ICALEPCS2013 - List of Authors (Jackson, S.)

Paper

Title

Page

Real-Time System Supervision for the LHC Beam Loss Monitoring System at CERN

242

C. Zamantzas, B. Dehning, E. Effinger, J. Emery, S. Jackson
CERN, Geneva, Switzerland

The strategy for machine protection and quench prevention of the Large Hadron Collider (LHC) at the European Organisation for Nuclear Research (CERN) is mainly based on the Beam Loss Monitoring (BLM) system. The LHC BLM system is one of the most complex and large instrumentation systems deployed in the LHC. In addition to protecting the collider, the system also needs to provide a means of diagnosing machine faults and deliver feedback of the losses to the control room as well as to several systems for their setup and analysis. In order to augment the dependability of the system several layers of supervision has been implemented internally and externally to the system. This paper describes the different methods employed to achieve the expected availability and system fault detection.

MOPPC139

A Framework for Off-line Verification of Beam Instrumentation Systems at CERN

435

S. Jackson, C. Roderick, C. Zamantzas
CERN, Geneva, Switzerland

Many beam instrumentation systems require checks to confirm their beam readiness, detect any deterioration in performance and to identify physical problems or anomalies. Such tests have already been developed for several LHC instruments using the LHC sequencer, but the scope of this framework doesn't extend to all systems; notably absent in the pre-LHC injector chain. Furthermore, the operator-centric nature of the LHC sequencer means that sequencer tasks aren't accessible by hardware and software experts who are required to execute similar tests on a regular basis. As a consequence, ad-hoc solutions involving code sharing and in extreme cases code duplication have evolved to satisfy the various use-cases. In terms of long term maintenance, this is undesirable due to the often short-term nature of developers at CERN alongside the importance of the uninterrupted stability of CERN's accelerators. This paper will outline the first results of an investigation into the existing analysis software, and provide proposals for the future of such software.

THPPC119

Software Architecture for the LHC Beam-based Feedback System at CERN

1337

L.K. Jensen, M. Andersen, K. Fuchsberger, S. Jackson, L. Ponce, R.J. Steinhagen, J. Wenninger
CERN, Geneva, Switzerland

This paper presents an overview of beam based feedback systems at the LHC at CERN. It will cover the system architecture which is split into two main parts – a controller (OFC) and a service unit (OFSU). The paper presents issues encountered during beam commissioning and lessons learned including follow-up from a recent review which took place at CERN

Poster THPPC119 [1.474 MB]

THCOCB03

Fast Automatic Beam-based Alignment of the LHC Collimation System

1430

G. Valentino, R.W. Aßmann, R. Bruce, S. Jackson, S. Redaelli, B. Salvachua, D. Wollmann, C. Zamantzas
CERN, Geneva, Switzerland
N.J. Sammut
University of Malta, Information and Communication Technology, Msida, Malta

Maximum beam cleaning efficiency and LHC machine protection is provided when the collimator jaws are properly adjusted at well-defined distances from the circulating beams. The required settings for different locations around the 27 km long LHC rings are determined through beam-based collimator alignment, which uses feedback from Beam Loss Monitoring (BLM) system. After the first experience with beam, a systematic automation of the alignment procedure was performed. This paper gives an overview of the algorithms developed to speed up the alignment and reduce human errors. The experience accumulated in four years of operation, from 2010 to 2013 is reviewed.

Slides THCOCB03 [13.293 MB]

Paper	Title	Page
MOPPC062	Real-Time System Supervision for the LHC Beam Loss Monitoring System at CERN	242
	C. Zamantzas, B. Dehning, E. Effinger, J. Emery, S. Jackson CERN, Geneva, Switzerland
	The strategy for machine protection and quench prevention of the Large Hadron Collider (LHC) at the European Organisation for Nuclear Research (CERN) is mainly based on the Beam Loss Monitoring (BLM) system. The LHC BLM system is one of the most complex and large instrumentation systems deployed in the LHC. In addition to protecting the collider, the system also needs to provide a means of diagnosing machine faults and deliver feedback of the losses to the control room as well as to several systems for their setup and analysis. In order to augment the dependability of the system several layers of supervision has been implemented internally and externally to the system. This paper describes the different methods employed to achieve the expected availability and system fault detection.

MOPPC139	A Framework for Off-line Verification of Beam Instrumentation Systems at CERN	435
	S. Jackson, C. Roderick, C. Zamantzas CERN, Geneva, Switzerland
	Many beam instrumentation systems require checks to confirm their beam readiness, detect any deterioration in performance and to identify physical problems or anomalies. Such tests have already been developed for several LHC instruments using the LHC sequencer, but the scope of this framework doesn't extend to all systems; notably absent in the pre-LHC injector chain. Furthermore, the operator-centric nature of the LHC sequencer means that sequencer tasks aren't accessible by hardware and software experts who are required to execute similar tests on a regular basis. As a consequence, ad-hoc solutions involving code sharing and in extreme cases code duplication have evolved to satisfy the various use-cases. In terms of long term maintenance, this is undesirable due to the often short-term nature of developers at CERN alongside the importance of the uninterrupted stability of CERN's accelerators. This paper will outline the first results of an investigation into the existing analysis software, and provide proposals for the future of such software.

THPPC119	Software Architecture for the LHC Beam-based Feedback System at CERN	1337
	L.K. Jensen, M. Andersen, K. Fuchsberger, S. Jackson, L. Ponce, R.J. Steinhagen, J. Wenninger CERN, Geneva, Switzerland
	This paper presents an overview of beam based feedback systems at the LHC at CERN. It will cover the system architecture which is split into two main parts – a controller (OFC) and a service unit (OFSU). The paper presents issues encountered during beam commissioning and lessons learned including follow-up from a recent review which took place at CERN
	Poster THPPC119 [1.474 MB]

THCOCB03	Fast Automatic Beam-based Alignment of the LHC Collimation System	1430
	G. Valentino, R.W. Aßmann, R. Bruce, S. Jackson, S. Redaelli, B. Salvachua, D. Wollmann, C. Zamantzas CERN, Geneva, Switzerland N.J. Sammut University of Malta, Information and Communication Technology, Msida, Malta
	Maximum beam cleaning efficiency and LHC machine protection is provided when the collimator jaws are properly adjusted at well-defined distances from the circulating beams. The required settings for different locations around the 27 km long LHC rings are determined through beam-based collimator alignment, which uses feedback from Beam Loss Monitoring (BLM) system. After the first experience with beam, a systematic automation of the alignment procedure was performed. This paper gives an overview of the algorithms developed to speed up the alignment and reduce human errors. The experience accumulated in four years of operation, from 2010 to 2013 is reviewed.
	Slides THCOCB03 [13.293 MB]