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Title: Recovery of CVD Diamond Detectors using Laser Double Pulses

Abstract

A 5 x 0.25 mm Chemical Vapor Deposited (CVD) diamond detector, with a voltage bias of + 250V, was excited by a 400 nm laser (3.1 eV photons) in order to study the saturation of the wafer and its associated electronics. In a first experiment, the laser beam energy was increased from a few tens of a pJ to about 100 {micro}J, and the signal from the diamond was recorded until full saturation of the detection system was achieved. Clear saturation of the detection system was observed at about 40 V, which corresponds with the expected saturation at 10% of the applied bias (250V). The results indicate that the interaction mechanism of the 3.1 eV photons in the diamond (E{sub bandgap} = 5.45 eV) is not a multi-photon process but is linked to the impurities and defects of the crystal. In a second experiment, the detector was irradiated by a saturating first laser pulse and then by a delayed laser pulse of equal or smaller amplitude with delays of 5, 10, and 20 ns. The results suggest that the diamond and associated electronics recover within 10 to 20 ns after a strong saturating pulse.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
883548
Report Number(s):
UCRL-PROC-216119
Journal ID: ISSN 1155-4339; TRN: US200615%%118
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Journal Volume: 133; Conference: Presented at: 4th International Fusion Sciences & Applications, Biarritz, France, Sep 04 - Sep 09, 2005
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AMPLITUDES; DEFECTS; DETECTION; DIAMONDS; IMPURITIES; LASERS; PHOTONS; SATURATION

Citation Formats

Dauffy, L S, Lerche, R A, Schmid, G J, Koch, J A, and Silbenagel, C. Recovery of CVD Diamond Detectors using Laser Double Pulses. United States: N. p., 2005. Web. doi:10.1051/jp4:2006133191.
Dauffy, L S, Lerche, R A, Schmid, G J, Koch, J A, & Silbenagel, C. Recovery of CVD Diamond Detectors using Laser Double Pulses. United States. https://doi.org/10.1051/jp4:2006133191
Dauffy, L S, Lerche, R A, Schmid, G J, Koch, J A, and Silbenagel, C. 2005. "Recovery of CVD Diamond Detectors using Laser Double Pulses". United States. https://doi.org/10.1051/jp4:2006133191. https://www.osti.gov/servlets/purl/883548.
@article{osti_883548,
title = {Recovery of CVD Diamond Detectors using Laser Double Pulses},
author = {Dauffy, L S and Lerche, R A and Schmid, G J and Koch, J A and Silbenagel, C},
abstractNote = {A 5 x 0.25 mm Chemical Vapor Deposited (CVD) diamond detector, with a voltage bias of + 250V, was excited by a 400 nm laser (3.1 eV photons) in order to study the saturation of the wafer and its associated electronics. In a first experiment, the laser beam energy was increased from a few tens of a pJ to about 100 {micro}J, and the signal from the diamond was recorded until full saturation of the detection system was achieved. Clear saturation of the detection system was observed at about 40 V, which corresponds with the expected saturation at 10% of the applied bias (250V). The results indicate that the interaction mechanism of the 3.1 eV photons in the diamond (E{sub bandgap} = 5.45 eV) is not a multi-photon process but is linked to the impurities and defects of the crystal. In a second experiment, the detector was irradiated by a saturating first laser pulse and then by a delayed laser pulse of equal or smaller amplitude with delays of 5, 10, and 20 ns. The results suggest that the diamond and associated electronics recover within 10 to 20 ns after a strong saturating pulse.},
doi = {10.1051/jp4:2006133191},
url = {https://www.osti.gov/biblio/883548}, journal = {},
issn = {1155-4339},
number = ,
volume = 133,
place = {United States},
year = {Tue Sep 27 00:00:00 EDT 2005},
month = {Tue Sep 27 00:00:00 EDT 2005}
}

Conference:
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