Dr. Stefan Janssen
Head - User Office and Guest House
Paul Scherrer Institut
Forschungsstrasse 111
5232 Villigen PSI
Switzerland
Forschungsstrasse 111
5232 Villigen PSI
Switzerland
Telephone
Email
CV
Since 2010 | Head - PSI Guest House |
Since 2004 | Head - PSI User Office |
Since 2004 | Staff member and group leader NUM division, PSI |
1999-2004 | Scientific staff member Laboratory for Neutron Scattering, PSI & ETHZ, spectroscopy group, responsible scientist for the time-of-flight spectrometer FOCUS at SINQ/PSI |
1994-1999 | Scientific staff member University of Saarbrücken (DE), Physical Chemistry, in charge for building and operating the time-of-flight spectrometer FOCUS at SINQ/PSI |
1991-1994 |
Ph.D. thesis, Institut für Festkörperforschung IFF, Forschungszentrum Jülich and RWTH Aachen, DE |
1985-1991 | studies of physics at RWTH Aachen, DE |
Organisation of Conferences and Workshops
since 2016 | European User Office Meetings |
since 2009 | Joint User Meetings at PSI |
since 2004 | SLS User Meetings |
since 2001 | SINQ User Meetings |
2004-2016 | Organizing committee of the PSI summer school on condensed matter research |
1999 | Young Scientst Panel, Group "Soft Condensed Matter", European Conference on Neutron Scattering, Budapest |
Committees and Memberships
2018-2020 | Member OECD Global Science Forum Working Group "Optimising the operation and use of national research infrastructures" |
Since 2018 | Member PSI "Personalkommission" |
Since 2017 | Board member and PSI representative "Verein Studentisches Wohnen - Region Brugg/Windisch" |
2015-2017 | Evaluation and review group: proposal selection and time allocation processes at European Southern Observatory ESO |
2001-2009 | Scientific secretary and board member of the Swiss Neutron Scattering Society |
Since 2001 | Scientific secretary of the SINQ Scientific Advisory Committee |
Since 2001 | Swiss Physical Society SPG/SPS, CH |
Since 1995 | Swiss Neutron Scattering Society SGN/SNSS, CH |
1991-2010 | German Physical Society, DPG, DE |
Selected Publications
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Janssen S, Schwahn D, Springer T
Mean-field Ising crossover and the critical exponents, and for a polymer blend: D-PB/PS studied by small-angle neutron scattering
Physical Review Letters. 1992; 68(21): 3180-3183. https://doi.org/10.1103/PhysRevLett.68.3180
DORA PSI -
Meier G, Schwahn D, Mortensen K, Janssen S
On the crossover from ising to mean-field behaviour in compatible binary-polymer blends
Europhysics Letters. 1993; 22(8): 577-588. https://doi.org/10.1209/0295-5075/22/8/004
DORA PSI -
Mortensen K, Schwahn D, Janssen S
Pressure-induced melting of micellar crystal
Physical Review Letters. 1993; 71(11): 1728-1731. https://doi.org/10.1103/PhysRevLett.71.1728
DORA PSI -
Schwahn D, Mortensen K, Janssen S
Critical neutron scattering in a polymer blend above and below the critical point of demixing: Critical exponents and amplitude ratios
Physical Review Letters. 1994; 73(10): 1452-1455. https://doi.org/10.1103/PhysRevLett.73.1452
DORA PSI -
Janssen S, Schwahn D, Springer T, Mortensen K
Coil and Melt Compressibility of Polymer Blends Studied by SANS and pVT Experiments
Macromolecules. 1995; 28(7): 2555-2560. https://doi.org/10.1021/ma00111a059
DORA PSI -
Mesot J, Janssen S, Holitzner L, Hempelmann R
Focus: project of a space and time focussing time-of-flight spectrometer for cold neutrons at the spallation source SINQ of the Paul Scherrer Institute
Journal of Neutron Research. 1996; 3(4): 293-310. https://doi.org/10.1080/10238169608200202
DORA PSI -
Mesot J, Janssen S, Holitzner L, Hempelmann R
FOCUS: Time-of-Flight spectrometer for cold neutrons at SINQ
Journal of Neutron Research. 1996; 3.
DORA PSI -
Stuhr U, Striffler T, Wipf H, Natter H, Wettmann B, Janssen S, et al.
An investigation of hydrogen diffusion in nanocrystalline Pd by neutron spectroscopy
Journal of Alloys and Compounds. 1997; 253-254: 393-396. https://doi.org/10.1016/S0925-8388(96)03062-9
DORA PSI -
Ceretti M, Janssen S, McMorrow D, Radaelli P, Steigenberger U
ECNS '99 - Young Scientists Forum
Physica B: Condensed Matter. 2000; 276-278: 45-51. https://doi.org/10.1016/S0921-4526(99)01528-8
DORA PSI -
Rubio Temprano D, Mesot J, Janssen S, Conder K, Furrer A, Mutka H, et al.
Large isotope effect on the pseudogap in the high-temperature superconductor HoBa2Cu4O8
Physical Review Letters. 2000; 84(9): 1990-1993. https://doi.org/10.1103/PhysRevLett.84.1990
DORA PSI -
Basler R, Tregenna-Piggott PLW, Andres H, Dobe C, Güdel H-U, Janssen S, et al.
Magnetic excitations of CsMn(SO4)2·12D2O, measured by inelastic neutron scattering
Journal of the American Chemical Society. 2001; 123(14): 3377-3378. https://doi.org/10.1021/ja003801a
DORA PSI -
Magazù S, Villari V, Faraone A, Maisano G, Janssen S
Effect of the monomer structure on the dynamics of semidilute polyalkylmethacrylate solutions: a quasielastic light and neutron scattering investigation
Journal of Chemical Physics. 2002; 116(1): 427-435. https://doi.org/10.1063/1.1421355
DORA PSI -
Strässle T, Janssen S, Juranyi F, Furrer A, Moze O, Pecharsky AO, et al.
Inelastic neutron scattering study of the intra-lanthanide alloys ErxPr1-x (x=0.6,0.8)
Physical Review B. 2003; 68(13): 134411 (6 pp.). https://doi.org/10.1103/PhysRevB.68.134411
DORA PSI -
Strässle T, Juranyi F, Schneider M, Janssen S, Furrer A, Krämer KW, et al.
Origin of higher order magnetic exchange: evidence for local dimer exchange striction in CsMn0.28Mg0.72Br3 probed by inelastic neutron scattering
Physical Review Letters. 2004; 92(25): 257202 (4 pp.). https://doi.org/10.1103/PhysRevLett.92.257202
DORA PSI -
Staub U, Mulders AM, Zaharko O, Janssen S, Nakamura T, Lovesey SW
Orbital dynamics of the 4f shell in DyB2C2
Physical Review Letters. 2005; 94(3): 036408 (4 pp.). https://doi.org/10.1103/PhysRevLett.94.036408
DORA PSI -
Dahlborg U, Besser M, Calvo-Dahlborg M, Janssen S, Juranyi F, Kramer MJ, et al.
Diffusion of Cu in AlCu alloys of different composition by quasielastic neutron scattering
Journal of Non-Crystalline Solids. 2007; 353(32-40): 3295-3299. https://doi.org/10.1016/j.jnoncrysol.2007.05.074
DORA PSI -
Gutberlet T, Janssen S
Where the users are and what the users do: a survey on NMI3 users
Neutron News. 2014; 25(1): 43-46. https://doi.org/10.1080/10448632.2014.870805
DORA PSI