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@MASTERSTHESIS{Neubueser:152330,
author = {Neubueser, Coralie},
title = {{I}mpact of {I}rradiations by {P}rotons with different
{E}nergies on {S}ilicon {S}ensors},
issn = {1435-8085},
school = {University of Hamburg},
type = {MS},
address = {Hamburg},
publisher = {DESY},
reportid = {DESY-2013-00180, DESY-THESIS-2013-021},
series = {DESY-THESIS},
pages = {125},
year = {2013},
note = {University of Hamburg, Masterarbeit, 2013},
abstract = {In the frame of the CMS tracker upgrade campaign the
radiation damage of oxygen- rich n-type silicon pad diodes
induced by 23 MeV and 23 GeV protons was investigated. The
diodes were manufactured by Hamamatsu Photonics. After
irradiation with 1 MeV neutron equivalent fluences between 1
× $10^11$ cm−2 and 1.5 × $10^15$ cm−2, the sensors
were electrically characterized by means of
capacitance-voltage (CV) and current-voltage (IV)
measurements. Current pulses recorded by the Transient
Current Technique (TCT) and Charge Collection Efficiency
(CCE) measurements show a dependence of the bulk damage on
the proton energy.At a fluence of Φeq ≈ 3 × $10^14$
cm−2 oxygen-rich n-type diodes demonstrate clear Space
Charge Sign Inversion (SCSI) after 23 MeV proton
irradiation. This effect does not appear after the
irradiation with 23 GeV protons. Moreover, RD50 pad diodes
were irradiated with 23 MeV protons, electrically
characterized and compared to results obtained after 23 GeV
irradiations. Our previous observation on the energy
dependence of the radiation damage could be confirmed. In
order to get a deeper understanding of the differences of
the radiation induced defects, the Deep Level Transient
Spectroscopy (DLTS) and Thermally Stimulated Current
Technique (TSC) were utilized. Defects with impact on the
space charge could be identified and characterized and it
was possible to find some hints for the reason of the SCSI
after 23 MeV proton irradiation. Moreover, a dependence on
the oxygen concentration of the sensors could be observed.},
keywords = {Unveröffentlichte Hochschulschrift (GND)},
cin = {UNI/EXP / CMS},
cid = {$I:(DE-H253)UNI_EXP-20120731$ / I:(DE-H253)CMS-20120731},
pnm = {Experiments at LHC (CMS) (POF2-512) / Facility (machine)
LHC (POF2-LHC-20130405)},
pid = {G:(DE-H253)POF2-LHC-Exp.-(CMS)-20130405 /
G:(DE-H253)POF2-LHC-20130405},
experiment = {EXP:(DE-H253)LHC-Exp-CMS-20150101 /
EXP:(DE-H253)LHC(machine)-20150101},
typ = {PUB:(DE-HGF)3 / PUB:(DE-HGF)19 / PUB:(DE-HGF)15},
doi = {10.3204/DESY-THESIS-2013-021},
url = {https://bib-pubdb1.desy.de/record/152330},
}