Professor Dirk van der Werf

Publications

Journal Articles

  1. et. al. Observation of the 1S–2S transition in trapped antihydrogen. Nature 541(7638), 506-510.
  2. & The role of antihydrogen formation in the radial transport of antiprotons in positron plasmas. Journal of Physics B: Atomic, Molecular and Optical Physics 49(13), 134004
  3. et. al. An improved limit on the charge of antihydrogen from stochastic acceleration. Nature 529(7586), 373-376.
  4. & Exciting positronium with a solid-state UV laser: the Doppler-broadened Lyman-αtransition. Journal of Physics B: Atomic, Molecular and Optical Physics 48(17), 175001
  5. et. al. Antiproton cloud compression in the ALPHA apparatus at CERN. Hyperfine Interactions
  6. & Advances in antihydrogen physics. Science Progress 98(1), 34-62.
  7. et. al. The ALPHA antihydrogen trapping apparatus. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 735, 319-340.
  8. & Metastable states in antihydrogen formation. Hyperfine Interactions 228(1-3), 81-83.
  9. The GBAR experiment. International Journal of Modern Physics: Conference Series 30, 1460263
  10. et. al. The Gbar project, or how does antimatter fall?. Hyperfine Interactions 228(1-3), 141-150.
  11. & Radially selective inward transport of positrons in a Penning–Malmberg trap. New Journal of Physics 16(7), 073028
  12. et. al. An experimental limit on the charge of antihydrogen. Nature Communications 5
  13. et. al. In situ electromagnetic field diagnostics with an electron plasma in a Penning–Malmberg trap. New Journal of Physics 16(1), 013037
  14. & Positron annihilation in small molecules. Journal of Physics B: Atomic, Molecular and Optical Physics 46(19), 195001
  15. Autoresonant-spectrometric determination of the residual gas composition in the ALPHA experiment apparatus. Review of Scientific Instruments 84(6), 065110
  16. et. al. Description and first application of a new technique to measure the gravitational mass of antihydrogen. Nature Communications 4, 1785
  17. Experimental and computational study of the injection of antiprotons into a positron plasma for antihydrogen production. Physics of Plasmas 20(4)
  18. & Antihydrogen in a bottle. Physics Education 48(2)-220.
  19. & Manipulation of the magnetron orbit of a positron cloud in a Penning trap. Physics of Plasmas 20(1), 012124
  20. et. al. Silicon vertex detector upgrade in the ALPHA experiment. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 732, 134-136.
  21. Resonant quantum transitions in trapped antihydrogen atoms. Nature 483(7390), 439-443.
  22. Progress towards microwave spectroscopy of trapped antihydrogen. Hyperfine Interactions 212(1-3), 81-90.
  23. Trapped antihydrogen. Hyperfine Interactions 212(1-3), 15-29.
  24. Antihydrogen detection in ALPHA. Hyperfine Interactions 212(1-3), 91-99.
  25. & Compression of positron clouds using rotating wall electric fields. Hyperfine Interactions 212(1-3), 125-132.
  26. Antihydrogen formation by autoresonant excitation of antiproton plasmas. Hyperfine Interactions 212(1-3), 61-67.
  27. & Further evidence for low-energy protonium production in vacuum. The European Physical Journal Plus 127(10)
  28. Antihydrogen annihilation reconstruction with the ALPHA silicon detector. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 684, 73-81.
  29. & The behaviour of positron clouds in the single-particle regime under the influence of rotating wall electric fields. New Journal of Physics 14(7), 075022
  30. Discriminating between antihydrogen and mirror-trapped antiprotons in a minimum-B trap. New Journal of Physics 14(1), 015010
  31. Alternative method for reconstruction of antihydrogen annihilation vertices. Hyperfine Interactions 212(1-3), 101-107.
  32. Microwave-plasma interactions studied via mode diagnostics in ALPHA. Hyperfine Interactions 212(1-3), 117-123.
  33. The ALPHA – detector: Module Production and Assembly. Journal of Instrumentation 7(01), C01051-C01051.
  34. & Compression of Positron Clouds in the Independent Particle Regime. Physical Review Letters 107(3), 033201
  35. Search for trapped antihydrogen in ALPHAThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at École de Physique, les Houches, France, 30 May – 4 June, 2010.. Canadian Journal of Physics 89(1)-16.
  36. Search for trapped antihydrogen. Physics Letters B 695(1-4), 95-104.
  37. Confinement of antihydrogen for 1,000 seconds. Nature Physics 7(7), 558-564.
  38. Antiparticle sources for antihydrogen production and trapping. Journal of Physics: Conference Series 262, 012001
  39. Autoresonant Excitation of Antiproton Plasmas. Physical Review Letters 106(2), 025002
  40. Centrifugal Separation and Equilibration Dynamics in an Electron-Antiproton Plasma. Physical Review Letters 106(14), 145001
  41. & The temperature and density dependence of positron annihilation in CO2and SF6. Journal of Physics B: Atomic, Molecular and Optical Physics 44(17), 175204
  42. et. al. Antihydrogen formation dynamics in a multipolar neutral anti-atom trap. Physics Letters B 685(2-3), 141-145.
  43. Trapped antihydrogen. Nature 468(7324), 673-676.
  44. Evaporative Cooling of Antiprotons to Cryogenic Temperatures. Physical Review Letters 105(1), 013003
  45. & Simulations of antihydrogen formation in a nested Penning trap. Journal of Physics: Conference Series 199, 012008
  46. & Magnetised positronium. Journal of Physics: Conference Series 199, 012005
  47. Antimatter transport processes. Journal of Physics: Conference Series 257, 012004
  48. Antihydrogen Physics at ALPHA/CERNThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at University of Windsor, Windsor, Ontario, Canada on 21–26 July 2008.. Canadian Journal of Physics 87(7)-797.
  49. Antiproton, positron, and electron imaging with a microchannel plate/phosphor detector. Review of Scientific Instruments 80(12), 123701
  50. Magnetic multipole induced zero-rotation frequency bounce-resonant loss in a Penning–Malmberg trap used for antihydrogen trapping. Physics of Plasmas 16(10), 100702
  51. & Simulation of the formation of antihydrogen in a nested Penning trap: effect of positron density. Journal of Physics B: Atomic, Molecular and Optical Physics 42(21), 215002
  52. et. al. Temporally Controlled Modulation of Antihydrogen Production and the Temperature Scaling of Antiproton-Positron Recombination. Physical Review Letters 101(5), 053401
  53. Production of antihydrogen at reduced magnetic field for anti-atom trapping. Journal of Physics B: Atomic, Molecular and Optical Physics 41(1), 011001
  54. & Weakly bound positron–electron pairs in a strong magnetic field. Journal of Physics B: Atomic, Molecular and Optical Physics 41(24), 245003
  55. & Antihydrogen for precision tests in physics. Contemporary Physics 49(1), 29-41.
  56. A novel antiproton radial diagnostic based on octupole induced ballistic loss. Physics of Plasmas 15(3), 032107
  57. Towards trapped antihydrogen. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 266(3), 357-362.
  58. Compression of Antiproton Clouds for Antihydrogen Trapping. Physical Review Letters 100(20)
  59. Protonium production in ATHENA. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 261(1-2), 40-43.
  60. Antimatter Plasmas in a Multipole Trap for Antihydrogen. Physical Review Letters 98(2)
  61. Search for Laser-Induced Formation of Antihydrogen Atoms. Physical Review Letters 97(21)
  62. Evidence For The Production Of Slow Antiprotonic Hydrogen In Vacuum. Physical Review Letters 97(15)
  63. & Three-body effects in positron annihilation on molecules. Journal of Physics B: Atomic, Molecular and Optical Physics 39(17)-L334.
  64. Sideband cooling of ions in a non-neutral buffer gas. Physical Review A 73(6)
  65. & Design and operation of a two-stage positron accumulator. Review of Scientific Instruments 77(6)
  66. & Oxide muonics: II. Modelling the electrical activity of hydrogen in wide-gap and high-permittivity dielectrics. Journal of Physics: Condensed Matter 18(3)-1119.
  67. Progress with cold antihydrogen. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 247(1)-137.
  68. Production of slow protonium in vacuum. Hyperfine Interactions 172(1-3)-105.
  69. Towards antihydrogen confinement with the ALPHA antihydrogen trap. Hyperfine Interactions 172(1-3)-89.
  70. & The effect of adsorbed noble gas atoms on muonium formation at the silica surface. Physica B: Condensed Matter 374-375-358.
  71. & Oxide muonics: A new compendium. Physica B: Condensed Matter 374-375-382.
  72. & A magnetic trap for antihydrogen confinement. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 566(2), 746-756.
  73. & Effects of Extreme Magnetic Quadrupole Fields on Penning Traps and the Consequences for Antihydrogen Trapping. Physical Review Letters 95(15)
  74. & New Source of Dense, Cryogenic Positron Plasmas. Physical Review Letters 95(2)
  75. Spatial Distribution of Cold Antihydrogen Formation. Physical Review Letters 94(3)

Book Chapters

  1. PRODUCTION AND STUDY OF ANTIHYDROGEN IN THE ATHENA EXPERIMENT. In Nuclear Science and Safety in Europe. -48).

Conference Contributions

  1. (2013). Electron plasmas as a diagnostic tool for hyperfine spectroscopy of antihydrogen. -133. doi:10.1063/1.4796068
  2. (2013). Electron plasmas as a diagnostic tool for hyperfine spectroscopy of antihydrogen. -133. doi:10.1063/1.4796068
  3. & (2010). Antihydrogen Physics. Presented at Proceedings of the International School of Physics "Enrico Fermi" Course CLXXIV "Physics with Many Positrons",, 189-215.IOS. doi:10.3254/978-1-60750-646-1-189
  4. (2008). Antiproton compression and radial measurements. , 96-105. doi:10.1063/1.2977860
  5. (2008). First Attempts at Antihydrogen Trapping in ALPHA. , 241-248. doi:10.1063/1.2977843
  6. (2008). Particle Physics Aspects of Antihydrogen Studies with ALPHA at CERN. , 208-220. doi:10.1063/1.2977840
  7. & (2006). Simple loss scaling laws for quadrupoles and higher-order multipoles used in antihydrogen traps.