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CALICE Collaboration,
C. Adloff,
J. Blaha,
J. -J. Blaising,
C. Drancourt,
A. Espargilière,
R. Gaglione,
N. Geffroy,
Y. Karyotakis,
J. Prast, [......],
J. Smolik,
V. Vrba,
J. Zalesak,
B. Belhorma,
H. Ghazlane,
T. Takeshita,
S. Uozumi,
J. Sauer,
S. Weber,
C. Zeitnitz
[show abstract]
[hide abstract]
ABSTRACT: The energy resolution of a highly granular 1 m3 analogue scintillator-steel
hadronic calorimeter is studied using charged pions with energies from 10 GeV
to 80 GeV at the CERN SPS. The energy resolution for single hadrons is
determined to be approximately 58%/sqrt(E/GeV}. This resolution is improved to
approximately 45%/sqrt(E/GeV) with software compensation techniques. These
techniques take advantage of the event-by-event information about the
substructure of hadronic showers which is provided by the imaging capabilities
of the calorimeter. The energy reconstruction is improved either with
corrections based on the local energy density or by applying a single
correction factor to the event energy sum derived from a global measure of the
shower energy density. The application of the compensation algorithms to Geant4
simulations yield resolution improvements comparable to those observed for real
data.
07/2012;
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J. Aguilar,
P. Ambalathankandy,
T. Fiutowski,
M. Idzik,
Sz. Kulis,
D. Przyborowski,
K. Swientek,
A. Bamberger,
M. Köhli,
M. Lupberger, [......],
D. Haas,
M. Pohl,
R. Diener,
P. Fischer,
I. Peric,
A. Kaukher,
O. Schäfer,
H. Schröder,
R. Wurth,
A. F. Zarnecki
[show abstract]
[hide abstract]
ABSTRACT: The EUDET-project was launched to create an infrastructure for developing and
testing new and advanced detector technologies to be used at a future linear
collider. The aim was to make possible experimentation and analysis of data for
institutes, which otherwise could not be realized due to lack of resources. The
infrastructure comprised an analysis and software network, and instrumentation
infrastructures for tracking detectors as well as for calorimetry.
01/2012;
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C Adloff,
J Blaha,
J.-J Blaising,
C Drancourt,
A Espargilière,
R Gaglione,
N Geffroy,
Y Karyotakis,
J Prast,
G Vouters, [......],
N Meyer,
S Morozov,
V Morgunov,
M Reinecke,
F Sefkow,
P Smirnov,
M Terwort,
A Vargas-Trevino,
N Wattimena,
O Wendt
07/2011;
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C. Adloff,
J. Blaha,
J. -J. Blaising,
C. Drancourt,
A. Espargilière,
R. Gaglione,
N. Geffroy,
Y. Karyotakis,
J. Prast,
G. Vouters, [......],
V. Vrba,
J. Zalesak,
B. Belhorma,
H. Ghazlane,
K. Kotera,
M. Nishiyama,
T. Takeshita,
S. Tozuka,
T. Buanes,
G. Eigen
[show abstract]
[hide abstract]
ABSTRACT: The CALICE collaboration is studying the design of high performance
electromagnetic and hadronic calorimeters for future International Linear
Collider detectors. For the hadronic calorimeter, one option is a highly
granular sampling calorimeter with steel as absorber and scintillator layers as
active material. High granularity is obtained by segmenting the scintillator
into small tiles individually read out via silicon photo-multipliers (SiPM).
A prototype has been built, consisting of thirty-eight sensitive layers,
segmented into about eight thousand channels. In 2007 the prototype was exposed
to positrons and hadrons using the CERN SPS beam, covering a wide range of beam
energies and incidence angles. The challenge of cell equalization and
calibration of such a large number of channels is best validated using
electromagnetic processes.
The response of the prototype steel-scintillator calorimeter, including
linearity and uniformity, to electrons is investigated and described.
12/2010;
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The CALICE collaboration,
C Adloff,
Y Karyotakis,
J Repond,
A Brandt,
H Brown,
K De,
C Medina,
J Smith,
J Li, [......],
I Kim,
T Lee,
J Park,
J Sung,
S Itoh,
K Kotera,
M Nishiyama,
T Takeshita,
S Weber,
C Zeitnitz
[show abstract]
[hide abstract]
ABSTRACT: An analog hadron calorimeter (AHCAL) prototype of 5.3 nuclear interaction lengths thickness has been constructed by members of the CALICE Collaboration. The AHCAL prototype consists of a 38-layer sandwich structure of steel plates and highly-segmented scintillator tiles that are read out by wavelength-shifting fibers coupled to SiPMs. The signal is amplified and shaped with a custom-designed ASIC. A calibration/monitoring system based on LED light was developed to monitor the SiPM gain and to measure the full SiPM response curve in order to correct for non-linearity. Ultimately, the physics goals are the study of hadron shower shapes and testing the concept of particle flow. The technical goal consists of measuring the performance and reliability of 7608 SiPMs. The AHCAL was commissioned in test beams at DESY and CERN. The entire prototype was completed in 2007 and recorded hadron showers, electron showers and muons at different energies and incident angles in test beams at CERN and Fermilab.
Journal of Instrumentation 05/2010; 5(05):P05004. · 1.87 Impact Factor
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C. Adloff,
Y Karyotakis,
J Repond,
J Yu,
G Eigen,
Y Mikami,
N K Watson,
J A Wilson,
T Goto,
G. Mavromanolakis, [......],
B. Belhorma,
M. Belmir,
S W Nam,
I H Park,
J Yang,
J-S Chai,
J T Kim,
G-B Kim,
J Kang,
Y.-J. Kwon
J. Instrum. 5(2010),P05007. 04/2010;
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C. Adloff,
Y Karyotakis,
J Repond,
A Brandt,
H Brown,
K De,
C. Medina,
J Smith,
J Li,
M Sosebee, [......],
Ilgoo Kim,
Taeyun Lee,
Jaehong Park,
Jinho Sung,
S Itoh,
K. Kotera,
M Nishiyama,
T Takeshita,
S. Weber,
C Zeitnitz
[show abstract]
[hide abstract]
ABSTRACT: An analog hadron calorimeter (AHCAL) prototype of 5.3 nuclear interaction lengths thickness has been constructed by members of the CALICE Collaboration. The AHCAL prototype consists of a 38-layer sandwich structure of steel plates and highly-segmented scintillator tiles that are read out by wavelength-shifting fibers coupled to SiPMs. The signal is amplified and shaped with a custom-designed ASIC. A calibration/monitoring system based on LED light was developed to monitor the SiPM gain and to measure the full SiPM response curve in order to correct for non-linearity. Ultimately, the physics goals are the study of hadron shower shapes and testing the concept of particle flow. The technical goal consists of measuring the performance and reliability of 7608 SiPMs. The AHCAL was commissioned in test beams at DESY and CERN. The entire prototype was completed in 2007 and recorded hadron showers, electron showers and muons at different energies and incident angles in test beams at CERN and Fermilab. Comment: 36 pages, 32 figures
03/2010;
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[show abstract]
[hide abstract]
ABSTRACT: Using permanent sample-plot data, selected tree height and diameter functions were evaluated for their predictive abilities for major tree species in complex (multiple age, size and species cohort) stands of interior British Columbia (BC), Canada. Two sets of models were evaluated. The first set included five models for estimating height as a function of individual tree diameter, the second set also included five models for estimating height as a function of individual tree diameter and other stand-level attributes. The inclusion of the BAL index (which simultaneously indicates the relative position of a tree and stand density) into the base height–diameter models increased the accuracy of prediction for all species. On average, by including stand level attributes, root mean square values were reduced by 30.0cm. Based on the residual plots and fit statistics, these models can be recommended for estimating tree heights for major tree species in complex stands of interior BC. The model coefficients are documented for future use.
European Journal of Forest Research 03/2004; 123(1):45-51. · 1.98 Impact Factor
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I. Abt,
T. Ahmed,
S. Aid,
V. Andreev,
B. Andrieu,
R.-D. Appuhn,
C. Arnault,
M. Arpagaus,
A. Babaev,
H. Bärwolff, [......],
J. ŽáČek,
D. Zarbock,
P. Závada,
C. Zeitnitz,
Z. Zhang,
H. Ziaeepour,
M. Zimmer,
W. Zimmermann,
F. Zomer,
K. Zuber
[show abstract]
[hide abstract]
ABSTRACT: Technical aspects of the three major components of the H1 detector at
the electron-proton storage ring HERA are described. This paper covers
the detector status up to the end of 1994 when a major upgrading of some
of its elements was undertaken. A description of the other elements of
the detector and some performance figures from luminosity runs at HERA
during 1993 and 1994 are given in a paper previously published in this
journal.
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 01/1997; 386:348-396. · 1.21 Impact Factor
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E. Barrelet,
B. Andrieu,
A. Babaev,
E. Banas,
D. Bederede,
P. Biddulph,
K. Borras,
F. Brasse,
V. Brisson,
P. Burmeister, [......],
M. Sueur,
K. Thiele,
N. Tobien,
W. Tribanek,
S. Valkár,
C. Vallée,
G. Villet,
D. Wegener,
T.P. Yiou,
J. Žáček
[show abstract]
[hide abstract]
ABSTRACT: The ionization probes used for monitoring the liquid argon purity in the H1 calorimeter are described and results of their operation in tests at CERN and during the period 1992 to the end of 1998 at HERA are given. The high sensitivity of the charge measurements leads to refined charge collection models, and to the observation of a variation of the ionization yield of our electron sources with temperature.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.
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H1 Collaboration,
H1 SpaCal Group,
RD Appuhn,
C Arndt,
E Barrelet,
R Barschke,
U Bassler,
F Blouzon,
V Boudry,
F Brasse, [......],
G Villet,
K Wacker,
A Walther,
M Weber,
D Wegener,
T Wenk,
J Zacek,
A Zhokin,
P Zini,
K Zuber
-
C. Adloff,
Y. Karyotakis,
J. Repond,
J. Yu,
G. Eigen,
C.M. Hawkes,
Y. Mikami,
O. Miller,
N.K. Watson,
J.A. Wilson, [......],
B. Belhorma,
M. Belmir,
S.W. Nam,
I.H. Park,
J. Yang,
J.-S. Chai,
J.-T. Kim,
G.-B. Kim,
J. Kang,
Y.-J. Kwon
[show abstract]
[hide abstract]
ABSTRACT: A prototype silicon–tungsten electromagnetic calorimeter (ECAL) for an international linear collider (ILC) detector was installed and tested during summer and autumn 2006 at CERN. The detector had 6480 silicon pads of dimension . Data were collected with electron beams in the energy range 6–45 GeV. The analysis described in this paper focuses on electromagnetic shower reconstruction and characterises the ECAL response to electrons in terms of energy resolution and linearity. The detector is linear to within approximately the 1% level and has a relative energy resolution of . The spatial uniformity and the time stability of the ECAL are also addressed.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.
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R D Appuhn,
C Arndt,
E Barrelet,
R Barschke,
U Bassler,
F Blouzon,
V Boudry,
F Brasse,
P. Bruel,
D Bruncko, [......],
G Villet,
K Wacker,
A Walther,
M Weber,
D Wegener,
T Wenk,
J. Zcek,
A Zhokin,
P Zini,
K Zuber
-
H1 Collaboration,
I Abt,
T Ahmed,
S Aid,
V Andreev,
B Andrieu,
RD Appuhn,
C Arnault,
M Arpagaus,
A Babaev, [......],
J Zacek,
D Zarbock,
P. Zavada,
C Zeitnitz,
Z Zhang,
H Ziaeepour,
M Zimmer,
W Zimmermann,
F Zomer,
K Zuber
-
H1 Collaboration,
I Abt,
T Ahmed,
S Aid,
V Andreev,
B Andrieu,
RD Appuhn,
C Arnault,
M Arpagaus,
A Babaev, [......],
J Zacek,
D Zarbock,
P. Zavada,
C Zeitnitz,
Z Zhang,
H Ziaeepour,
M Zimmer,
W Zimmermann,
F Zomer,
K Zuber
-
H1 Collaboration,
H1 SpaCal Group,
R D Appuhn,
C Arndt,
E Barrelet,
R Barschke,
U Bassler,
V Boudry,
R Buchholz,
F Brasse, [......],
D Van den Plas,
G Villet,
K Wacker,
A Walther,
M Weber,
D Wegener,
T Wenk,
J Zacek,
A Zhokin,
K Zuber
-
H1 Collaboration,
H1 SpaCal Group,
RD Appuhn,
C Arndt,
E Barrelet,
R Barschke,
U Bassler,
T Bipp,
V Boudry,
F Brasse, [......],
D Vandenplas,
G Villet,
K Wacker,
A Walther,
M Weber,
D Wegener,
T Wenk,
J Zacek,
A Zhokin,
K Zuber
-
C. Adloff,
J. Blaha,
J J Blaising,
C. Drancourt,
A. Espargiliere,
R. Gaglione,
N. Geffroy,
Y Karyotakis,
J. Prast,
G. Vouters, [......],
P. Sicho,
J. Smolik,
V Vrba,
J Zalesak,
B. Belhorma,
H. Ghazlane,
K. Kotera,
M Nishiyama,
T Takeshita,
S. Tozuka
Red Report (2010),.
-
C. Adloff,
K. Francis,
J Repond,
J Smith,
D. Trojand,
L Xia,
E. Baldolemar,
J Li,
S.T. Park,
M Sosebee, [......],
P. Mora de Freitas,
G. Musat,
M. Reinhard,
M. Ruan,
H Videau,
M. Marcisovsky,
P. Sicho,
J Zalesak,
B. Belhorma,
H. Ghazlane
[show abstract]
[hide abstract]
ABSTRACT: Application Specific Integrated Circuits, ASICs, similar to those envisaged for the readout electronics of the central calorimeters of detectors for a future lepton collider have been exposed to high-energy electromagnetic showers. A salient feature of these calorimeters is that the readout electronics will be embedded into the calorimeter layers. In this article it is shown that interactions of shower particles in the volume of the readout electronics do not alter the noise pattern of the ASICs. No signal at or above the MIP level has been observed during the exposure. The upper limit at the 95% confidence level on the frequency of faked signals is smaller than 1x10^{-5} for a noise threshold of about 60% of a MIP. For ASICs with similar design to those which were tested, it can thus be largely excluded that the embedding of the electronics into the calorimeter layers compromises the performance of the calorimeters.
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C. Adloff,
Y Karyotakis,
J Repond,
A Brandt,
H Brown,
K De,
C. Medina,
J Smith,
J Li,
M Sosebee, [......],
I Kim,
T Lee,
J Park,
J Sung,
S Itoh,
K. Kotera,
M Nishiyama,
T Takeshita,
S. Weber,
C Zeitnitz
