DIPAC2011 - List of Authors (Zamantzas, C.)

Paper

Title

Page

Self Testing Functionality of the LHC BLM System

152

J. Emery, B. Dehning, E. Effinger, A. Nordt, C. Zamantzas
CERN, Geneva, Switzerland

Reliability concerns have driven the design of the LHC BLM system throughout its development, from the early conceptual stage right through the commissioning phase and up to the latest development of diagnostic tools. To protect the system against non-conformities, new ways of automatic checking have been developed and implemented. These checks are regularly and systematically executed by the LHC operation team to insure that the system status after each test is "as good as new". This checks the electrical part of the detectors (ionisation chamber or secondary emission monitor), their cable connections to the front-end electronics, the connections to the back-end electronics and their ability to request a beam abort. During the installation and in the early commissioning phase, these checks proved invaluable in finding non-conformities caused by unexpected failures. This paper will describe these checks in detail, commenting on the latest performance and the typical non-conformities detected. A statistical analysis of the LHC BLM system will also be presented to show the evolution of the various system parameters.

Poster MOPD44 [2.068 MB]

TUOB02

Designing Electronics for Use in Radiation Environments

C. Zamantzas
CERN, Geneva, Switzerland

In this talk, an overview will be provided on the necessary steps a new project will need to take to ensure the requirements in terms of resilience to the dose accumulated and single event effects. Information will be given on the different design options and the available tools designers can employ to augment the tolerance of the system as well as the techniques developed to mitigate the problems that can arise in radiation environments. It will be also shown how the knowledge of the expected fluence and flux, together with the given specifications will dictate the conceptual design, the component choices limited to use, and the required validation and quality assurance through irradiation testing that will be necessary to be undertaken.

Slides TUOB02 [1.250 MB]

TUPD44

LHC Beam Loss Monitoring System Verification Applications

404

E. Fadakis, B. Dehning, S. Jackson, C. Zamantzas
CERN, Geneva, Switzerland

The LHC Beam Loss Monitoring (BLM) system is one of the most complex 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 a feedback of losses to the control room as well as to several systems for their setup and analysis. It has to transmit and process signals from almost 4’000 monitors, and has nearly 3 million configurable parameters. The system was designed with reliability and availability in mind. The specified operation and the fail-safety standards must be guaranteed for the system to perform its function in preventing superconductive magnet destruction caused by particle flux. Maintaining the expected reliability requires extensive testing and verification. In this paper we report our most recent additions to the numerous verification applications. The developments have been made using LabVIEW and CERN custom made libraries and allow the user to connect either directly to the front end computer (FEC) or through a dedicated server.

Paper	Title	Page
MOPD44	Self Testing Functionality of the LHC BLM System	152
	J. Emery, B. Dehning, E. Effinger, A. Nordt, C. Zamantzas CERN, Geneva, Switzerland
	Reliability concerns have driven the design of the LHC BLM system throughout its development, from the early conceptual stage right through the commissioning phase and up to the latest development of diagnostic tools. To protect the system against non-conformities, new ways of automatic checking have been developed and implemented. These checks are regularly and systematically executed by the LHC operation team to insure that the system status after each test is "as good as new". This checks the electrical part of the detectors (ionisation chamber or secondary emission monitor), their cable connections to the front-end electronics, the connections to the back-end electronics and their ability to request a beam abort. During the installation and in the early commissioning phase, these checks proved invaluable in finding non-conformities caused by unexpected failures. This paper will describe these checks in detail, commenting on the latest performance and the typical non-conformities detected. A statistical analysis of the LHC BLM system will also be presented to show the evolution of the various system parameters.
	Poster MOPD44 [2.068 MB]

TUOB02	Designing Electronics for Use in Radiation Environments
	C. Zamantzas CERN, Geneva, Switzerland
	In this talk, an overview will be provided on the necessary steps a new project will need to take to ensure the requirements in terms of resilience to the dose accumulated and single event effects. Information will be given on the different design options and the available tools designers can employ to augment the tolerance of the system as well as the techniques developed to mitigate the problems that can arise in radiation environments. It will be also shown how the knowledge of the expected fluence and flux, together with the given specifications will dictate the conceptual design, the component choices limited to use, and the required validation and quality assurance through irradiation testing that will be necessary to be undertaken.
	Slides TUOB02 [1.250 MB]

TUPD44	LHC Beam Loss Monitoring System Verification Applications	404
	E. Fadakis, B. Dehning, S. Jackson, C. Zamantzas CERN, Geneva, Switzerland
	The LHC Beam Loss Monitoring (BLM) system is one of the most complex 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 a feedback of losses to the control room as well as to several systems for their setup and analysis. It has to transmit and process signals from almost 4’000 monitors, and has nearly 3 million configurable parameters. The system was designed with reliability and availability in mind. The specified operation and the fail-safety standards must be guaranteed for the system to perform its function in preventing superconductive magnet destruction caused by particle flux. Maintaining the expected reliability requires extensive testing and verification. In this paper we report our most recent additions to the numerous verification applications. The developments have been made using LabVIEW and CERN custom made libraries and allow the user to connect either directly to the front end computer (FEC) or through a dedicated server.