000 03520nam a22004695i 4500
001 978-3-319-01177-6
003 DE-He213
005 20140220082508.0
007 cr nn 008mamaa
008 131105s2014 gw | s |||| 0|eng d
020 _a9783319011776
_9978-3-319-01177-6
024 7 _a10.1007/978-3-319-01177-6
_2doi
050 4 _aQC770-798
072 7 _aPHP
_2bicssc
072 7 _aSCI051000
_2bisacsh
082 0 4 _a539.73
_223
100 1 _aMertens, Susanne.
_eauthor.
245 1 0 _aBackground Processes in the Electrostatic Spectrometers of the KATRIN Experiment
_h[electronic resource] /
_cby Susanne Mertens.
264 1 _aCham :
_bSpringer International Publishing :
_bImprint: Springer,
_c2014.
300 _aXVI, 196 p. 116 illus., 108 illus. in color.
_bonline resource.
336 _atext
_btxt
_2rdacontent
337 _acomputer
_bc
_2rdamedia
338 _aonline resource
_bcr
_2rdacarrier
347 _atext file
_bPDF
_2rda
490 1 _aSpringer Theses, Recognizing Outstanding Ph.D. Research,
_x2190-5053
505 0 _aAbstract -- Introduction and objectives of the thesis -- Neutrino Physics -- The KATRIN experiment -- Monte Carlo simulation package -- Muon induced background -- Background due to Penning traps -- Background due to stored electrons following nuclear decays -- Background due to stored electrons following nuclear decays -- Conclusion -- Optimization of the spectrometer transmission properties with the air coil system -- Comparison of transmission measurements at the pre-spectrometer with Kassiopeia simulations -- Alternative methods of removing stored electrons.
520 _aNeutrinos continue to be the most mysterious and, arguably, the most fascinating particles of the Standard Model as their intrinsic properties such as absolute mass scale and CP properties are unknown. The open question of the absolute neutrino mass scale will be addressed with unprecedented accuracy by the Karlsruhe Tritium Neutrino (KATRIN) experiment, currently under construction.  This thesis focusses on the spectrometer part of KATRIN and background processes therein. Various background sources such as small Penning traps, as well as nuclear decays from single radon atoms are fully characterized here for the first time. Most importantly, however, it was possible to reduce the background in the spectrometer by more than five orders of magnitude by eliminating Penning traps and by developing a completely new background reduction method by stochastically heating trapped electrons using electron cyclotron resonance (ECR).  The work beautifully demonstrates that the obstacles and challenges in measuring the absolute mass scale of neutrinos can be met successfully if novel experimental tools (ECR) and novel computing methods (KASSIOPEIA) are combined to allow almost background-free tritium ß-spectroscopy.
650 0 _aPhysics.
650 0 _aParticle acceleration.
650 1 4 _aPhysics.
650 2 4 _aParticle Acceleration and Detection, Beam Physics.
650 2 4 _aAstrophysics and Astroparticles.
650 2 4 _aNumerical and Computational Physics.
650 2 4 _aMeasurement Science and Instrumentation.
710 2 _aSpringerLink (Online service)
773 0 _tSpringer eBooks
776 0 8 _iPrinted edition:
_z9783319011769
830 0 _aSpringer Theses, Recognizing Outstanding Ph.D. Research,
_x2190-5053
856 4 0 _uhttp://dx.doi.org/10.1007/978-3-319-01177-6
912 _aZDB-2-PHA
999 _c92601
_d92601