Piri Keşif Aracı

1

Improvements to the Leake Neutron Detector I

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

J.W. Leake , T. Lowe , R.S. Mason

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

The use of cadmium as the shield in the wide-energy range spherical neutron detector developed by Leake in 1966–1968 is now causing problems that necessitate its replacement. The overestimation of the measured neutron dose equivalent in the energy region around 5 keV has long been a problem. This has led to a rethink of the design in which the resonance absorption properties of materials has been studied in an attempt to reduce the sensitivity around 5 keV (relative to 10 MeV) and also to increase the thermal neutron sensitivity thus giving a better overall ambient dose equivalent, H*(10), response.

DOI: 10.1016/j.nima.2003.11.040

Cilt: 519
Sayı: 3
Sayfa: 636-646
ISSN: 0168-9002

2

0

Başyazılar

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

Alex Dragt , Jon Orloff

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Ek Bilgiler

Kaydet

DOI: 10.1016/j.nima.2003.11.110

Cilt: 519
Sayı: 1-2
Sayfa: vii-0
ISSN: 0168-9002

3

Author Index

Dergi Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Ek Bilgiler

Kaydet

DOI: 10.1016/S0168-9002(04)00169-X

Cilt: 519
Sayı: 3
Sayfa: 695-704
ISSN: 0168-9002

4

Calculation of focussing quality of the electrostatic mirror objective free of the third-order spherical aberration

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

S.B. Bimurzaev , G.S. Serikbaeva , E.M. Yakushev

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

The formulas for the coefficients of spherical aberration of axisymmetrical electrostatic electron mirror have been obtained. The technique of excluding from the integrand of high-order derivatives of the potential axial distribution in mirror systems is given. The conditions of elimination of spherical aberration in a three-electrode axisymmetrical mirror consisting of coaxial cylinders of equal diameter are found. Using a method of direct numerical calculations of the exact equations of trajectories, the fifth-order spherical aberration coefficient of a mirror objective was calculated and its limiting resolution was estimated. The calculations show that the resolution of the electrostatic mirror objective under consideration is not worse than that of the best objectives with magnetic lenses.

DOI: 10.1016/j.nima.2003.11.122

Cilt: 519
Sayı: 1-2
Sayfa: 70-75
ISSN: 0168-9002

5

Aberration integrals for the low-voltage foil corrector

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

R.H. van Aken , M. Lenc , J.E. Barth

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

Foil aberration correctors make use of a transparent foil to correct for the spherical and chromatic aberration of electron lenses. The low-voltage foil corrector is a novel type, in which the electrons are retarded to almost 0eV at the foil. For designing a system with this corrector, analytical expressions for the aberrations are required. Such aberration integrals allow combinations of the corrector with other lenses to be calculated, even if the fields overlap. Also many different configurations can be calculated within a reasonable time. Most existing aberration integrals for foil correctors are not suitable because of an integration by parts that had been applied to them, such to obtain expressions without the fourth derivative of the axial potential. This simplification is not allowed when the electron energy approaches zero and is not necessary nowadays because the fourth derivative can be calculated accurately. Additionally, for a characterization of the corrector independent of the probe forming system, the aberration coefficients are less suitable and the geometrical and chromatic slope aberrations must be derived. In this paper, integrals have been obtained that describe correctly the spherical and chromatic aberration correction for the low voltage foil corrector. A program for the numerical calculation of the electrostatic potential can use these integrals to calculate the Cs,Cc and the slope aberrations. The results show that the low-voltage foil corrector can correct for both the spherical and chromatic aberration simultaneously.

DOI: 10.1016/j.nima.2003.11.157

Cilt: 519
Sayı: 1-2
Sayfa: 205-215
ISSN: 0168-9002

6

Design and analysis of beam separator magnets for third generation aberration compensated PEEMs

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

Y.K. Wu , D.S. Robin , E. Forest , R. Schlueter , S. Anders , J. Feng , H. Padmore , D.H. Wei

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

A state of the art X-ray photoemission electron microscope (PEEM2) is operational at the Advanced Light Source at a resolution of typically 50nm for a range of chemical and magnetic surface studies. A new microscope, PEEM3, is under development with an aim of achieving a resolution of 5nm and more than an order of magnitude increase in transmission at the nominal resolution of PEEM2. The resolution and flux improvement is realized by providing geometric and chromatic aberration compensations in the system using an electron mirror and a beam separator magnet. The nearly aberration-free design of the beam separator is critical to the performance of third generation PEEMs. In this paper, we present the optics design model, optimal operation parameters, analyses of aberration impact, as well as the mechanical alignment tolerance for PEEM3 separator prototypes. In particular, we emphasize the importance of a new semi-analytical approach to design complex charged particle optics using the truncated power series algebra. Because of its ability to compute high-order aberrations, this approach allows systematic and comprehensive analyses of any charged particle optics systems with analytical electric and magnetic fields.

DOI: 10.1016/j.nima.2003.11.160

Cilt: 519
Sayı: 1-2
Sayfa: 230-241
ISSN: 0168-9002

7

Inside front cover (Editorial Board)

Dergi Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Ek Bilgiler

Kaydet

DOI: 10.1016/S0168-9002(04)00013-0

Cilt: 518
Sayı: 3
Sayfa: IFC-0
ISSN: 0168-9002

8

Committees

Konferans Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Ek Bilgiler

Kaydet

DOI: 10.1016/j.nima.2003.10.006

Cilt: 518
Sayı: 1-2
Sayfa: ix-0
ISSN: 0168-9002

9

Performances of the CsI(Tl) detector element of the GLAST calorimeter

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

D. Bédérède , E. Bougamont , Ph. Bourgeois , F.X. Gentit , Y. Piret , G. Tauzin

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

The CsI(Tl) Detector Element (CDE) is the unit of detection of the calorimeter subsystem of the Large Area Telescope (LAT) of the GLAST satellite (IEEE Nuclear Science Symposium, 2002), which will be launched in September 2006. The LAT consists of 4×4 identical towers, each one including a strip silicon tracker on the top and a CsI(Tl) calorimeter on the bottom. A segmented plastic scintillator anticoincidence detector surrounds the 16 towers. The calorimeter modules, 8 layers of 12 CDEs each, have a hodoscopes shape to allow the measurement of the gamma-ray direction.

DOI: 10.1016/j.nima.2003.10.011

Cilt: 518
Sayı: 1-2
Sayfa: 15-18
ISSN: 0168-9002

10

First results of the cosmic rays test of the RPC of the ATLAS muon spectrometer at LHC

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

M. Alviggi , V. Canale , M. Caprio , G. Carlino , R. de Asmundis , M. Della Pietra , D. della Volpe , P. Iengo , S. Patricelli , G. Sekhniaidze

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

The trigger for the Barrel Muon Spectrometer of the ATLAS experiment at LHC will be given by means of Resistive Plate Chambers working in avalanche mode. Before being mounted on the experimental apparatus each RPC chamber will undergo detailed quality control tests. A dedicated cosmic rays test station with good tracking resolution is operational in Naples University and INFN laboratory. All working parameters of RPCs are monitored and measured. Moreover, the uniformity of the efficiency on the whole surface is measured. A brief description of the test station and results for the first 148 Units will be presented.

DOI: 10.1016/j.nima.2003.10.029

Cilt: 518
Sayı: 1-2
Sayfa: 79-81
ISSN: 0168-9002

11

Large-scale production of Monitored Drift Tube chambers for the ATLAS muon spectrometer

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

F. Bauer , S. Horvat , O. Kortner , H. Kroha , A. Manz , S. Mohrdieck , R. Richter , V. Zhuravlov

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

Precision drift tube chambers with a sense wire positioning accuracy of better than 20μm are under construction for the ATLAS muon spectrometer. 70% of the 88 large chambers for the outermost layer of the central part of the spectrometer have been assembled. Measurements during chamber construction of the positions of the sense wires and of the sensors for the optical alignment monitoring system demonstrate that the requirements for the mechanical precision of the chambers are fulfilled.

DOI: 10.1016/j.nima.2003.10.026

Cilt: 518
Sayı: 1-2
Sayfa: 69-72
ISSN: 0168-9002

12

The Silicon Tracker of the AMS02 experiment

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

C. Cecchi

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

After the successful test flight in 1998, the AMS experiment has been redesigned to improve its performances for future operation on the ISS. The Silicon Tracker is the central detector of the AMS-02 magnetic spectrometer. Eight planes of double-sided microstrip detectors embedded in a magnetic field of ∼0.8T allow for an accurate 3D reconstruction of particles trajectories and their rigidity measurement up to several TVs. The tracker is made of ∼6.4m2 of silicon with a single point resolution of 10(30)μm in the bending (not bending) coordinate. The description of the tracker system and its performance will be presented.

DOI: 10.1016/j.nima.2003.10.045

Cilt: 518
Sayı: 1-2
Sayfa: 145-146
ISSN: 0168-9002

13

The superconducting magnet system of the alpha magnetic spectrometer AMS-02

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

B. Blau , S.M. Harrison , H. Hofer , S.R. Milward , G. Kaiser , John S.H. Ross , S.C.C. Ting , J. Ulbricht

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

The Alpha Magnetic Spectrometer AMS-02 is a particle physics detector designed to search for antimatter, dark matter and the origin of cosmic rays in space. The detector will be installed on the International Space Station in 2005.

DOI: 10.1016/j.nima.2003.10.043

Cilt: 518
Sayı: 1-2
Sayfa: 139-142
ISSN: 0168-9002

14

Parallel Ionization Multiplier (PIM): application of a new concept of gaseous structure to tracking detectors

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

L. Luquin , R. Dallier , P. Laloux , M. Leguay , P. Leray , S. Lupone , V. Métivier , E. Morteau , J. Samarati , N. Servagent , D. Thers , G. Charpak , P. Coulon , M. Meynadier

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

A new amplifying structure has been developed for beta imaging detectors: the Parallel Ionization Multiplier (PIM). PIM is made of a thin sandwich of two metallic micromeshes separated by a new laser machined insulating spacer. This structure allows high gain (105) with a good efficiency and a two-dimensional spatial resolution below 50 μm without strong discharge limitation. The capabilities of the PIM are now investigated in order to be used by high-energy physics experiments. A prototype of a tracking detector for charged particles using the PIM structure will be described. Thanks to the very small avalanche extension, the use of a highly segmented anode is possible. This detector would support high rate running conditions of hadron experiment.

DOI: 10.1016/j.nima.2003.10.042

Cilt: 518
Sayı: 1-2
Sayfa: 135-138
ISSN: 0168-9002

15

Commissioning and first tests of the MAGIC telescope

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

C. Baixeras , D. Bastieri , C. Bigongiari , O. Blanch , G. Blanchot , R. Bock , T. Bretz , A. Chilingarian , J.A. Coarasa , E. Colombo , J.C. Contreras , D. Corti , J. Cortina , C. Domingo , E. Domingo , D. Ferenc , E. Fernández , J. Flix , W. Wittek

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

Major Atmospheric Gamma Imaging Cherenkov telescope is starting its operations with a set of engineering runs to tune the telescope subsystem elements to be ready for the first physics campaign. Many technical improvements have been developed and implemented in several elements of the telescope to reach the lowest energy threshold ever obtained by an Imaging Atmospheric Cherenkov Telescope. A general description of the telescope is presented. The commissioning of the telescopes elements is described and the expected performances are reviewed with the final detector set-up.

DOI: 10.1016/j.nima.2003.10.057

Cilt: 518
Sayı: 1-2
Sayfa: 188-192
ISSN: 0168-9002

16

Geometric anti-spring vertical accelerometers for seismic monitoring

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

Alessandro Bertolini , Nicolò Beverini , Giancarlo Cella , Riccardo DeSalvo , Francesco Fidecaro , Mario Francesconi , Duccio Simonetti

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

A new low-frequency, very-low noise, vertical accelerometer is presented. The sensor has been designed to be part of an array of few hundred such devices to be used to predict local gravity fluctuations. These fluctuations, acting on the mirrors of gravitational wave interferometers, are a fundamental source of noise that can only be subtracted from the recorded signal. The motion of a 36g mass supported by loaded springs is monitored by a high-resolution capacitance sensor; a feedback force actuator keeps the mass in the equilibrium position. The feedback signal is proportional to the acceleration in the frequency range 0– 150Hz. The accelerometer spectral sensitivity is better than 10−9m/Hz in the same band, with a dynamic range exceeding 150dB.

DOI: 10.1016/j.nima.2003.10.069

Cilt: 518
Sayı: 1-2
Sayfa: 233-235
ISSN: 0168-9002

17

Interferometric adaptive optics system for laser noise reduction in virgo

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

S. Avino , F. Barone , E. Calloni , R. De Rosa , L. Di Fiore , L. Milano , K. Quipiani

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

The first adaptive optics system for laser beam geometrical fluctuations correction, based on interferometric detection of aberrations, is presented. The bandwidth of the resulting feed-back is of several hundreds Hz and the residual fluctuations, measured on the error signal, are better than what can be obtained by typical Shack–Hartmann technique, encouraging for use in long baseline interferometers for GW detection.

DOI: 10.1016/j.nima.2003.10.067

Cilt: 518
Sayı: 1-2
Sayfa: 226-227
ISSN: 0168-9002

18

Proposal for lower frequency companions for the advanced LIGO Gravitational Wave Interferometric Detectors

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

Gianni Conforto , Riccardo DeSalvo

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

Recent X-ray observations of many galaxies, combined with optical observations of Galactic globular clusters, provide evidence for a population of Black Holes (BH) with masses of hundreds to thousands of solar masses. These candidate intermediate-mass BHs are often found in high density stellar clusters, where dynamical braking is rapid and hence massive stars are expected to sink to the center of the clusters within a few million years. In this same timescale, heavy star binary systems are expected to undergo numerous three-body interactions, tightening them and causing massive BHs to undergo multiple coalescences. At the BH masses implied by observations, these coalescences will take place below 100 Hz. There are advances in technology that make instruments to observe these events feasible. For example, new measurements of fused silica quality factors, as well as new wide beam technologies, can drive the thermal noise of large mirrors sufficiently low to allow monitoring of these low frequency BH–BH inspirals. It is possible to suspend an additional LF interferometer in the advanced LIGO beam pipes and within the existing LIGO facilities. This additional interferometer could be operated simultaneously with the advanced LIGO ones, thus providing both matching companions for the LF Virgo GW interferometer, and suitable triggers for higher frequency merging and ring-down signals to be measured in advanced LIGO.

DOI: 10.1016/j.nima.2003.10.068

Cilt: 518
Sayı: 1-2
Sayfa: 228-232
ISSN: 0168-9002

19

Digital techniques for n/γ pulse shape discrimination and capture-gated neutron spectroscopy using liquid scintillators

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

S.D. Jastaniah , P.J. Sellin

Yıl:

2004

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

We have investigated the use of digital pulse processing techniques for n/γ pulse shape discrimination (PSD) in liquid scintillators, and the application of these techniques to a capture-gated fast neutron monitor developed using the enriched 10B-loaded liquid scintillator BC523A. The motivation for this study has been to develop computationally fast digital PSD algorithms that can be implemented in a compact portable fast neutron monitor. The PSD separation achieved with a digital pulse risetime algorithm has a Figure of Merit comparable with previously reported analogue techniques, and provides extremely sensitive fast neutron detection in the presence of a strong gamma background. The capture-gated performance of a 685 cm3 BC523A liquid scintillator cell was investigated using fast neutrons from an Am–Be source, and the application of digital pulse processing techniques to the capture-gated detection mode is discussed. The measured mean neutron capture time in BC523A was 470±80 ns which is a factor of five shorter than that reported for liquid scintillators loaded with natural boron.

DOI: 10.1016/j.nima.2003.08.178

Cilt: 517
Sayı: 1-3
Sayfa: 202-210
ISSN: 0168-9002

20

Study of counting characteristics of porous dielectric detectors of radiations

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

M.P Lorikyan

Yıl:

2003

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

Multiwire and microstrip porous detectors have been developed and investigated for DC operation. The multiwire porous detector consists of anode wires, an Al cathode and a gap between them filled with porous CsI. The microstrip porous detector consists of an insulating plate covered with metallic strips, micromesh cathode and a gap between them filled with porous CsI. For some time after being manufactured, these detectors’ performances are non-stable and they have poor spatial resolution. However, after being kept in vacuum for a certain time, they spontaneously acquire stability and spatial resolution better than 100 μm and have detection efficiencies of 100% and 70% for heavily ionizing α-particles and 5.9 keV X-rays, respectively. The MWPDD performs stably at an intensity of heavily ionizing α-particles of 711 cts/(cm2 s).

DOI: 10.1016/j.nima.2003.07.029

Cilt: 515
Sayı: 3
Sayfa: 701-717
ISSN: 0168-9002

21

Use of Si strip detectors for low-energy particles in compact geometry

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

U.C. Bergmann , H.O.U. Fynbo , O. Tengblad

Yıl:

2003

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

A potential problem with the use of large-area silicon detectors in close geometry and for low-energy charged particles is discussed. The effects of a dead layer in a commonly used double sided silicon strip detector design are investigated. Significant energy shifts and rise in detection thresholds are caused. Solutions based on the high granularity of these detectors and an event-by-event analysis of the dead-layer effects are offered.

DOI: 10.1016/j.nima.2003.07.016

Cilt: 515
Sayı: 3
Sayfa: 657-664
ISSN: 0168-9002

22

Aging measurements with the Gas Electron Multiplier (GEM)

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

M.C. Altunbas , K. Dehmelt , S. Kappler , B. Ketzer , L. Ropelewski , F. Sauli , F. Simon

Yıl:

2003

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

Continuing previous aging measurements with detectors based on the Gas Electron Multiplier (GEM), we investigated a 31×31cm2 triple-GEM detector, as used in the small area tracking of the COMPASS experiment at CERN. With a detector identical to those installed in the experiment, long-term high-rate exposures to 8.9keV X-ray radiation were performed to study its aging properties. In standard operation conditions, with Ar/CO2 (70:30) gas filling and operated at an effective gain of 8.5×103, no change in gain and energy resolution is observed after collecting a total charge of 7mC/mm2, corresponding to seven years of normal operation.

DOI: 10.1016/j.nima.2003.09.006

Cilt: 515
Sayı: 1-2
Sayfa: 249-254
ISSN: 0168-9002

23

Performance evaluation of an Active Pixel Sensor Test Structure for space science applications

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

H.C. Mapson-Menard , C.M. Castelli , C.J. Eyles , M.L. Prydderch , N.J. Waltham

Yıl:

2003

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

An Active Pixel Sensor Test Structure, commissioned by the Rutherford Appleton Laboratory CCD Technology Group and designed by the Microelectronics Design Group, is being tested and evaluated by the University of Birmingham. The Test Structure includes four 16×16 pixel arrays, each array featuring a different 25 μm pixel design: Photogate, QuadruDot, n-type diffusion [Diode(ndps)] and p-type diffusion [Diode(pdNw)] photodiodes. Measurements are currently underway to characterize the Active Pixel Sensor performance. Initial measurements indicate pixel array gains of 2.9, 3.4, 38 and 50 electrons per ADC unit, for the QuadruDot, Photogate, Diode(ndps) and Diode(pdNw) arrays. The test-structure architecture, experimental set-up, results and conclusions are discussed, with reference to the performance benefits of this technology for future space applications.

DOI: 10.1016/j.nima.2003.08.054

Cilt: 513
Sayı: 1-2
Sayfa: 313-316
ISSN: 0168-9002

24

A study of prototype CdTe hard X- and γ-ray detectors

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

Ezio Caroli , Natalia Auricchio , Ariano Donati , Filomena Schiavone , John B Stephen , Giulio Ventura , Rui M.Curado da Silva , Paul Siffert , Makram Hage-Ali , Gianfranco Taiocchi

Yıl:

2003

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

CdTe array detectors are being investigated for use in a variety of applications, ranging from medical diagnosis to high-energy astronomy. Herein, we present a study of the spatial resolution of several prototype CdTe arrays of varying thickness as a function of energy and angle of the incident radiation. These measurements were performed at the European Synchrotron Research Facility at Grenoble, France in the first week of July 2002. The energy range employed was between 100 and 500 keV, while the detectors consisted of a set of CdTe arrays containing elements of thicknesses between 3 and 8 mm. The spatial response of the detectors was measured using single site events, while the possibility of using this type of array detector also for measuring the degree of polarisation of the radiation was investigated using multi-site interactions.

DOI: 10.1016/j.nima.2003.08.061

Cilt: 513
Sayı: 1-2
Sayfa: 350-356
ISSN: 0168-9002

25

Pixel detectors for particle physics and imaging applications

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

N. Wermes

Yıl:

2003

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

Semiconductor pixel detectors offer features for the detection of radiation which are interesting for particle physics detectors as well as for imaging e.g., in biomedical applications (radiography, autoradiography, protein crystallography) or in X-ray astronomy. At the present time hybrid pixel detectors are technologically mastered to a large extent and large-scale particle detectors are being built. Although the physical requirements are often quite different, imaging applications are emerging and interesting prototype results are available. Monolithic detectors, however, offer interesting features for both fields in future applications. The state of development of hybrid and monolithic pixel detectors, excluding CCDs, and their different suitability for particle detection and imaging, is reviewed.

DOI: 10.1016/S0168-9002(03)01905-3

Cilt: 512
Sayı: 1-2
Sayfa: 277-288
ISSN: 0168-9002

26

Performance of a 95μm pitch n-on-n silicon detector with floating strips

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yıl:

2003

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

First measurements of charge sharing and collection for a 95μm pitch n-on-n silicon sensor with floating strips are presented. These measurements were made with an analogue front-end sampling at 40MHz. Strips with a significant signal are found to be correlated with opposite polarity signals in the strips neighbouring them.

DOI: 10.1016/S0168-9002(03)01791-1

Cilt: 511
Sayı: 1-2
Sayfa: 190-194
ISSN: 0168-9002

27

Medipix2 parallel readout system

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

V. Fanti , R. Marzeddu , P. Randaccio

Yıl:

2003

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

A fast parallel readout system based on a PCI board has been developed in the framework of the Medipix collaboration.1

DOI: 10.1016/S0168-9002(03)01567-5

Cilt: 509
Sayı: 1-3
Sayfa: 171-175
ISSN: 0168-9002

28

The RPC system for the CMS experiment at the LHC

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

M. Abbrescia , A. Colaleo , G. Iaselli , F. Loddo , M. Maggi , B. Marangelli , S. Natali , S. Nuzzo , G. Pugliese , A. Ranieri , F. Romano , S. Altieri , G. Belli , G. Bruno , R. Guida , S.P. Ratti , C. Riccardi , P. Torre , P. Vitulo

Yıl:

2003

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

The CMS detector at the LHC has a redundant muon system. Two independent muon systems are used in the L1 trigger. One of them is based on wire chambers, the other on RPC detectors. Properly combining the answers of the two systems results in a highly efficient L1 trigger with high flexibility from the point of view of rate control. Simulation results show, however, that the RPC system suffers from false triggers caused by coincidence of spurious hits. System improvements, which could avoid oiling the chambers, are possible. RPCs have also proved to be very useful for muon track reconstruction.

DOI: 10.1016/S0168-9002(03)01336-6

Cilt: 508
Sayı: 1-2
Sayfa: 137-141
ISSN: 0168-9002

29

Cosmic ray test station for ATLAS RPC

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yazar(lar):

M Alviggi , V Canale , M Caprio , G Carlino , F Conventi , R de Asmundis , P Iengo , M.Della Pietra , D.Della Volpe , S Patricelli , L Romano , G Sekhniaidze

Yıl:

2003

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

We describe the facility for RPC test with cosmic rays, designed and built at the laboratory of INFN and University of Naples. Trigger and tracking systems consist of a scintillator hodoscope and two drift chambers with track reconstruction resolution of ∼400μm. Trigger is provided by the twofold coincidence of scintillators covering a surface of 1m2. Two step motors move chambers synchronously along the station for RPC scanning. Up to eight RPCs can be tested simultaneously.

DOI: 10.1016/S0168-9002(03)01291-9

Cilt: 508
Sayı: 1-2
Sayfa: 124-127
ISSN: 0168-9002

30

Performance of the RPCs for the ARGO detector operated at the YangBaJing laboratory (4300 m a.s.l.)

Araştırma Makalesi

Kaynak:

Science Direct

Dergi:

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yıl:

2003

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Yayıncı Web Sitesi Tam Metin Özet Ek Bilgiler

Kaydet

Bakelite RPCs, assembled according to the ARGO design, have been operated in the high altitude Laboratory of YBJ using dedicated electronics to pick-up the streamer signal. Here we report on the results concerning absorbed current, single counting rate, efficiency and time resolution. Environmental data concerning the operating temperature inside the ARGO experimental hall are also reported.

DOI: 10.1016/S0168-9002(03)01288-9

Cilt: 508
Sayı: 1-2
Sayfa: 110-115
ISSN: 0168-9002

Yayın Yılı

Sınırla

Doküman Türü Tümü

Disiplin Tümü

Disipline Göre İlgililik

Alt Disiplin Tümü

Konu Tümü

Dergi İsmi Tümü

Veri Tabanı Tümü

Doküman Türü

Tümü

Disiplin

Tümü

Alt Disiplin

Tümü

Konu

Tümü

Dergi İsmi

Tümü

Veri Tabanı

Tümü