We introduce the electrical characterization of 2.5 mm-long graphite pillars buried in single crystal CVD diamond. A mode-locked Ti:Sapphire laser generating 5 ps pulses at the wavelength of 800 nm with a repetition rate of 1 kHz has been used to directly produce graphite columns with a diameter of about 10 m and an aspect ratio greater than 240. A pair of 12 pillars was realized within the diamond bulk starting from opposite lateral faces resulting in an interdigitated-like structure buried within the diamond volume. Tests with 2.28 MeV electrons emitted by 90Sr,Y collimated radioactive source demonstrate that the charge collected by the active volume saturates at 1.00±0.02 fC at an electric field strength evaluated as ±1.3 V/m with electrons impinging parallel to the rows. The collected charge, much lower than that expected by theoretical estimation, has been tentatively attributed to a loss of biasing due to the probable non-continuity of the graphite pillars within the sample.

Oliva, P., Salvatori, S., Conte, G., Girolami, M., Trucchi, D.M., Kononenko, T.V., et al. (2017). 3D diamond detectors with millimeter-long graphite pillared electrodes. In Proceedings SEIA 2017 (pp.1-4). IFSA Publishing.

3D diamond detectors with millimeter-long graphite pillared electrodes

P. Oliva;S. Salvatori;G. Conte;
2017-01-01

Abstract

We introduce the electrical characterization of 2.5 mm-long graphite pillars buried in single crystal CVD diamond. A mode-locked Ti:Sapphire laser generating 5 ps pulses at the wavelength of 800 nm with a repetition rate of 1 kHz has been used to directly produce graphite columns with a diameter of about 10 m and an aspect ratio greater than 240. A pair of 12 pillars was realized within the diamond bulk starting from opposite lateral faces resulting in an interdigitated-like structure buried within the diamond volume. Tests with 2.28 MeV electrons emitted by 90Sr,Y collimated radioactive source demonstrate that the charge collected by the active volume saturates at 1.00±0.02 fC at an electric field strength evaluated as ±1.3 V/m with electrons impinging parallel to the rows. The collected charge, much lower than that expected by theoretical estimation, has been tentatively attributed to a loss of biasing due to the probable non-continuity of the graphite pillars within the sample.
Oliva, P., Salvatori, S., Conte, G., Girolami, M., Trucchi, D.M., Kononenko, T.V., et al. (2017). 3D diamond detectors with millimeter-long graphite pillared electrodes. In Proceedings SEIA 2017 (pp.1-4). IFSA Publishing.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/335234
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