CHEP 06

Session

Event Processing Applications

EPA

13 Feb 2006, 14:00

Tata Institute of Fundamental Research

371. Geant4 in production: status and developments

Dr John Apostolakis (CERN)

13/02/2006, 14:00

Event processing applications

oral presentation

Geant4 has become an established tool, in production for the majority of LHC experiments during the past two years, and in use in many other HEP experiments and for applications in medical, space and other fields. Improvements and extensions to its capabilities continue, while its physics modeling are refined and results are accumulating for its validation for a variety uses. An overview...

420. Update On the Status of the FLUKA Monte Carlo Transport Code

Lawrence S. Pinsky (University of Houston)

13/02/2006, 14:18

Event processing applications

oral presentation

The FLUKA Monte Carlo transport code is a well-known simulation tool in High Energy Physics. FLUKA is a dynamic tool in the sense that it is being continually updated and improved by the authors. We review the progress achieved since the last CHEP Conference on the physics models, and some recent applications. From the point of view of hadronic physics, most of the effort is still in...

85. GEANT4E: Error propagation for track reconstruction inside the GEANT4 framework

Mr Pedro Arce (Cent.de Investigac.Energeticas Medioambientales y Tecnol. (CIEMAT))

13/02/2006, 14:36

Event processing applications

oral presentation

GEANT4e is a package of the GEANT4 Toolkit that allows to propagate a track with its error parameters. It uses the standard GEANT4 code to propagate the track and for the track propagation it makes an helix approximation (with the step controlled by the user) using the same equations as GEANT3/GEANE. We present here a first working prototype of the GEANT4e package and compare its results...

257. Recent developments and upgrades to the Geant4 geometry modeler

Dr Gabriele Cosmo (CERN)

13/02/2006, 14:54

Event processing applications

oral presentation

The Geometry modeler is a key component of the Geant4 tookit. It has been designed to exploit at the best the features provided by the Geant4 simulation toolkit, allowing the description in a natural way of the geometrical structure of complex detectors, from a few up to the hundreds of thousands of volumes of the LHC experiments, as well as human phantoms for medical applications or...

392. Recent upgrates of the standard electromagnetic physics package in Geant4

Dr Michel Maire (LAPP)

13/02/2006, 15:12

Event processing applications

oral presentation

The current status and the recent developments of Geant4 "Standard" electromagnetic package are presented. The design iteration of the package carried out for the last two years is completed. It provides model versus process structure of the code. The internal database of elements and materials based on the NIST databases is introduced inside the Geant4 toolkit as well. The focus of...

121. HepData and JetWeb: HEP Data Archiving and Model Validation

Dr Andy Buckley (Durham University), Andy Buckley (University of Cambridge)

13/02/2006, 16:00

Event processing applications

oral presentation

Accurate modelling of hadron interactions is essential for the precision analysis of data from the LHC. It is therefore imperative that the predictions of Monte Carlos used to model this physics are tested against relevant existing and future measurements. These measurements cover a wide variety of reactions, experimental observables and kinematic regions. To make this process more...

300. Geant4 Acceptance Suite for Key Observables

Dr Alberto Ribon (CERN)

13/02/2006, 16:18

Event processing applications

oral presentation

The complexity of the Geant4 code requires careful testing of all of its components, especially before major releases. In this talk, we will concentrate on the recent development of an automatic suite for testing hadronic physics in high energy calorimetry applications. The idea is to use a simplified set of hadronic calorimeters, with different beam particle types, and various beam...

302. Systematic validation of Geant4 electromagnetic and hadronic models against proton data

Dr Aatos Heikkinen (HIP), Dr Barbara Mascialino (INFN Genova), Dr Francesco Di Rosa (INFN LNS), Dr Giacomo Cuttone (INFN LNS), Dr Giorgio Russo (INFN LNS), Dr Giuseppe Antonio Pablo Cirrone (INFN LNS), Dr Maria Grazia Pia (INFN GENOVA), Dr Susanna Guatelli (INFN Genova)

13/02/2006, 16:36

Event processing applications

oral presentation

A project is in progress for a systematic, rigorous, quantitative validation of all Geant4 physics models against experimental data, to be collected in a Geant4 Physics Book. Due to the complexity of Geant4 hadronic physics, the validation of Geant4 hadronic models proceeds according to a bottom-up approach (i.e. from the lower energy range up to higher energies): this approach allows...

308. Simulation for LHC radiation background: optimisation of monitoring detectors and experimental validation

Dr Barbara Mascialino (INFN Genova), Dr Federico Ravotti (CERN), Dr Maria Grazia Pia (INFN GENOVA), Dr Maurice Glaser (CERN), Dr Michael Moll (CERN), Dr Riccardo Capra (INFN Genova)

13/02/2006, 16:54

Event processing applications

oral presentation

Monitoring radiation background is a crucial task for the operation of LHC experiments. A project is in progress at CERN for the optimisation of the radiation monitors for LHC experiments. A general, flexibly configurable simulation system based on Geant4, designed to assist the engineering optimisation of LHC radiation monitor detectors, is presented. Various detector packaging...

205. Simulation of heavy ion therapy system using Geant4

Dr Satoru Kameoka (High Energy Accelerator Research Organisation)

13/02/2006, 17:12

Event processing applications

oral presentation

Geant4 is a toolkit to simulate the passage of a particle through matter based on Monte Carlo method. Geant4 incorporates many of available experimental data and theoretical models over wide energy region, extending its application scope not only to high energy physics but also medical physics, astro-physics, etc. We have developed a simulation framework for heavy ion therapy system based...

3. The ATLAS Detector Simulation -an LHC challenge

Prof. Adele Rimoldi (University of Pavia)

13/02/2006, 17:30

Event processing applications

oral presentation

The simulation program for the ATLAS experiment at CERN is currently in a full operational mode and integrated into the ATLAS’s common analysis framework, ATHENA. The OO approach, based on GEANT4, and in use during the DC2 data challenge has been interfaced within ATHENA and to GEANT4 using the LCG dictionaries and Python scripting. The robustness of the application was proved during the...

379. EvtGen project in ATLAS

Roger Jones (Lancaster University)

13/02/2006, 17:48

Event processing applications

oral presentation

The project “EvtGen in ATLAS” has the aim of accommodating EvtGen into the LHC-ATLAS context. As such it comprises both physics and software aspects of the development. ATLAS has developed interfaces to enable the use of EvtGen within the experiment's object-oriented simulation and data-handling framework ATHENA, and furthermore has enabled the running of the software on the LCG. ...

243. CMS Detector and Physics Simulation

Dr Maya Stavrianakou (FNAL)

14/02/2006, 14:00

Event processing applications

oral presentation

The CMS simulation based on the Geant4 toolkit and the CMS object-oriented framework has been in production for almost two years and has delivered a total of more than a 100 M physics events for the CMS Data Challenges and Physics Technical Design Report studies. The simulation software has recently been successfully ported to the new CMS Event-Data-Model based software framework. In this...

96. The new ATLAS Fast Track Simulation engine (FATRAS)

Mr Andreas Salzburger (UNIVERSITY OF INNSBRUCK)

14/02/2006, 14:18

Event processing applications

oral presentation

Various systematic physics and detector performance studies with the ATLAS detector require very large event samples. To generate those samples, a fast simulation technique is used instead of the full detector simulation, which often takes too much effort in terms of computing time and storage space. The widely used ATLAS fast simulation program ATLFAST, however, is based on intial four...

253. GFLASH - parameterized electromagnetic shower in CMS

Joanna Weng (Karlsruhe/CERN)

14/02/2006, 14:36

Event processing applications

oral presentation

An object-oriented package for parameterizing electromagnetic showers in the framework of the Geant4 toolkit has been developed. This parameterization is based on the algorithms in the GFLASH package (implemented in Geant3 / FORTRAN), but has been adapted to the new simulation context of Geant4. This package can substitute the full tracking of high energy electrons/positrons(normally form...

76. The ATLAS Event Data Model

Dr Edward Moyse (University of Massachusetts)

14/02/2006, 14:54

Event processing applications

oral presentation

The event data model (EDM) of the ATLAS experiment is presented. For large collaborations like the ATLAS experiment common interfaces and data objects are a necessity to insure easy maintenance and coherence of the experiments software platform over a long period of time. The ATLAS EDM improves commonality across the detector subsystems and subgroups such as trigger, test beam...

242. The New CMS Event Data Model and Framework

Dr Christopher Jones (CORNELL UNIVERSITY)

14/02/2006, 15:12

Event processing applications

oral presentation

The new CMS Event Data Model and Framework that will be used for the high level trigger, reconstruction, simulation and analysis is presented. The new framework is centered around the concept of an Event. A data processing job is composed of a series of algorithms (e.g., a track finder or track fitter) that run in a particular order. The algorithms only communicate via data stored in...

391. The ALICE Offline framework

Federico Carminati (CERN)

14/02/2006, 16:00

Event processing applications

oral presentation

The ALICE Offline framework is now in its 8th year of development and is now close to be used for data taking. This talk will provide a short description of the history of AliRoot and then will describe the latest developments. The newly added alignment framework, based on the ROOT geometrical modeller will be described. The experience with the FLUKA MonteCarlo used for full detector...

177. The BESIII Offline Software

Dr Weidong Li (IHEP, Beijing)

14/02/2006, 16:18

Event processing applications

oral presentation

The BESIII is a general-purpose experiment for studying electron-positron collision at BEPCII, which is currently under construction at IHEP, Beijing. The BESIII offline software system is built on the Gaudi architecture. This contribution describes the BESIII specific framework implementation for offline data processing and physics analysis. And we will also present the development status...

422. A modular Reconstruction Software Framework for the ILC

Frank Gaede (DESY)

14/02/2006, 16:36

Event processing applications

oral presentation

The International Linear Collider project ILC is in a very active R&D phase where currently three different detector concepts are developed in international working groups. In order to investigate and optimize the different detector concepts and their physics potential it is highly desirable to have flexible and easy to use software tools. In this talk we present Marlin, a modular C++...

37. CBM Simulation and Analysis Framework

Dr Denis Bertini (GSI Darmstadt)

14/02/2006, 16:54

Event processing applications

oral presentation

The simulation and analysis framework of the CBM collaboration will be presented. CBM (Compressed Baryonic Matter) is an experiment at the future FAIR (Facility for Antiproton and Ion Research) in Darmstadt. The goal of the experiment is to explore the phase diagram of strongly interacting matter in high-energy nucleus-nucleus collisions. The Virtual Monte Carlo concept allows...

387. FLUKA and the Virtual Monte Carlo

Andreas.Morsch@cern.ch Morsch (CERN)

14/02/2006, 17:12

Event processing applications

oral presentation

The ALICE Offline Project has developed a virtual interface to the detector transport code called Virtual Monte Carlo. It isolates the user code from changes of the detector simulation package and hence allows a seamless transition from GEANT3 to GEANT4 and FLUKA. Moreover, a new geometrical modeler has been developed in collaboration with the ROOT team, and successfully interfaced to...

270. CMS Reconstruction Software

Dr Tommaso Boccali (Scuola Normale Superiore and INFN Pisa)

14/02/2006, 17:30

Event processing applications

oral presentation

The Reconstruction Software for the CMS detector is designed to serve multiple use cases, from the online triggering of the High Level Trigger to the offline analysis. The software is based on the CMS Framework, and comprises reconstruction modules which can be scheduled independently. These produce and store event data ranging from low-level objects to objects useful for analysis on...

385. Track reconstruction algorithms for the ALICE High-Level Trigger

Marian Ivanov (CERN)

14/02/2006, 17:48

Event processing applications

oral presentation

An overview of the online reconstruction algorithms for the ALICE Time Projection Chamber and Inner Tracking System is given. Both the tracking efficiency and the time performance of the algorithms are presented in details. The application of the tracking algorithms in possible high transverse momentum jet and open charm triggers is discussed.

77. Track reconstruction with the ATLAS Detector

Mr David Primor (Tel Aviv University, ISRAEL (CERN))

15/02/2006, 14:00

Event processing applications

oral presentation

This talk presents new methods to address the problem of muon track identification in the monitored drift tube chambers (MDT) of the ATLAS Muon Spectrometer. Pattern recognition techniques, employed by the current reconstruction software suffer when exposed to the high background rates expected at the LHC. We propose new techniques, exploiting existing knowledge of the detector...

155. Adaptive on-the-fly calibration of TPC distortions

Dr GENE VAN BUREN (BROOKHAVEN NATIONAL LABORATORY)

15/02/2006, 14:18

Event processing applications

oral presentation

The Solenoid Tracker At RHIC (STAR) experiment has observed luminosity fluctuations on time scales much shorter than expected during its design and construction. These operating conditions lead to rapid variations in distortions of data from the STAR TPC which are dependent upon the luminosity and planned techniques for calibrating these distortions became insufficient to provide high...

1. RecPack, a general reconstruction toolkit

Dr Anselmo Cervera Villanueva (University of Geneva)

15/02/2006, 14:36

Event processing applications

oral presentation

RecPack is a general reconstruction toolkit, which can be used as a base for any reconstruction program for a HEP detector. Its main functionalities are track finding, fitting, propagation and matching. Track fitting can be done either via conventional least squares methods or Kalman Filter techniques. The last, in conjunction with the matching package, allows simultaneous track finding...

356. Track based alignment of composite detector structures

Mr Tapio Lampen (HELSINKI INSTITUTE OF PHYSICS)

15/02/2006, 14:54

Event processing applications

oral presentation

Modern tracking detectors are composed of a large number of modules assembled in a hierarchy of support structures. The sensor modules are assembled in ladders or petals. Ladders and petals in turn are assembled in cylindrical or disk-like layers and layers are assembled to make a complete tracking device. Sophisticated geometrical calibration is essential in these kind of detector...

67. Software Solutions for a Variable ATLAS Detector Description

Vakhtang Tsulaia (UNIVERSITY OF PITTSBURGH)

15/02/2006, 15:12

Event processing applications

oral presentation

This talk addresses two issues related to the implementation of a variable software description of the ATLAS detector. The first topic is how we implement an evolving description of an evolving ATLAS detector, including special configurations at varying levels of realism, in a way which plugs into the simulation and reconstruction software. The second topic is how time-dependent...

394. Track reconstruction in high density environment

Marian Ivanov (CERN)

15/02/2006, 16:00

Event processing applications

oral presentation

Tracks finding and fitting algorithm in ALICE barrel detectors, Time projection chamber (TPC), Inner Tracking System (ITS), Transition radiation detector (TRD) based on the Kalman-filtering are presented. The filtering algorithm is able to cope with non-Gaussian noise and ambiguous measurements in high-density environments. The approach have been implemented within the ALICE...

135. High Energy Physics Event Selection with Gene Expression Programming

Dr Liliana Teodorescu (Brunel University)

15/02/2006, 16:18

Event processing applications

oral presentation

Evolutionary Algorithms, with Genetic Algorithms (GA) and Genetic Programming (GP) as the most known versions, have a gradually increasing presence in High Energy Physics. They were proven successful in solving problems such as regression, parameter optimisation and event selection. Gene Expression Programming (GEP) is a new evolutionary algorithm that combines the advantages of both GA...

241. Access to Non-Event Data for CMS

Dr Christopher Jones (CORNELL UNIVERSITY)

15/02/2006, 16:36

Event processing applications

oral presentation

In order to properly understand the data taken for an HEP Event, information external to the Event must be available. Such information includes geometry descriptions, calibrations values, magnetic field readings plus many more. CMS has chosen a unified approach to access to such information via a data model based on the concept of an 'Interval of Validity', IOV. This data model is...

319. The LHCb Alignment framework

Dr JUAN PALACIOS (CERN)

15/02/2006, 16:54

Event processing applications

oral presentation

The LHCb alignment framework allows clients of the LHCb detector description software suite (DetDesc) to modify the position of components of the detector at run-time and see the changes propagated to all users of the detector geometry. DetDesc is used in the simulation, digitization and reconstruction phases of data processing and the alignment framework is available in all these stages....

84. Implementation of a global fit method for the alignment of the Silicon Tracker in ATLAS Athena framework

Adlene Hicheur (Particle Physics)

15/02/2006, 17:12

Event processing applications

oral presentation

The ATLAS Inner Detector is composed of a pixel detector (PIX), a silicon strip detector (SCT) and a Transition radiation tracker (TRT). The goal of the algorithm is to align the silicon based detectors (PIX and SCT) using a global fit of the alignment constants. The total number of PIX and SCT silicon modules is about 35000, leading to many challenges. The current presentation will focus...

321. COCOA: General purpose software for simulation and reconstruction of optical alignment systems

Pedro Arce (Cent.de Investigac.Energeticas Medioambientales y Tecnol. (CIEMAT))

15/02/2006, 17:30

Event processing applications

oral presentation

We describe a C++ software that is able to reconstruct the positions, angular orientations and internal optical parameters of any optical system described by a seamless combination of many different types of optical objects. The program also handles the propagation of uncertainties, what makes it very useful to simulate the system in the design phase. The software is currently in use by...

24. OHP: An Online Histogram Presenter for the ATLAS experiment

Dr Andrea Dotti (Università and INFN Pisa)

16/02/2006, 14:00

Event processing applications

oral presentation

ATLAS is one of the four experiments under construction along the Large Hadron Collider ring at CERN. During the last few years much effort has gone in carrying out test beam sessions that allowed to assess the performance of ATLAS sub-detectors. During the data taking we have started the development of an histogram display application designed to satisfy the needs of all ATLAS...

312. Software for the CMS Cosmic Challenge

Dr Giacomo Bruno (UCL, Louvain-la-Neuve, Belgium)

16/02/2006, 14:18

Event processing applications

oral presentation

At the end of 2004 CMS decided to redesign the software framework used for simulation and reconstruction. The new design includes a completely revisited event data model. This new software will be used in the first months of 2006 for the so called Magnet Test Cosmic Challenge (MTCC). The MTCC is a slice test in which a small fraction of all the CMS detection equipment is expected to be...

33. Event visualisation for the ATLAS experiment - the technologies involved

Zdenek Maxa (University College London)

16/02/2006, 14:36

Event processing applications

oral presentation

We describe the design of Atlantis, an event visualisation program for the ATLAS experiment at CERN, and the other supporting applications within the visualisation project, mainly focusing on the technologies employed. The ATLAS visualisation consists of several parts with Atlantis being the central application. The main purpose of Atlantis is to help visually investigate and intuitively...

354. Application of data visualisation techniques in particle physics

Prof. Stephen Watts (Brunel University)

16/02/2006, 14:54

Event processing applications

oral presentation

Visualisation of data in particle physics currently involves event displays, histograms and scatterplots. Since 1975 there has been an explosion of techniques for data visualisation driven by highly interactive computer systems and ideas from statistical graphics. This field has been driven by demands for data mining of large databases and genomics. Two key areas are direct manipulation of...

283. Data Quality Monitoring for the CMS Silicon Tracker

Dr Suchandra Dutta (Scuola Normale Superiore, INFN, Pisa), Dr Vincenzo Chiochia (University of Zurich)

16/02/2006, 15:12

Event processing applications

oral presentation

The CMS silicon tracker, consisting of about 17,000 detector modules divided into micro-strip and pixel sensors, will be the largest silicon tracker ever realized for high energy physics experiments. The detector performance will be monitored using applications based on the CMS Data Quality Monitoring (DQM) framework and running on the High-Level Trigger Farm as well as local DAQ systems....