Fluctuations in Calorimetry Measurements

Amaldi, U.

doi:10.1088/0031-8949/23/4a/012

Cited by 165 publications

(62 citation statements)

References 47 publications

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“…General properties of calorimeter fluctuations are reported e.g. by Amaldi [13]. In this contribution we report on a simulation study of fluctuations as function of depth in a segmented CsI calorimeter.…”

Section: Introductionmentioning

confidence: 81%

Fluctuation studies and energy reconstruction in a segmented calorimeter

Gavler

Carlson

Conrad

2006

2006 IEEE Nuclear Science Symposium Conference Record

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Abstract-In order to better understand energy estimation of electromagnetic showers in segmented calorimeters, detailed Geant4 simulation studies of electromagnetic showers in the energy range 1-100 GeV in CsI have been performed. When sampled in layers of 1.99 cm thickness, corresponding to 1.08 radiation lengths, the energy fluctuations in the samples show distributions that vary significantly with depth. The energy distributions are similar for incident electrons and photons and were found to change systematically along the shower, varying little with the initial energy. Three probability distributions have been fitted to the data: negative binomial, log-normal and Gaussian distributions, none of which gives a good fit over the full shower length. The obtained parameterizations might be useful in the use of the maximum likelihood method for estimating the energy. Two methods for estimating the energy have also been studied. One method is based on fitting individual longitudinal shower profiles with a Γ-function, the other one corrects the measured energy for leakage by utilizing the energy deposited in the last layer. Our simulations indicate that the last-layer correction method applied to photons and electrons of 1 and 10 GeV gives about a factor of 2 improvement in the energy resolution.

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Section: Introductionmentioning

confidence: 81%

Fluctuation studies and energy reconstruction in a segmented calorimeter

Gavler

Carlson

Conrad

2006

2006 IEEE Nuclear Science Symposium Conference Record

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“…Longitudinal and transverse shower development have been discussed in many excellent review articles [1][2][3][4][5][6][7]. This article will briefly retrace classical shower theory in a pictorial way.…”

Section: Electromagnetic Showersmentioning

confidence: 99%

High-resolution electro-magnetic calorimetry with noble liquids

Schinzel

1998

Nuclear Instruments and Methods in Physics Research Section A:

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Electromagnetic calorimeters with noble liquids and their limits in resolution are discussed. The origins of "initial" current measurement in calorimetry are retraced and the performance and first results of the NA48 calorimeter (quasi-homogeneous calorimeter with longitudinal electrode structure) are presented. Results of the prototype calorimeters of KEDR (quasi-homogeneous calorimeter with transverse electrode structure) and of ATLAS (sampling calorimeter with longitudinal electrode structure), are summarized.

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“…Previous authors [27,25,28] have identied the frequency of sampling material as a critical variable in dE/dx based calorimeters. An attempt at quantifying energy mis-measurement due to sampling uctuations for Cherenkov-ber calorimeters is proposed here.…”

Section: Sampling Uctuationsmentioning

confidence: 99%

“…An attempt at quantifying energy mis-measurement due to sampling uctuations for Cherenkov-ber calorimeters is proposed here. The discussion which follows is guided by the work done by Amaldi [25] for dE/dx based calorimeters. Amaldi's arguments are briey described and, where necessary, changes are made for the Cherenkov-ber calorimetry case.…”

Section: Sampling Uctuationsmentioning

confidence: 99%

“…Here we attempt to quantitatively dene the effects of the most important detector characteristics on overall performance. Our attempts are heavily inuenced by the seminal work of a number of authors [22][23][24][25], primarily U. Amaldi [25], whose lucid explanations form a solid base for any such discussion. We therefore begin from existing and generally accepted parameterizations and make alterations based on our own understanding of the Cherenkov-ber calorimeter.…”

Section: Introductionmentioning

confidence: 99%

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On the electromagnetic energy resolution of Cherenkov-fiber calorimeters

Lundin

Contin

Dellacasa

et al. 1996

Nuclear Instruments and Methods in Physics Research Section A:

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Electromagnetic calorimeters which sample the Cherenkov radiation of shower particles in optical bers operate in a markedly dierent manner from calorimeters which rely on the dE/dx of shower particles. The well-understood physics of electromagnetic shower development is applied to the case of Cherenkov-ber calorimetry (also known as quartz ber calorimetry) and the results of systematically performed studies are considered in detail to derive an understanding of the critical parameters involved in energy measurement using such calorimeters. A quantitative parameterization of Cherenkov-ber calorimetry electromagnetic energy resolution is proposed and compared with existing experimental results.

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Fluctuations in Calorimetry Measurements

Cited by 165 publications

References 47 publications

Fluctuation studies and energy reconstruction in a segmented calorimeter

Fluctuation studies and energy reconstruction in a segmented calorimeter

High-resolution electro-magnetic calorimetry with noble liquids

On the electromagnetic energy resolution of Cherenkov-fiber calorimeters

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