Research interests:
- Convex optimization
- Compressed sensing
- Matrix completion
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Biography
Dr. Stephen Becker received his B.A. degrees in mathematics and in physics from Wesleyan University in 2005, and his Ph.D. degree in Applied & Computational Mathematics from the California Institute of Technology in 2011. Later he was a postdoctoral researcher hosted at the Laboratoire Jacques-Louis Lions in Paris 6, thanks to a fellowship by Foundation Sciences Mathématiques de Paris. In September 2011 he started working as the Goldstine Memorial Postdoc at the IBM Watson research lab. In fall 2014 he joined the department of Applied Math of University of Colorado Boulderas an Assistant Professor. His research interests are in large-scale methods for convex programming, non-convex optimization, and image processing.
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Links
PUBLICATIONS
The Forward Physics Facility at the High-Luminosity LHC
J. L. Feng; F. Kling; M. H. Reno; J. Rojo; D. Soldin et al.
Journal of Physics G: Nuclear and Particle Physics. 2023-01-20. Vol. 50, num. 3, p. 030501. DOI : 10.1088/1361-6471/ac865e. A new mechanism for increasing density peaking in tokamaks: improvement of the inward particle pinch with edge E x B shearing
J. Garcia; H. Doerk; T. Goerler; S. Abduallev; M. Abhangi et al.
Plasma Physics And Controlled Fusion. 2019-10-01. Vol. 61, num. 10, p. 104002. DOI : 10.1088/1361-6587/ab31a4. Gyrokinetic analysis and simulation of pedestals to identify the culprits for energy losses using ‘fingerprints’
M. Kotschenreuther; X. Liu; D. R. Hatch; S. Mahajan; L. Zheng et al.
Nuclear Fusion. 2019-09-01. Vol. 59, num. 9, p. 096001. DOI : 10.1088/1741-4326/ab1fa2. First principles and integrated modelling achievements towards trustful fusion power predictions for JET and ITER
J. Garcia; R. J. Dumont; J. Joly; J. Morales; L. Garzotti et al.
Nuclear Fusion. 2019-08-01. Vol. 59, num. 8, p. 086047. DOI : 10.1088/1741-4326/ab25b1. The software and hardware architecture of the real-time protection of in-vessel components in JET-ILW
V. Huber; A. Hubert; D. Kinna; G. F. Matthews; G. Sergienko et al.
Nuclear Fusion. 2019-07-01. Vol. 59, num. 7, p. 076016. DOI : 10.1088/1741-4326/ab1a79. EDGE2D-EIRENE simulations of the influence of isotope effects and anomalous transport coefficients on near scrape-off layer radial electric field
A. V. Chankin; G. Corrigan; C. F. Maggi; S. Abduallev; M. Abhangi et al.
Plasma Physics And Controlled Fusion. 2019-07-01. Vol. 61, num. 7, p. 075010. DOI : 10.1088/1361-6587/ab1629. Geodesic acoustic mode evolution in L-mode approaching the L-H transition on JET
C. Silva; J. C. Hillesheim; L. Gil; C. Hidalgo; C. F. Maggi et al.
Plasma Physics And Controlled Fusion. 2019-07-01. Vol. 61, num. 7, p. 075007. DOI : 10.1088/1361-6587/ab1e73. Combinations of single-top-quark production cross-section measurements and |f$_{LV}$V$_{tb}$| determinations at $ \sqrt{s} $ = 7 and 8 TeV with the ATLAS and CMS experiments
M. Aaboud; G. Aad; B. Abbott; D. C. Abbott; O. Abdinov et al.
Journal of High Energy Physics. 2019-05-16. p. 88. DOI : 10.1007/JHEP05(2019)088. Comparison of the structure of the plasma-facing surface and tritium accumulation in beryllium tiles from JET ILW campaigns 2011-2012 and 2013-2014
E. Pajuste; G. Kizane; I. Igaune; L. Avotina; X. Litaudon et al.
Nuclear Materials And Energy. 2019-05-01. Vol. 19, p. 131-136. DOI : 10.1016/j.nme.2019.02.011. Dynamic modelling of local fuel inventory and desorption in the whole tokamak vacuum vessel for auto-consistent plasma-wall interaction simulations
J. Denis; J. Bucalossi; G. Ciraolo; E. A. Hodille; B. Pegourie et al.
Nuclear Materials And Energy. 2019-05-01. Vol. 19, p. 550-557. DOI : 10.1016/j.nme.2019.03.019. RF sheath modeling of experimentally observed plasma surface interactions with the JET ITER-Like Antenna
A. Krivska; V. Bobkov; L. Colas; P. Dumortier; F. Durodie et al.
Nuclear Materials And Energy. 2019-05-01. Vol. 19, p. 324-329. DOI : 10.1016/j.nme.2019.03.009. Approximate analytic expressions using Stokes model for tokamak polarimetry and their range of validity
F. P. Orsitto; S. E. Segre; S. Abduallev; M. Abhangi; P. Abreu et al.
Plasma Physics And Controlled Fusion. 2019-05-01. Vol. 61, num. 5, p. 055008. DOI : 10.1088/1361-6587/ab09c2. Recurrence Plots for Dynamic Analysis of Type-I ELMs at JET With a Carbon Wall
B. Cannas; A. Fanni; A. Murari; F. Pisano; S. Abduallev et al.
Ieee Transactions On Plasma Science. 2019-04-01. Vol. 47, num. 4, p. 1871-1877. DOI : 10.1109/TPS.2019.2901313. Determination of isotope ratio in the divertor of JET-ILW by high-resolution H alpha spectroscopy: H-D experiment and implications for D-T experiment
V. S. Neverov; A. B. Kukushkin; U. Kruezi; M. F. Stamp; H. Weisen et al.
Nuclear Fusion. 2019-04-01. Vol. 59, num. 4, p. 046011. DOI : 10.1088/1741-4326/ab0000. Analysis of deposited layers with deuterium and impurity elements on samples from the divertor of JET with ITER-like wall
P. Strom; P. Petersson; M. Rubel; E. Fortuna-Zalesna; A. Widdowson et al.
Journal Of Nuclear Materials. 2019-04-01. Vol. 516, p. 202-213. DOI : 10.1016/j.jnucmat.2018.11.027. LSST: From Science Drivers to Reference Design and Anticipated Data Products
Z. Ivezic; S. M. Kahn; J. A. Tyson; B. Abel; E. Acosta et al.
Astrophysical Journal. 2019-03-10. Vol. 873, num. 2, p. 111. DOI : 10.3847/1538-4357/ab042c. Analysis of the outer divertor hot spot activity in the protection video camera recordings at JET
A. Drenik; S. Brezinsek; P. Carvalho; V. Huber; N. Osterman et al.
Fusion Engineering And Design. 2019-02-01. Vol. 139, p. 115-123. DOI : 10.1016/j.fusengdes.2018.12.079. Impact of ICRF on the scrape-off layer and on plasma wall interactions: From present experiments to fusion reactor
V. Bobkov; D. Aguiam; R. Bilato; S. Brezinsek; L. Colas et al.
Nuclear Materials And Energy. 2019-01-01. Vol. 18, p. 131-140. DOI : 10.1016/j.nme.2018.11.017. Determination of tungsten sources in the JET-ILW divertor by spectroscopic imaging in the presence of a strong plasma continuum
A. Huber; S. Brezinsek; A. Kirschner; P. Strom; G. Sergienko et al.
Nuclear Materials And Energy. 2019-01-01. Vol. 18, p. 118-124. DOI : 10.1016/j.nme.2018.12.009. Modelling of tungsten erosion and deposition in the divertor of JET-ILW in comparison to experimental findings
A. Kirschner; S. Brezinsek; A. Huber; A. Meigs; G. Sergienko et al.
Nuclear Materials And Energy. 2019-01-01. Vol. 18, p. 239-244. DOI : 10.1016/j.nme.2019.01.004. An assessment of nitrogen concentrations from spectroscopic measurements in the JET and ASDEX upgrade divertor
S. S. Henderson; M. Bernert; S. Brezinsek; M. Carr; M. Cavedon et al.
Nuclear Materials And Energy. 2019-01-01. Vol. 18, p. 147-152. DOI : 10.1016/j.nme.2018.12.012. Material migration and fuel retention studies during the JET carbon divertor campaigns
J. P. Coad; M. Rubel; J. Likonen; N. Bekris; S. Brezinsek et al.
Fusion Engineering And Design. 2019-01-01. Vol. 138, p. 78-108. DOI : 10.1016/j.fusengdes.2018.10.002. A locked mode indicator for disruption prediction on JET and ASDEX upgrade
G. Sias; B. Cannas; A. Fanni; A. Murari; A. Pau et al.
Fusion Engineering And Design. 2019-01-01. Vol. 138, p. 254-266. DOI : 10.1016/j.fusengdes.2018.11.021. Tritium distributions on W-coated divertor tiles used in the third JET ITER-like wall campaign
Y. Hatano; S. E. Lee; J. Likonen; S. Koivuranta; M. Hara et al.
Nuclear Materials And Energy. 2019-01-01. Vol. 18, p. 258-261. DOI : 10.1016/j.nme.2019.01.001. Thermal desorption spectrometry of beryllium plasma facing tiles exposed in the JET tokamak (vol 133, pg 135, 2018)
A. Baron-Wiechec; K. Heinol; J. Likonen; E. Alve; N. Catarino et al.
Fusion Engineering And Design. 2018-12-01. Vol. 137, p. 48-48. DOI : 10.1016/j.fusengdes.2018.08.007. Identification of BeO and BeOxDy in melted zones of the JET Be limiter tiles: Raman study using comparison with laboratory samples
M. Kumar; C. Makepeace; C. Pardanaud; Y. Ferro; E. Hodille et al.
Nuclear Materials And Energy. 2018-12-01. Vol. 17, p. 295-301. DOI : 10.1016/j.nme.2018.11.008. On the role of finite grid extent in SOLPS-ITER edge plasma simulations for JET H-mode discharges with metallic wall
S. Wiesen; S. Brezinsek; X. Bonnin; E. Delabie; L. Frassinetti et al.
Nuclear Materials And Energy. 2018-12-01. Vol. 17, p. 174-181. DOI : 10.1016/j.nme.2018.10.013. Heat flux analysis of Type-I ELM impact on a sloped, protruding surface in the JET bulk tungsten divertor
J. Gaspar; J. W. Coenen; Y. Corre; R. Dejarnac; M. Firdaouss et al.
Nuclear Materials And Energy. 2018-12-01. Vol. 17, p. 182-187. DOI : 10.1016/j.nme.2018.10.009. Plasma-wall interaction on the divertor tiles of JET ITER-like wall from the viewpoint of micro/nanoscopic observations
M. Tokitani; M. Miyamoto; S. Masuzaki; R. Sakamoto; Y. Oya et al.
Fusion Engineering And Design. 2018-11-01. Vol. 136, p. 199-204. DOI : 10.1016/j.fusengdes.2018.01.051. Dust generation in tokamaks: Overview of beryllium and tungsten dust characterisation in JET with the ITER-like wall
M. Rubel; A. Widdowson; J. Grzonka; E. Fortuna-Zalesna; S. Moon et al.
Fusion Engineering And Design. 2018-11-01. Vol. 136, p. 579-586. DOI : 10.1016/j.fusengdes.2018.03.027. Generation of a plasma neutron source for Monte Carlo neutron transport calculations in the tokamak JET
Z. Stancar; M. Gorelenkova; S. Conroy; J. Eriksson; J. Buchanan et al.
Fusion Engineering And Design. 2018-11-01. Vol. 136, p. 1047-1051. DOI : 10.1016/j.fusengdes.2018.04.065. Assessment of the strength of kinetic effects of parallel electron transport in the SOL and divertor of JET high radiative H-mode plasmas using EDGE2D-EIRENE and KIPP codes
A. V. Chankin; G. Corrigan; A. E. Jaervinen; S. Abduallev; M. Abhangi et al.
Plasma Physics And Controlled Fusion. 2018-11-01. Vol. 60, num. 11, p. 115011. DOI : 10.1088/1361-6587/aae0a0. Preparation for commissioning of materials detritiation facility at Culham Science Centre
M. Kresina; C. Decanis; M. Newman; C. Clements; I. Wilson et al.
Fusion Engineering And Design. 2018-11-01. Vol. 136, p. 1391-1395. DOI : 10.1016/j.fusengdes.2018.05.019. Determination of 2D poloidal maps of the intrinsic W density for transport studies in JET-ILW
M. Sertoli; J. Flanagan; M. Maslov; C. Maggi; I. Coffey et al.
Review Of Scientific Instruments. 2018-11-01. Vol. 89, num. 11, p. 113501. DOI : 10.1063/1.5046562. Shutdown dose rate measurements after the 2016 Deuterium-Deuterium campaign at JET
N. Fonnesu; R. Villari; S. Loreti; P. Batistoni; A. Klix et al.
Fusion Engineering And Design. 2018-11-01. Vol. 136, p. 1348-1353. DOI : 10.1016/j.fusengdes.2018.05.006. Precision measurement of the structure of the CMS inner tracking system using nuclear interactions
A. M. Sirunyan; A. Tumasyan; W. Adam; F. Ambrogi; E. Asilar et al.
Journal of Instrumentation. 2018-10-29. Vol. 13, num. 10, p. P10034-P10034. DOI : 10.1088/1748-0221/13/10/P10034. Neutron emission spectroscopy of D plasmas at JET with a compact liquid scintillating neutron spectrometer
L. Giacomelli; F. Belli; F. Binda; S. W. Conroy; J. Eriksson et al.
Review Of Scientific Instruments. 2018-10-01. Vol. 89, num. 10, p. 10I113. DOI : 10.1063/1.5038549. TLD calibration for neutron fluence measurements at JET fusion facility
B. Obryk; R. Villari; P. Batistoni; A. Colangeli; P. De Felice et al.
Nuclear Instruments & Methods In Physics Research Section A-Accelerators Spectrometers Detectors And Associated Equipment. 2018-10-01. Vol. 904, p. 202-213. DOI : 10.1016/j.nima.2018.07.050.
