preprint arXiv:0905.0403},
year = {2015}
}
Comments
6 pages, 16 figures, poster at Hasselt Diamond Workshop, Mar 2009, accepted version for publication