Pub Date : 2010-05-24DOI: 10.1109/RTC.2010.5750480
M. Siciliano
In this paper, the Quality Assurance (QA) and Data Quality Monitoring (DQM) of the ALICE Silicon Drift Detectors will be discussed. The Quality Assurance functionality has been implemented as part of AliRoot, the ALICE software framework, so as to use the same code in offline and online mode. The QA system manages the three sub-detectors of the Inner Tracking System (ITS) in a modular way, in order to run the Quality Assurance of all or just one of them, creating the QA distributions for the selected detector(s). The ITS-QA framework can also be used for the online monitoring of the sub-detectors thanks to its interface to the AMORE (Automatic MonitoRing Environment) Data Quality Monitoring (DQM) framework, in turn interfaced to the Data Acquisition System. The online mode is steered by a specific subdetector agent that makes use of functionality provided by AMORE to connect and receive events from the Data Acquisition System, invokes AliRoot code for their reconstruction and analysis and for filling the QA distributions and then handles these distributions to AMORE that publishes them to its Database. A dedicated GUI allows the operators to retrieve and display the subdetector QA distributions from the AMORE Database. The SDD QA and DQM are fully operational since the beginning of the ALICE data taking and are important tools to assess the data quality both in real time and in the offline analysis.
{"title":"Quality Assurance and Data Quality Monitoring for the ALICE Silicon Drift Detectors","authors":"M. Siciliano","doi":"10.1109/RTC.2010.5750480","DOIUrl":"https://doi.org/10.1109/RTC.2010.5750480","url":null,"abstract":"In this paper, the Quality Assurance (QA) and Data Quality Monitoring (DQM) of the ALICE Silicon Drift Detectors will be discussed. The Quality Assurance functionality has been implemented as part of AliRoot, the ALICE software framework, so as to use the same code in offline and online mode. The QA system manages the three sub-detectors of the Inner Tracking System (ITS) in a modular way, in order to run the Quality Assurance of all or just one of them, creating the QA distributions for the selected detector(s). The ITS-QA framework can also be used for the online monitoring of the sub-detectors thanks to its interface to the AMORE (Automatic MonitoRing Environment) Data Quality Monitoring (DQM) framework, in turn interfaced to the Data Acquisition System. The online mode is steered by a specific subdetector agent that makes use of functionality provided by AMORE to connect and receive events from the Data Acquisition System, invokes AliRoot code for their reconstruction and analysis and for filling the QA distributions and then handles these distributions to AMORE that publishes them to its Database. A dedicated GUI allows the operators to retrieve and display the subdetector QA distributions from the AMORE Database. The SDD QA and DQM are fully operational since the beginning of the ALICE data taking and are important tools to assess the data quality both in real time and in the offline analysis.","PeriodicalId":345878,"journal":{"name":"2010 17th IEEE-NPSS Real Time Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116945160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/RTC.2010.5750332
R. Černe, Z. Lestan, U. Mavrič, B. Repic, B. Baricevic, A. Bardorfer, P. Beltram, T. Beltram, J. Menart, G. Jug, C. Bocchetta
This article presents a generic digital control system for the stabilization of Radio Frequency (RF) fields used in particle accelerators, the Libera LLRF. Low Level RF (LLRF) systems have an important contribution in the overall performance of the accelerator since they are responsible for the control of amplitude and phase of electromagnetic fields inside the accelerating structures. The goal was to develop a high performance, small form factor system that uses the latest advances in technology. In order to fulfill these design goals Micro Telecommunications Computing Architecture (MicroTCA) and related standards were chosen as a basis for the system's hardware and software development. Results of hardware development are three different types of Advanced Mezzanine Cards (AMC), Interconnection Board (ICB), chassis, backplane and replaceable fan modules. The AMC boards are LLRF application specific and have input/output ports for RF signals. In order to enable support for different RF frequencies, they also include replaceable RF circuits. The ICB implements the functions of a MicroTCA Carrier Hub (MCH) and acts as a COM Express carrier board for the mounted COM Express module. With its different ports at the front, the ICB enables local and remote operation and maintenance of the Libera LLRF. Chassis management is implemented according to the Intelligent Platform Management Interface (IPMI) protocol. The LLRF application software, which runs on the Linux operating system and includes a Graphical User Interface (GUI), enables the user to operate the system and monitor different types of RF signals.
{"title":"Digital RF stabilization system based on MicroTCA technology","authors":"R. Černe, Z. Lestan, U. Mavrič, B. Repic, B. Baricevic, A. Bardorfer, P. Beltram, T. Beltram, J. Menart, G. Jug, C. Bocchetta","doi":"10.1109/RTC.2010.5750332","DOIUrl":"https://doi.org/10.1109/RTC.2010.5750332","url":null,"abstract":"This article presents a generic digital control system for the stabilization of Radio Frequency (RF) fields used in particle accelerators, the Libera LLRF. Low Level RF (LLRF) systems have an important contribution in the overall performance of the accelerator since they are responsible for the control of amplitude and phase of electromagnetic fields inside the accelerating structures. The goal was to develop a high performance, small form factor system that uses the latest advances in technology. In order to fulfill these design goals Micro Telecommunications Computing Architecture (MicroTCA) and related standards were chosen as a basis for the system's hardware and software development. Results of hardware development are three different types of Advanced Mezzanine Cards (AMC), Interconnection Board (ICB), chassis, backplane and replaceable fan modules. The AMC boards are LLRF application specific and have input/output ports for RF signals. In order to enable support for different RF frequencies, they also include replaceable RF circuits. The ICB implements the functions of a MicroTCA Carrier Hub (MCH) and acts as a COM Express carrier board for the mounted COM Express module. With its different ports at the front, the ICB enables local and remote operation and maintenance of the Libera LLRF. Chassis management is implemented according to the Intelligent Platform Management Interface (IPMI) protocol. The LLRF application software, which runs on the Linux operating system and includes a Graphical User Interface (GUI), enables the user to operate the system and monitor different types of RF signals.","PeriodicalId":345878,"journal":{"name":"2010 17th IEEE-NPSS Real Time Conference","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116949676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/RTC.2010.5750470
R. Brancaccio, M. Bettuzzi, F. Casali, M. Morigi, G. Levi, A. Gallo, G. Marchetti, D. Schneberk
Computed Tomography is a non-destructive technique for which the object volume is reconstructed from a large series of radiographs acquired at different angles. Information can be retrieved as 2D cross section images allowing the inspection and the classification of the object; moreover, by processing tomographic data, a 3D numerical model of the full-volume sample can be obtained for virtual reality applications or digital archives storage. Computed Tomography is well known, specially in the medical field. However, it is a complex technique as soon as one wants to use it in a different way than in medicine (that means different scale, different energy range, different material composition and so on). The Kongo Rikishi is a Japanese wooden statue (over 200 cm of height) of the XIII century. The restoration has been carried out by the Conservation and Restoration Center La Venaria Reale, Turin, Italy. An high resolution Computed Tomography has been realized by the X-Ray Imaging Group of the Physics Department of Bologna University, Italy. To investigate the whole statue volume, up to 36 shootings are needed and for each of them 720 radiographs are acquired. To obtain the final volume (120 GB) 20 days of calculation are needed with a standard PC. In this work we will show the Proof of Concept that we have done using the Microsoft HPC cluster in Redmond. The Microsoft HPC environment has proved to be dramatically powerful and easy to use letting us reach important results quickly. Simply running many copies of the same software on different chunks of data using 20 cores has lead to an impressive speedup: up to a speed factor of 28. The same code, running on a new generation cluster of 32 cores, completed the elaborations with a speed rate factor of 75. These extraordinary results permit to reconstruct the volume in 6 hours instead of 20 days, making possible the real-time investigation of cultural objects.
{"title":"3D tomographic reconstruction on HPC cluster of the Kongo Rikishi (Japanese wooden statue of the XIII century)","authors":"R. Brancaccio, M. Bettuzzi, F. Casali, M. Morigi, G. Levi, A. Gallo, G. Marchetti, D. Schneberk","doi":"10.1109/RTC.2010.5750470","DOIUrl":"https://doi.org/10.1109/RTC.2010.5750470","url":null,"abstract":"Computed Tomography is a non-destructive technique for which the object volume is reconstructed from a large series of radiographs acquired at different angles. Information can be retrieved as 2D cross section images allowing the inspection and the classification of the object; moreover, by processing tomographic data, a 3D numerical model of the full-volume sample can be obtained for virtual reality applications or digital archives storage. Computed Tomography is well known, specially in the medical field. However, it is a complex technique as soon as one wants to use it in a different way than in medicine (that means different scale, different energy range, different material composition and so on). The Kongo Rikishi is a Japanese wooden statue (over 200 cm of height) of the XIII century. The restoration has been carried out by the Conservation and Restoration Center La Venaria Reale, Turin, Italy. An high resolution Computed Tomography has been realized by the X-Ray Imaging Group of the Physics Department of Bologna University, Italy. To investigate the whole statue volume, up to 36 shootings are needed and for each of them 720 radiographs are acquired. To obtain the final volume (120 GB) 20 days of calculation are needed with a standard PC. In this work we will show the Proof of Concept that we have done using the Microsoft HPC cluster in Redmond. The Microsoft HPC environment has proved to be dramatically powerful and easy to use letting us reach important results quickly. Simply running many copies of the same software on different chunks of data using 20 cores has lead to an impressive speedup: up to a speed factor of 28. The same code, running on a new generation cluster of 32 cores, completed the elaborations with a speed rate factor of 75. These extraordinary results permit to reconstruct the volume in 6 hours instead of 20 days, making possible the real-time investigation of cultural objects.","PeriodicalId":345878,"journal":{"name":"2010 17th IEEE-NPSS Real Time Conference","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125884980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/RTC.2010.5750400
A. Fernandes, R. Pereira, J. Sousa, A. Batista, Á. Combo, B. Carvalho, C. Correia, C. Varandas
The inherent parallelism of the logic resources, the flexibility in its configuration and the performance at high processing frequencies makes the field programmable gate array (FPGA) the most suitable device to be used both for real time algorithm processing and data transfer in instrumentation modules. Moreover, the reconfigurability of these FPGA based modules enables exploiting different applications on the same module. When using a reconfigurable module for various applications, the availability of a common interface library for easier implementation of the algorithms on the FPGA leads to more efficient development. The FPGA configuration is usually specified in a hardware description language (HDL) or other higher level descriptive language. The critical paths, as the management of internal hardware clocks, that require deep knowledge of the module behavior shall be implemented in HDL to optimize the timing constraints. The common interface library should include these critical paths, freeing the application designer from hardware complexity and able to choose any of the available high-level abstraction languages for the algorithm implementation. With this purpose a modular Verilog code was developed for the Virtex 4 FPGA of the in-house Transient Recorder and Processor (TRP) hardware module, based on the Advanced Telecommunications Computing Architecture (ATCA), with eight channels sampling at up to 400 MSamples/s. The TRP was designed to perform real time Pulse Height Analysis (PHA), Pulse Shape Discrimination (PSD) and Pile-Up Rejection (PUR) algorithms at a high count rate (few MHz). A brief description of this modular code is presented and examples of its use as interface with end user algorithms, including a PHA with PUR, are described.
{"title":"HDL based FPGA interface library for data acquisition and multipurpose real time algorithm processing","authors":"A. Fernandes, R. Pereira, J. Sousa, A. Batista, Á. Combo, B. Carvalho, C. Correia, C. Varandas","doi":"10.1109/RTC.2010.5750400","DOIUrl":"https://doi.org/10.1109/RTC.2010.5750400","url":null,"abstract":"The inherent parallelism of the logic resources, the flexibility in its configuration and the performance at high processing frequencies makes the field programmable gate array (FPGA) the most suitable device to be used both for real time algorithm processing and data transfer in instrumentation modules. Moreover, the reconfigurability of these FPGA based modules enables exploiting different applications on the same module. When using a reconfigurable module for various applications, the availability of a common interface library for easier implementation of the algorithms on the FPGA leads to more efficient development. The FPGA configuration is usually specified in a hardware description language (HDL) or other higher level descriptive language. The critical paths, as the management of internal hardware clocks, that require deep knowledge of the module behavior shall be implemented in HDL to optimize the timing constraints. The common interface library should include these critical paths, freeing the application designer from hardware complexity and able to choose any of the available high-level abstraction languages for the algorithm implementation. With this purpose a modular Verilog code was developed for the Virtex 4 FPGA of the in-house Transient Recorder and Processor (TRP) hardware module, based on the Advanced Telecommunications Computing Architecture (ATCA), with eight channels sampling at up to 400 MSamples/s. The TRP was designed to perform real time Pulse Height Analysis (PHA), Pulse Shape Discrimination (PSD) and Pile-Up Rejection (PUR) algorithms at a high count rate (few MHz). A brief description of this modular code is presented and examples of its use as interface with end user algorithms, including a PHA with PUR, are described.","PeriodicalId":345878,"journal":{"name":"2010 17th IEEE-NPSS Real Time Conference","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132079237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/RTC.2010.5750328
M. Correia, J. Sousa, A. Rodrigues, A. Batista, B. Gonçalves, C. Varandas, C. Correia
In contemporary control and data acquisition systems for Nuclear Fusion devices, the galloping need for high channel density and real-time multi-input-multi-output (MIMO) support gave rise to a new generation of hardware architecture based on the Advanced Telecommunications Computing Architecture (ATCA) specification. In addition, ATCA successfully delivered solutions in other sensitive issues such as form-factor component area, power dissipation and redundancy, complying with the high complexity and security required for such systems. Experience has showed, however, that due to its aforementioned complexity, such hardware devices can yield to a lengthy development. Furthermore, the ATCA specification is, as yet, somewhat undefined for instrumentation applications, more so within the specificities of Plasma Physics applied devices. The entitled “xTCA” specification is currently being developed for those purposes. Based on the ATCA itself, it will define new functionalities that standardize and facilitate hardware development for device operation in a Fusion control plant environment - most notably, dedicated timing and input-output (IO) port assignment on the Rear Transition Module (RTM). The prototype hereby presented is an xTCA Peripheral Component Interface (PCIe) switch Advanced Mezzanine Card (AMC) carrier blade. The device serves as a hub, as to control and handle I/O data from its parent nodes existing within the same xTCA shelf through its proprietary fabric channels in dual-star topology. Parent node blades, under development, are equally linked through xTCA's agnostic fabric in full-mesh topology, as to attain system MIMO functionality from all I/O endpoints. The switch blade carries up to four AMC modules, adding up to modularity and versatility. This allows for a much more independent and speedier hardware development, as dedicated AMC modules, such as data processing and storage devices, can be simultaneously projected. Commercial off-the-shelf (COTS) AMC products are readily available and may also be immediately integrated in the system.
{"title":"ATCA/xTCA-based hardware for control and data acquisition on Nuclear Fusion fast control plant systems","authors":"M. Correia, J. Sousa, A. Rodrigues, A. Batista, B. Gonçalves, C. Varandas, C. Correia","doi":"10.1109/RTC.2010.5750328","DOIUrl":"https://doi.org/10.1109/RTC.2010.5750328","url":null,"abstract":"In contemporary control and data acquisition systems for Nuclear Fusion devices, the galloping need for high channel density and real-time multi-input-multi-output (MIMO) support gave rise to a new generation of hardware architecture based on the Advanced Telecommunications Computing Architecture (ATCA) specification. In addition, ATCA successfully delivered solutions in other sensitive issues such as form-factor component area, power dissipation and redundancy, complying with the high complexity and security required for such systems. Experience has showed, however, that due to its aforementioned complexity, such hardware devices can yield to a lengthy development. Furthermore, the ATCA specification is, as yet, somewhat undefined for instrumentation applications, more so within the specificities of Plasma Physics applied devices. The entitled “xTCA” specification is currently being developed for those purposes. Based on the ATCA itself, it will define new functionalities that standardize and facilitate hardware development for device operation in a Fusion control plant environment - most notably, dedicated timing and input-output (IO) port assignment on the Rear Transition Module (RTM). The prototype hereby presented is an xTCA Peripheral Component Interface (PCIe) switch Advanced Mezzanine Card (AMC) carrier blade. The device serves as a hub, as to control and handle I/O data from its parent nodes existing within the same xTCA shelf through its proprietary fabric channels in dual-star topology. Parent node blades, under development, are equally linked through xTCA's agnostic fabric in full-mesh topology, as to attain system MIMO functionality from all I/O endpoints. The switch blade carries up to four AMC modules, adding up to modularity and versatility. This allows for a much more independent and speedier hardware development, as dedicated AMC modules, such as data processing and storage devices, can be simultaneously projected. Commercial off-the-shelf (COTS) AMC products are readily available and may also be immediately integrated in the system.","PeriodicalId":345878,"journal":{"name":"2010 17th IEEE-NPSS Real Time Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130897756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/RTC.2010.5750381
T. Bellizio, R. Albanese, G. Ambrosino, M. Ariola, G. Artaserse, F. Crisanti, V. Coccorese, G. De Tommasi, P. Lomas, F. Maviglia, A. Neto, A. Pironti, F. Rimini, F. Sartori, R. Vitelli, L. Zabeo
Tokamaks are the most promising approach for nuclear fusion on earth. They are toroidal machines where the plasma is heated in a ring-shaped vessel and kept away from the vessel by applied magnetic fields. To achieve high performance in tokamaks, plasmas with elongated poloidal cross-section are needed. Such elongated plasmas are vertically unstable, hence position control on a fast time scale is clearly an essential feature of all machines. In this context the Plasma Control Upgrade (PCU) project was aimed at increasing the capabilities of the Vertical Stabilization (VS) of the JET tokamak. This paper introduces the new JET VS system and focuses on how the flexibility of this real-time system has been exploited to enlarge its operational limits in terms of maximum controllable disturbance. Moreover, the experiments recently carried out at JET are presented.
{"title":"Using magnetic diagnostics to extrapolate operational limits in elongated tokamak plasmas","authors":"T. Bellizio, R. Albanese, G. Ambrosino, M. Ariola, G. Artaserse, F. Crisanti, V. Coccorese, G. De Tommasi, P. Lomas, F. Maviglia, A. Neto, A. Pironti, F. Rimini, F. Sartori, R. Vitelli, L. Zabeo","doi":"10.1109/RTC.2010.5750381","DOIUrl":"https://doi.org/10.1109/RTC.2010.5750381","url":null,"abstract":"Tokamaks are the most promising approach for nuclear fusion on earth. They are toroidal machines where the plasma is heated in a ring-shaped vessel and kept away from the vessel by applied magnetic fields. To achieve high performance in tokamaks, plasmas with elongated poloidal cross-section are needed. Such elongated plasmas are vertically unstable, hence position control on a fast time scale is clearly an essential feature of all machines. In this context the Plasma Control Upgrade (PCU) project was aimed at increasing the capabilities of the Vertical Stabilization (VS) of the JET tokamak. This paper introduces the new JET VS system and focuses on how the flexibility of this real-time system has been exploited to enlarge its operational limits in terms of maximum controllable disturbance. Moreover, the experiments recently carried out at JET are presented.","PeriodicalId":345878,"journal":{"name":"2010 17th IEEE-NPSS Real Time Conference","volume":"258 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132754245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/RTC.2010.5750478
F. Acernese, R. De Rosa, G. Giordano, R. Romano, S. Vilasi, G. Persichetti, F. Barone
This paper describes a new mechanical version of the monolithic tunable folded pendulum, developed at the University of Salerno, configurable both as seismometer and, in a force-feedback configuration, as accelerometer. Typical applications of the sensors are in the field of geophysics, including the study of seismic and newtonian noise for characterization of suitable sites for underground interferometers for gravitational waves detection. The sensor, shaped with precision machining and electric-discharge machining, is a very compact instrument, very sensitive in the low-frequency seismic noise band, with a very good immunity to environmental noises. Important characteristics are the tunable resonance frequency and the integrated laser optical readout, consisting of an optical lever and/or an interferometer. The theoretical sensitivity curves, largely improved due to a new design of the pendulum arms and of the electronics, are in a very good agreement with the measurements. The results of the monolithic sensor as accelerometer (force feed-back configuration) are also presented and discussed.
{"title":"A new architecture for the implementation of force-feedback tunable mechanical monolithic horizontal sensor","authors":"F. Acernese, R. De Rosa, G. Giordano, R. Romano, S. Vilasi, G. Persichetti, F. Barone","doi":"10.1109/RTC.2010.5750478","DOIUrl":"https://doi.org/10.1109/RTC.2010.5750478","url":null,"abstract":"This paper describes a new mechanical version of the monolithic tunable folded pendulum, developed at the University of Salerno, configurable both as seismometer and, in a force-feedback configuration, as accelerometer. Typical applications of the sensors are in the field of geophysics, including the study of seismic and newtonian noise for characterization of suitable sites for underground interferometers for gravitational waves detection. The sensor, shaped with precision machining and electric-discharge machining, is a very compact instrument, very sensitive in the low-frequency seismic noise band, with a very good immunity to environmental noises. Important characteristics are the tunable resonance frequency and the integrated laser optical readout, consisting of an optical lever and/or an interferometer. The theoretical sensitivity curves, largely improved due to a new design of the pendulum arms and of the electronics, are in a very good agreement with the measurements. The results of the monolithic sensor as accelerometer (force feed-back configuration) are also presented and discussed.","PeriodicalId":345878,"journal":{"name":"2010 17th IEEE-NPSS Real Time Conference","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124534419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/RTC.2010.5750465
A. de la Peña, L. Pacios, F. Lapayese, R. Carrasco
A real-time control system has been operating successfully for the TJ-II stellarator since 1997. It was designed and built as a set of distributed and autonomous systems based on VMEbus and OS9 RTOS. At present, an upgrade, based on the VxWorks operating system, is being undertaken. As this process is gradual, both current and future real-time control systems must work simultaneously until this upgrade is completed. A new communication middleware architecture that implements XML-based Messages Distribution Service has been developed and applied for this. It has been created in response to the need to standardize the message publish-subscribe programming model for the TJ-II distributed control systems. It permits data, events and commands to be sent and received between distributed control applications that run on different real-time operating systems (OS9 and VxWorks) as well as Java-based applications running on any Windows or Linux platform. It has been fully tested and found to be both reliable and safe. Specific software tools have been developed to create, manage and monitor any distributed control variables involved in TJ-II experiments.
{"title":"New middleware software for message distribution in the TJ-II control environment","authors":"A. de la Peña, L. Pacios, F. Lapayese, R. Carrasco","doi":"10.1109/RTC.2010.5750465","DOIUrl":"https://doi.org/10.1109/RTC.2010.5750465","url":null,"abstract":"A real-time control system has been operating successfully for the TJ-II stellarator since 1997. It was designed and built as a set of distributed and autonomous systems based on VMEbus and OS9 RTOS. At present, an upgrade, based on the VxWorks operating system, is being undertaken. As this process is gradual, both current and future real-time control systems must work simultaneously until this upgrade is completed. A new communication middleware architecture that implements XML-based Messages Distribution Service has been developed and applied for this. It has been created in response to the need to standardize the message publish-subscribe programming model for the TJ-II distributed control systems. It permits data, events and commands to be sent and received between distributed control applications that run on different real-time operating systems (OS9 and VxWorks) as well as Java-based applications running on any Windows or Linux platform. It has been fully tested and found to be both reliable and safe. Specific software tools have been developed to create, manage and monitor any distributed control variables involved in TJ-II experiments.","PeriodicalId":345878,"journal":{"name":"2010 17th IEEE-NPSS Real Time Conference","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128540710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/TNS.2011.2159391
R. Pereira, A. Fernandes, A. Neto, J. Sousa, C. Varandas, J. Cardoso, C. Correia, M. Tardocchi, M. Nocente, G. Gorini, V. Kiptily, B. Syme, M. Jennison
A new Data Acquisition (DAQ) sub-system for gamma-ray diagnostics was developed for Joint European Torus (JET). The system is based on the ATCA platform and is able to sample up to 400 MSPS with 14-bit resolution. This DAQ is used for gamma-ray diagnostics dedicated to the study of fast ions in fusion tokamak plasma experiments. The present work describes the development of pulse processing algorithms used to extract the pulse parameters from the DAQ free running ADC data streams. These algorithms are divided in three main functional blocks, namely, advanced triggering and segmentation, segmentation validation and finally, peak height analysis (PHA) and pile-up rejection (PUR).
{"title":"Pulse analysis for gamma-ray diagnostics ATCA sub-systems of JET tokamak","authors":"R. Pereira, A. Fernandes, A. Neto, J. Sousa, C. Varandas, J. Cardoso, C. Correia, M. Tardocchi, M. Nocente, G. Gorini, V. Kiptily, B. Syme, M. Jennison","doi":"10.1109/TNS.2011.2159391","DOIUrl":"https://doi.org/10.1109/TNS.2011.2159391","url":null,"abstract":"A new Data Acquisition (DAQ) sub-system for gamma-ray diagnostics was developed for Joint European Torus (JET). The system is based on the ATCA platform and is able to sample up to 400 MSPS with 14-bit resolution. This DAQ is used for gamma-ray diagnostics dedicated to the study of fast ions in fusion tokamak plasma experiments. The present work describes the development of pulse processing algorithms used to extract the pulse parameters from the DAQ free running ADC data streams. These algorithms are divided in three main functional blocks, namely, advanced triggering and segmentation, segmentation validation and finally, peak height analysis (PHA) and pile-up rejection (PUR).","PeriodicalId":345878,"journal":{"name":"2010 17th IEEE-NPSS Real Time Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129656506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-05-24DOI: 10.1109/RTC.2010.5750464
W. Badgett, J. A. Lopez-Perez, K. Maeshima, A. Soha, Balys Sulmanas, Z. Wan
With the growth in size and complexity of High Energy Physics experiments, and the accompanying increase in the number of collaborators spread across the globe, the importance of widely relaying timely monitoring and status information has grown. To this end, we present online Web Based Monitoring solutions from the CMS experiment at CERN. The web tools developed present data to the user from many underlying heterogeneous sources, from real time messaging system to relational databases. We provide the power to combine and correlate data in both graphical and tabular formats of interest to the experimentalist, with data such as beam conditions, luminosity, trigger rates, detector conditions and many others, allowing for flexibility on the user side. We also present some examples of how this system has been used during CMS commissioning and early beam collision running at the Large Hadron Collider.
{"title":"CMS Web-Based Monitoring","authors":"W. Badgett, J. A. Lopez-Perez, K. Maeshima, A. Soha, Balys Sulmanas, Z. Wan","doi":"10.1109/RTC.2010.5750464","DOIUrl":"https://doi.org/10.1109/RTC.2010.5750464","url":null,"abstract":"With the growth in size and complexity of High Energy Physics experiments, and the accompanying increase in the number of collaborators spread across the globe, the importance of widely relaying timely monitoring and status information has grown. To this end, we present online Web Based Monitoring solutions from the CMS experiment at CERN. The web tools developed present data to the user from many underlying heterogeneous sources, from real time messaging system to relational databases. We provide the power to combine and correlate data in both graphical and tabular formats of interest to the experimentalist, with data such as beam conditions, luminosity, trigger rates, detector conditions and many others, allowing for flexibility on the user side. We also present some examples of how this system has been used during CMS commissioning and early beam collision running at the Large Hadron Collider.","PeriodicalId":345878,"journal":{"name":"2010 17th IEEE-NPSS Real Time Conference","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130075964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：