کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1830031 | 1027471 | 2007 | 5 صفحه PDF | دانلود رایگان |
The silicon sensors in the layers most exposed to radiation of the present Large Hadron Collider (LHC) experiments at CERN use n-strip readout on n-type substrates (n-in-n) to exploit the better charge collection guaranteed by reading out an electron signal rather than a hole one. Arguments in favour of implementing the n-strip readout on a p-type substrate (n-in-p) can be made: the readout always happens on the junction side, before and after irradiation and the sensors do not require double-sided lithography to pattern the guard-ring structures on the backside. This has an impact in reducing the production cost and on the handling of the devices when it comes to module production. As for the n-in-n geometry, n-in-p will require strip isolation, obtained with p-stop, p-spray or a combination of the two techniques.The development of large-area devices, experiment grade with p-spray isolation is described here. A discussion of the pre-irradiation quality control requirements that takes into account the different performances of the detectors introduced by the p-spray is presented.
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 579, Issue 2, 1 September 2007, Pages 623–627