J.A. Bakken
Princeton University
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Publication
Featured researches published by J.A. Bakken.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1989
J.A. Bakken; Luciano Barone; J.J. Blaising; T. Boehringer; B. Borgia; D. Boutigny; J.P. Burq; M. Chemarin; R. Clare; G. Coignet; P. Denes; F. De Notaristefani; M. Diemoz; C. Dionisi; H. Elmamouni; P. Extermann; S. Falciano; F. Ferroni; G. Gratta; B. Ille; P. Kaaret; Y. Karyotakis; P. F. Klok; P. Lebrun; P. Lecoq; P.J. Li; E. Longo; D. Luckey; L. Luminari; J. P. Martin
Abstract A method to calibrate the L3 electromagnetic calorimeter with cosmic muons has been tested on a matrix of 100 tapered BGO crystals. Calibration constants in the energy range of 20–30 MeV were measured at the 2% level collecting about 200 muons per crystal. The results are in agreement with the calibration constant determined using a 10 GeV electron beam.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1987
J.A. Bakken; G. Bellomi; R. Bizzarri; T. Böhringer; B. Borgia; M. Bourquin; D. Boutigny; J.P. Burq; F. Carminati; M. Chemarin; P. Denes; C. Dionisi; H. Elmamouni; P. Extermann; S. Falciano; F. Ferroni; G. Gratta; J.T. He; B. Ille; P. Kaaret; P. Klok; P. Lebrun; E. Longo; Y.S. Lu; J.P. Martin; U. Micke; R. Morand; J. Ossman; D. Perret-Gallix; E. Perrin
Abstract A prototype of the L3 electromagnetic calorimeter to be used at LEP and consisting of 100 tapered BGO crystals has been tested in an electron beam in the energy range of 2 to 50 GeV. The energy resolution and linearity of response have been measured, and are compared to predictions made with the GEANT Monte Carlo program.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1989
J.A. Bakken; Luciano Barone; J.J. Blaising; T. Boehringer; B. Borgia; D. Boutigny; J.P. Burq; M. Chemarin; R. Clare; G. Coignet; P. Denes; F. De Notaristefani; M. Diemoz; C. Dionisi; H. Elmamouni; P. Extermann; S. Falciano; F. Ferroni; G. Gratta; B. Ille; P. Kaaret; Y. Karyotakis; P. F. Klok; P. Lebrun; P. Lecoq; P.J. Li; E. Longo; D. Luckey; L. Luminari; M. Maire
Abstract A calibration study was performed on a prototype of the L3 BGO electromagnetic calorimeter. The accuracy and stability reached is a small fraction of the typical detector resolution.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1988
J.A. Bakken; Luciano Barone; J.J. Blaising; T. Boehringer; B. Borgia; D. Boutigny; J.P. Burq; M. Chemarin; R. Clare; G. Coignet; P. Denes; M. Diemoz; C. Dionisi; H. Elmamouni; P. Extermann; S. Falciano; F. Ferroni; G. Gratta; B. Ille; Y. Karyotakis; P. Klok; P. Lebrun; P. Lecoq; P.J. Li; E. Longo; D. Luckey; L. Luminari; J.P. Martin; M. Micke; U. Micke
Abstract We report on a precise measurement of the energy loss through ionization by pions in bismuth germanate performed at several values of the incident particles momentum with a prototype of the L3 electromagnetic calorimeter. The experimental results are in good agreement with theoretical predictions showing the relativistic rise modified by density effect.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1994
J.A. Bakken; Luciano Barone; A. Bay; J.J. Blaising; B. Borgia; D. Bourilkov; D. Boutigny; I.C. Brock; F.L. Linde
During 1991 two cosmic rays runs took place for the calibration of the L3 electromagnetic calorimeter. In this paper we present the results of the first high statistics cosmic ray calibration of the calorimeter in situ, including the end caps. Results show that the accuracy on the measurement of the calibration constants that can be achieved in one month of data taking is of 1.3%.
Physics Letters B | 1993
O. Adriani; M. Aguilar-Benitez; S. P. Ahlen; J. Alcaraz; A. Aloisio; G. Alverson; M. G. Alviggi; G. Ambrosi; Q. An; H. Anderhub; A.L. Anderson; V. Andreev; L. Antonov; D. Antreasyan; P. Arce; A. Arefiev; A. Atamanchuk; T. Azemoon; T. Aziz; P.V.K.S. Baba; S. Bachmann; P. Bagnaia; J.A. Bakken; L. Baksay; R.C. Ball; S. Banerjee; J. Bao; R. Barillère; Luciano Barone; A. Baschirotto
We report a measurement of R b = Γ bb Γ had from Z → qq events at LEP. View the Z → qq events are identified using a multidimensional analysis based on a neural network approach. We obtain 60% sample purity with an efficiency of 35%. Our measured value of R b is 0.222±0.003±0.007.
