Thomas G. O'Neill
Argonne National Laboratory
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Featured researches published by Thomas G. O'Neill.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2002
N. Akopov; E. C. Aschenauer; K. Bailey; S. Bernreuther; N. Bianchi; G. P. Capitani; P. Carter; E. Cisbani; R. De Leo; E. De Sanctis; D. De Schepper; V. Djordjadze; B. W. Filippone; S. Frullani; F. Garibaldi; J.-O. Hansen; B. Hommez; M. Iodice; H. E. Jackson; Peter Jung; R. Kaiser; J. Kanesaka; R.S. Kowalczyk; L. Lagamba; Axel Maas; V. Muccifora; E. Nappi; K. Negodaeva; W.-D. Nowak; T. O'Connor
Abstract The construction and use of a dual radiator Ring Imaging Cherenkov (RICH) detector is described. This instrument was developed for the HERMES experiment at DESY which emphasises measurements of semi-inclusive deep-inelastic scattering. It provides particle identification for pions, kaons, and protons in the momentum range from 2 to 15 GeV , which is essential to these studies. The instrument uses two radiators, C 4 F 10 , a heavy fluorocarbon gas, and a wall of silica aerogel tiles. The use of aerogel in a RICH detector has only recently become possible with the development of clear, large, homogeneous and hydrophobic aerogel. A lightweight mirror was constructed using a newly perfected technique to make resin-coated carbon-fiber surfaces of optical quality. The photon detector consists of 1934 photomultiplier tubes (PMT) for each detector half, held in a soft steel matrix to provide shielding against the residual field of the main spectrometer magnet.
European Physical Journal C | 2001
A. Airapetian; N. Akopov; M. Amarian; J. Arrington; E. C. Aschenauer; D. De Schepper; H. E. Jackson; N.C.R. Makins; Thomas G. O'Neill; D. H. Potterveld; Yerevan Physics Inst.; Inst. Superiore di Sanita
Abstract. The influence of the nuclear medium on the production of charged hadrons in semi-inclusive deep-inelastic scattering has been studied by the HERMES experiment at DESY using a 27.5 GeV positron beam. The differential multiplicity of charged hadrons and identified charged pions from nitrogen relative to that from deuterium has been measured as a function of the virtual photon energy
Physical Review Letters | 1998
C. Bochna; B. Terburg; D. Abbott; Abdellah Ahmidouch; C. S. Armstrong; J. Arrington; K. A. Assamagan; Oliver Keith Baker; S. Barrow; D. Beatty; D. Beck; S. Beedoe; E. J. Beise; J. E. Belz; P. Bosted; E. J. Brash; H. Breuer; R. V. Cadman; L. Cardman; R. Carlini; J. Cha; N. S. Chant; C. Cothran; W. J. Cummings; S. Danagoulian; F. Duncan; James Dunne; D. Dutta; T. Eden; R. Ent
nu
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2000
E. C. Aschenauer; N. Bianchi; G. P. Capitani; P. Carter; C Casalino; Evaristo Cisbani; C. Coluzza; R. De Leo; E. De Sanctis; D. De Schepper; V Djordjadze; B. W. Filippone; S. Frullani; F. Garibaldi; J.-O. Hansen; B. Hommez; M. Iodice; H. E. Jackson; R. Kaiser; J Kanesaka; L. Lagamba; V. Muccifora; E. Nappi; W.-D. Nowak; Thomas G. O'Neill; D. H. Potterveld; D. Ryckbosch; Yasuhiro Sakemi; F Sato; A Schwind
and the fraction z of this energy transferred to the hadron. There are observed substantial reductions of the multiplicity ratio
Physical Review C | 2004
Joseph Mitchell; J. Dunne; D.J. Abbott; R. Carlini; R. Ent; D. Mack; S. A. Wood; C. Yan; C.J. Martoff; J. Reinhold; B. Zeidman; J. Arrington; K. Bailey; W.J. Cummings; H. Gao; D. F. Geesaman; J.-O. Hansen; Thomas G. O'Neill
R_M^{h}
Physical Review C | 2002
K. Garrow; David W. McKee; A. Ahmidouch; C. S. Armstrong; J. Arrington; R. Asaturyan; S. Avery; Oliver Keith Baker; D. Beck; H.P. Blok; C. W. Bochna; W. Boeglin; P. Bosted; M. Bouwhuis; H. Breuer; D. Brown; A. Bruell; R. Carlini; N. S. Chant; A. Cochran; L. Cole; S. Danagoulian; D. Day; J. Dunne; D. Dutta; R. Ent; H. Fenker; B. D. Fox; L. Gan; D. Gaskell
at low
Physical Review Letters | 2001
E. Schulte; A. Ahmidouch; C. S. Armstrong; J. Arrington; R. Asaturyan; S. Avery; Oliver Keith Baker; D. Beck; H.P. Blok; C. Bochna; W. Boeglin; P. Bosted; M. Bouwhuis; H. Breuer; D. Brown; A. Bruell; R. V. Cadman; R. Carlini; N. S. Chant; A. Cochran; L. Cole; S. Danagoulian; D. Day; James Dunne; D. Dutta; R. Ent; H. Fenker; B. D. Fox; L. Gan; H. Gao
nu
Archive | 2000
R. Ent; B. W. Filippone; N.C.R. Makins; R. Milner; Thomas G. O'Neill; David Allan Wasson
and at high z, both of which are well described by a gluon-bremsstrahlung model of hadronization. A significant difference of the
Archive | 2005
Frank Dohrmann; Derek Abbott; Abdellah Ahmidouch; P. Ambrozewicz; C. S. Armstrong; J. Arrington; K. Bailey; W.J. Cummings; H. Gao; D. F. Geesaman; Kawtar Hafidi; Jan Hansen; Howard E. Jackson; B. A. Mueller; Thomas G. O'Neill; D. H. Potterveld; Paul E. Reimer; J. Reinhold; B. Zeidman; Forschungszentrum Rossendorf
nu
Physics Letters B | 2000
K. Ackerstaff; A. Airapetian; N. Akopov; Igor Akushevich; M. Amarian; Dirk de Schepper; H. Gao; J.-O. Hansen; Harold Jackson; N.C.R. Makins; Thomas G. O'Neill; D. H. Potterveld; Desy; Desy Zeuthen
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