V. Pugatch
Max Planck Society
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Publication
Featured researches published by V. Pugatch.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2003
C. Bauer; M. Bräuer; T. Glebe; W. Hofmann; T. Jagla; K.T. Knöpfle; M. A. Pleier; V. Pugatch; M. Schmelling; B. Schwingenheuer; F. G. Sciacca; U. Trunk; M Zavertiaev; I. Abt; M. Dressel; I. Kisel; S. Masciocchi; T. Perschke; M. Sang; S. Schaller
Abstract The Vertex Detector System (VDS) of the HERA-B experiment is a forward microvertex detector integrated into the HERA proton storage ring at DESY. Double-sided silicon microstrip detectors mounted in Roman pots are operated at typically 1 cm distance from the beam in a LHC-like high radiation environment. This paper presents results from the commissioning of the VDS that show its performance to meet the specifications.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1996
K. Riechmann; K.T. Knöpfle; V. Pugatch
Abstract We report on the radiation damage to silicon detectors at 25°C and 10°C induced by 190 MeV positively charged pions and 21 MeV protons. The deduced damage parameters and annealing time constants characterize the change of the diode leakage currents and full depletion voltages as a function of temperature and fluences. The results are relevant for the optimisation of the operating parameters of the HERA-B silicon vertex detector system.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2000
C. Bauer; M. Bräuer; T. Glebe; W. Hofmann; T. Jagla; K.T. Knöpfle; V. Pugatch; M. Schmelling; B. Schwingenheuer; E. Sexauer; L. Seybold; U. Trunk; R. Wanke; I. Abt; M. Dressel; S. Masciocchi; B. Moshous; T. Perschke; K. Riechmann; M. Sang; S. Schaller; W. Wagner; M. Merk; M Mevius; A. van den Brink
Abstract The HERA-B experiment is a forward magnetic spectrometer with good particle identification for hadrons and leptons designed to study violation of CP symmetry in the neutral B meson system. The silicon vertex detector operates in a high-rate environment similar to the ones expected at LHC. In this paper we report on our R&D on strip detector design, frontend ASICs, mechanical and thermal engineering, low-mass RF shielding of the HERA proton beam and on the status of our reconstruction software. First experiences with last years installation are discussed.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2000
C. Bauer; M. Bräuer; T. Glebe; W. Hofmann; T. Jagla; F. Klefenz; K.T. Knöpfle; V. Pugatch; M. Schmelling; B. Schwingenheuer; E. Sexauer; U. Trunk; R. Wanke; F. Zurheide; I. Abt; M. Dressel; I. Kisel; S. Masciocchi; B. Moshous; T. Perschke; M. Sang; S. Schaller; W. Wagner
Abstract The HERA-B experiment is being built to measure CP violation in the B-system using internal targets at the HERA proton storage ring at DESY. This paper presents an overview of its vertex detector which – apart from an additional superlayer – is realized by a system of 20 Roman pots containing seven superlayers of double-sided silicon microstrip detectors that are operated at 10 mm distance from the proton beam in a high-radiation environment.
Nuovo Cimento Della Societa Italiana Di Fisica A-nuclei Particles and Fields | 2016
V. Pugatch; I. Abt; C. Bauer; M. Bräuer; M. Dressel; T. Glebe; W. Hofmann; K.T. Knöpfle; S. Masciocchi; B. Moshous; T. Perschke; K. Riechmann; S. Schaller; M. Schmelling; B. Schwingenheuer; E. Sexauer; U. Trunk; R. Wanke; W. Wagner; F. Zurheide
SummaryThis paper presents results of a non-uniform irradiation of a single-sided ac-coupledp-on-n siliconstrip detector integrated ona HERA-B detector module. The fluences received by different areas of the detector wafer ranged from less than2 × 1013 MIP/cm2 to a maximum of 2.7 × 1014 MIP/cm2 which allowed a systematic study of the detector performance both in the originaln-type and type-inverted regime as well as in the transition region. Charge collection efficiency, noise, leakage current and full depletion voltage were determined as a function of strip number,i.e. fluence. Full functionality of the whole detector area has been established.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2001
I. Abt; C. Bauer; M. Bräuer; M. Dressel; T. Glebe; T. Jagla; I. Kisel; K.T. Knöpfle; S. Masciocchi; T. Perschke; V. Pugatch; M. Sang; S. Schaller; M. Schmelling; B. Schwingenheuer; F. G. Sciacca; E. Sexauer; U. Trunk; W. Wagner; R. Wanke
Abstract We report on investigations of shape and size of the clusters on the silicon detectors of the HERA-B vertex detector. The data taken during the commissioning run of 1999 are compared to predictions of model calculations.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2002
C. Bauer; T. Glebe; K.T. Knöpfle; V. Pugatch; B. Schwingenheuer; I. Abt; M. Dressel; S. Masciocchi; T. Perschke; S. Schaller
Abstract Irradiation studies of double-sided silicon strip-detectors for the HERA-B experiment have been performed using a setup at a 21 MeV proton beam. A novel method of fluence monitoring has been implemented. The study presented here gives results of a non-uniform irradiation of two HERA-B detector modules built with double-sided detectors made of oxygenated as well as non-oxygenated wafers. The maximum exposed fluence corresponds to about 3×10 14 MIP / cm 2 . The characterization of the detectors was done with a laser and a 106 Ru source. In regions of low-radiation dose, signal over noise ratios of 22 and 16 were measured for n- and p-side, respectively. In the region of maximum fluence, S/N values of ≈17 and ≈15 were obtained at a bias voltage of 450 V for n- and p-strips, respectively. Our measurements establish for both detector types full functionality at fluences varying by two orders of magnitude. Standard and oxygenated detectors do not show any significant difference.
nuclear science symposium and medical imaging conference | 1999
S. Masciocchi; I. Abt; C. Bauer; M. Briuer; M. Dressel; T. Glebe; W. Hofmann; I. Kisell; K.T. Knöpfle; B. Moshous; T. Perschke; V. Pugatch; M. Sang; S. Schaller; M. Schmelling; B. Schwingenheuer; E. Sexauer; U. Trunk; W. Wagner; R. Wanke; F. Zurheide
The design of the vertex detector of the HERA-B experiment at DESY is reviewed, and its components are described. The silicon microstrip detectors were optimized for radiation hardness: results from irradiation tests, reproducing the challenging situation in the experiment, are presented. Since spring 1999, much of the system has been installed and is operational. The detector performance and results from track and vertex reconstruction are presented.
Nuclear Science Symposium Conference Record, 2004 IEEE | 2005
B. Adeva; M. Agari; C. Bauer; D. Baumeister; A. Bay; R.P. Bernhard; R. Bernet; J. Blouw; B. Carron; Y. Ermoline; D. Esperante; R. Frei; J. Gassner; W. Hofmann; S. Jimenez-Otero; K.T. Knöpfle; S. Kostner; F. Lehner; S. Löchner; C. Lois; M. Needham; A. Perron; V. Pugatch; M. Schmelling; B. Schwingenheuer; M. Siegler; O. Steinkamp; U. Straumann; Minh Tâm Tran; P. Vazques
LHCb is one of the experiments of the Large Hadron Collider at CERN, dedicated to B-physics and CP-violation measurements. To fully exploit the physics potential, a good tracking performance with high efficiency in a high particle density environment close to the beam pipe is required. Silicon strip detectors with large read-out pitch and long strips will be used for the LHCb inner tracker after the magnet and the trigger tracker station in front of the magnet. We report here about the design of the silicon tracker, test beam results and the electrical tests foreseen during module production.
NUCLEAR PHYSICS AT STORAGE RINGS: Fourth International Conference - STORI99 | 2001
Yu. Vassiliev; V. Aushev; K. Ehret; M. Funcke; S. I. Sever; Yu. Pavlenko; V. Pugatch; S. Spratte; M. Symalla; N.M. Tkatch; D. Wegener
The HERA-B internal target consists out of eight target ribbons arranged around the beam. Each target can be moved in radial direction independently in sub-micron steps allowing to compensate relative beam shifts and to steer for the desired interaction rate. The experimental constraints require a stable interaction rate equally distributed over all inserted targets. The actual equalization is based on a measurement of charge originated from the beam-target interaction. The system shows a good linearity with the interaction rate and allows a reasonable distribution of the interaction rate among several wires. To cross check the performance of the multi wire steering the reconstructed tracks and primary vertices in the silicon vertex detector have been used.