ICALEPCS2013 - List of Keywords (cryogenics)

Paper	Title	Other Keywords	Page
TUPPC006	Identifying Control Equipment	database, EPICS, controls, interface	562
	M.R. Clausen, M. Möller DESY, Hamburg, Germany
	The cryogenic installations at DESY are widely spread over the DESY campus. Many new components have been and will be installed for the new European XFEL. Commissioning and testing takes a lot of time. Local tag labels help identify the components but it is error prone to type in the names. Local bar-codes and/or datamatrix codes can be used in conjunction with intelligent devices like smart (i)Phones to retrieve data directly from the control system. The developed application will also show information from the asset database. This will provide the asset properties of the individual hardware device including the remaining warranty. Last not least cables are equipped with a bar-code which helps to identify start and endpoint of the cable and the related physical signal. This paper will describe our experience with the mobile applications and the related background databases which are operational already for several years.
	Poster TUPPC006 [0.398 MB]

TUPPC090	Digital Control System of High Extensibility for KAGRA	controls, laser, power-supply, detector	794
	H. Kashima, N. Araki, M. Ishizuka, T. Masuoka, H. Mukai Hitachi Zosen, Osaka, Japan O. Miyakawa ICRR, Chiba, Japan
	KAGRA is the large scale cryogenic gravitational wave telescope project in Japan which is developed and constructed by ICRR. of The University of Tokyo. Hitz Hitachi Zosen produced PCI Express I/O chassis and the anti-aliasing/anti-imaging filter board for KAGRA digital control system. These products are very important for KAGRA interferometer from the point of view of low noise operations. This paper reports the performance of these products.
	Poster TUPPC090 [0.487 MB]

THPPC057	Validation of the Data Consolidation in Layout Database for the LHC Tunnel Cryogenics Controls Package	controls, database, PLC, operation	1197
	A. Tovar, C. Balle, E.B. Blanco Vinuela, C. Fluder, E. Fortescue-Beck, P. Gomes, V. Inglese, M. Pezzetti CERN, Geneva, Switzerland
	The control system of the Large Hadron Collider cryogenics manages over 34,000 instrumentation channels which are essential for populating the software of the PLCs (Programmable Logic Controller) and SCADA (Supervisory Control and Data Acquisition) responsible for maintaining the LHC at the appropriate operating conditions. The control system specification's are generated by the CERN UNICOS (Unified Industrial Control System) framework using a set of information of database views extracted from the LHC layout database. The LHC layout database is part of the CERN database managing centralized and integrated data, documenting the whole CERN infrastructures (Accelerator complex) by modeling their topographical organization (“layouts”), and defining their components (functional positions) and the relationships between them. This paper describes the methodology of the data validation process, including the development of different software tools used to update the database from original values to manually adjusted values after three years of machine operation, as well as the update of the data to accommodate the upgrade of the UNICOS Continuous Process Control package(CPC).

THPPC072	Superconducting Cavity Quench Detection and Prevention for the European XFEL	cavity, operation, LLRF, coupling	1239
	J. Branlard, V. Ayvazyan, O. Hensler, H. Schlarb, Ch. Schmidt DESY, Hamburg, Germany W. Cichalewski TUL-DMCS, Łódź, Poland
	Due to its large scale, the European X-ray Free Electron Laser accelerator (XFEL) requires a high level of automation for commissioning and operation. Each of the 800 superconducting RF cavities simultaneously running during normal operation can occasionally quench, potentially tripping the cryogenic system and resulting into machine down-time. A fast and reliable quench detection system is then a necessity to rapidly detect individual cavity quenches and take immediate action, thus avoiding interruption of machine operation. In this paper, the mechanisms implemented in the low level RF system (LLRF) to prevent quenches and the algorithms developed to detect if a cavity quenches anyways are explained. In particular, the different types of cavity quenches and the techniques developed to identify them are shown. Experimental results acquired during the testing of XFEL cryomodules prototypes at DESY are presented, demonstrating the performance and efficiency of this machine operation and cavity protection tool.

THPPC077	A Fuzzy-Oriented Solution for Automatic Distribution of Limited Resources According to Priority Lists	simulation, controls, superconducting-magnet, operation	1246
	M. Pezzetti, V. Inglese, A. Tovar CERN, Geneva, Switzerland M.M. Almeida UFMG, Belo Horizonte, Brazil H. Coppier ESIEE, Amiens, France
	This paper proposes a solution for resources allocation when limited resources supply several clients in parallel. The lack of a suitable limitation mechanism in the supply system can lead to the depletion of the resources if the total demand exceeds the availability. To avoid this situation, an algorithm for priority handling which relies on the Fuzzy Systems Theory is used. The Fuzzy approach, as a problem-solving technique, is robust with respect to model and parameter uncertainties and is well-adapted to systems whose mathematical formulation is difficult or impossible to obtain. The aim of the algorithm is to grant a fair allocation if the resources availability is sufficient for all the clients, or, in case of excess of demand, on the basis of priority lists, to assure enough resources only to the high priority clients in order to allow the completion of the high priority tasks. Besides the general algorithm, this paper describes the Fuzzy approach applied to a cryogenic test facility at CERN. Simulation tools are employed to validate the proposed algorithm and to characterize its performance.

THPPC116	Temperature Precise Control in a Large Scale Helium Refrigerator	controls, operation, experiment, simulation	1331
	Wu,J.H. wu, Q. Li, W. Pan TIPC, BeiJing, People's Republic of China
	Precise control of operating load temperature is a key requirement for application of a large scale helium refrigerator. Strict control logic and time sequence are necessary in the process related to main components including a fine load, turbine expanders and compressors. However control process sequence may become disordered due to improper PID parameter settings and logic equations and causes temperature oscillation, load augmentation or protection of the compressors and cryogenic valve function failure etc. Combination of experimental studies and simulation models, effect of PID parameters adjustment on the control process is present in detail. The methods and rules of general parameter settings are revealed and the suitable control logic equations are derived for temperature stabilization.
	Poster THPPC116 [0.584 MB]

Paper

Title

Other Keywords

Page

TUPPC006

Identifying Control Equipment

database, EPICS, controls, interface

562

M.R. Clausen, M. Möller
DESY, Hamburg, Germany

The cryogenic installations at DESY are widely spread over the DESY campus. Many new components have been and will be installed for the new European XFEL. Commissioning and testing takes a lot of time. Local tag labels help identify the components but it is error prone to type in the names. Local bar-codes and/or datamatrix codes can be used in conjunction with intelligent devices like smart (i)Phones to retrieve data directly from the control system. The developed application will also show information from the asset database. This will provide the asset properties of the individual hardware device including the remaining warranty. Last not least cables are equipped with a bar-code which helps to identify start and endpoint of the cable and the related physical signal. This paper will describe our experience with the mobile applications and the related background databases which are operational already for several years.

Poster TUPPC006 [0.398 MB]

TUPPC090

Digital Control System of High Extensibility for KAGRA

controls, laser, power-supply, detector

794

H. Kashima, N. Araki, M. Ishizuka, T. Masuoka, H. Mukai
Hitachi Zosen, Osaka, Japan
O. Miyakawa
ICRR, Chiba, Japan

KAGRA is the large scale cryogenic gravitational wave telescope project in Japan which is developed and constructed by ICRR. of The University of Tokyo. Hitz Hitachi Zosen produced PCI Express I/O chassis and the anti-aliasing/anti-imaging filter board for KAGRA digital control system. These products are very important for KAGRA interferometer from the point of view of low noise operations. This paper reports the performance of these products.

Poster TUPPC090 [0.487 MB]

THPPC057

Validation of the Data Consolidation in Layout Database for the LHC Tunnel Cryogenics Controls Package

controls, database, PLC, operation

1197

A. Tovar, C. Balle, E.B. Blanco Vinuela, C. Fluder, E. Fortescue-Beck, P. Gomes, V. Inglese, M. Pezzetti
CERN, Geneva, Switzerland

The control system of the Large Hadron Collider cryogenics manages over 34,000 instrumentation channels which are essential for populating the software of the PLCs (Programmable Logic Controller) and SCADA (Supervisory Control and Data Acquisition) responsible for maintaining the LHC at the appropriate operating conditions. The control system specification's are generated by the CERN UNICOS (Unified Industrial Control System) framework using a set of information of database views extracted from the LHC layout database. The LHC layout database is part of the CERN database managing centralized and integrated data, documenting the whole CERN infrastructures (Accelerator complex) by modeling their topographical organization (“layouts”), and defining their components (functional positions) and the relationships between them. This paper describes the methodology of the data validation process, including the development of different software tools used to update the database from original values to manually adjusted values after three years of machine operation, as well as the update of the data to accommodate the upgrade of the UNICOS Continuous Process Control package(CPC).

THPPC072

Superconducting Cavity Quench Detection and Prevention for the European XFEL

cavity, operation, LLRF, coupling

1239

J. Branlard, V. Ayvazyan, O. Hensler, H. Schlarb, Ch. Schmidt
DESY, Hamburg, Germany
W. Cichalewski
TUL-DMCS, Łódź, Poland

Due to its large scale, the European X-ray Free Electron Laser accelerator (XFEL) requires a high level of automation for commissioning and operation. Each of the 800 superconducting RF cavities simultaneously running during normal operation can occasionally quench, potentially tripping the cryogenic system and resulting into machine down-time. A fast and reliable quench detection system is then a necessity to rapidly detect individual cavity quenches and take immediate action, thus avoiding interruption of machine operation. In this paper, the mechanisms implemented in the low level RF system (LLRF) to prevent quenches and the algorithms developed to detect if a cavity quenches anyways are explained. In particular, the different types of cavity quenches and the techniques developed to identify them are shown. Experimental results acquired during the testing of XFEL cryomodules prototypes at DESY are presented, demonstrating the performance and efficiency of this machine operation and cavity protection tool.

THPPC077

A Fuzzy-Oriented Solution for Automatic Distribution of Limited Resources According to Priority Lists

simulation, controls, superconducting-magnet, operation

1246

M. Pezzetti, V. Inglese, A. Tovar
CERN, Geneva, Switzerland
M.M. Almeida
UFMG, Belo Horizonte, Brazil
H. Coppier
ESIEE, Amiens, France

This paper proposes a solution for resources allocation when limited resources supply several clients in parallel. The lack of a suitable limitation mechanism in the supply system can lead to the depletion of the resources if the total demand exceeds the availability. To avoid this situation, an algorithm for priority handling which relies on the Fuzzy Systems Theory is used. The Fuzzy approach, as a problem-solving technique, is robust with respect to model and parameter uncertainties and is well-adapted to systems whose mathematical formulation is difficult or impossible to obtain. The aim of the algorithm is to grant a fair allocation if the resources availability is sufficient for all the clients, or, in case of excess of demand, on the basis of priority lists, to assure enough resources only to the high priority clients in order to allow the completion of the high priority tasks. Besides the general algorithm, this paper describes the Fuzzy approach applied to a cryogenic test facility at CERN. Simulation tools are employed to validate the proposed algorithm and to characterize its performance.

THPPC116

Temperature Precise Control in a Large Scale Helium Refrigerator

controls, operation, experiment, simulation

1331

Wu,J.H. wu, Q. Li, W. Pan
TIPC, BeiJing, People's Republic of China

Precise control of operating load temperature is a key requirement for application of a large scale helium refrigerator. Strict control logic and time sequence are necessary in the process related to main components including a fine load, turbine expanders and compressors. However control process sequence may become disordered due to improper PID parameter settings and logic equations and causes temperature oscillation, load augmentation or protection of the compressors and cryogenic valve function failure etc. Combination of experimental studies and simulation models, effect of PID parameters adjustment on the control process is present in detail. The methods and rules of general parameter settings are revealed and the suitable control logic equations are derived for temperature stabilization.

Poster THPPC116 [0.584 MB]