Laser induced nano-graphite electrical contacts on synthetic polycrystalline CVD diamond for nuclear radiation detection

被引：13

作者：

Alemanno, E. ^{[1
,2
]}

Martino, M. ^{[1
,2
]}

Caricato, A. P. ^{[1
,2
]}

Corrado, M. ^{[1
,2
]}

Pinto, C. ^{[1
,2
]}

Spagnolo, S. ^{[1
,2
]}

Chiodini, G. ^{[1
]}

Perrino, R. ^{[1
]}

Fiore, G. ^{[1
]}

机构：

[1] Ist Nazl Fis Nucl, I-73100 Lecce, Italy

[2] Univ Salento, Dept Math & Phys E. De Giorgi, I-73100 Lecce, Italy

来源：

关键词：

Diamond detectors; Graphitic contacts; Metal-less contacts; FILMS; GRAPHITIZATION;

D O I：

10.1016/j.diamond.2013.06.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We created a radiation detection device from a plate of high quality polycrystalline CVD diamond, fabricating nano-graphite electrical contacts on both diamond surfaces, by front and back irradiation with a 193 nm ArF excimer laser. We measured the electrode electrical resistance and evaluated a graphite resistivity of about 10(-5) Omega . m. The ohmic nature of the contact graphite/diamond is established measuring the current-voltage characteristic that it is described by a linear behavior up to 90 V, by a Space Charge Limited (SCL) regime above 100 V and below 300 V, and by a Trap Filled Space Charge Limited (TFSCL) regime above 300 V. Finally, we investigated the device response in counting mode to a Co-60 gamma-rays source and to a 120 GeV proton beam proving its capability to work as a fast nuclear radiation detector. (c) 2013 Elsevier B.V. All rights reserved.

引用

页码：32 / 35

页数：4

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