Workshop on Machine Protection, focusing on Linear Accelerator complexes : 6th - 8th June, 2012

Session

Operational aspects

8 Jun 2012, 09:00

30/7-018 - Kjell Johnsen Auditorium (CERN)

Conveners

Operational aspects

• Marc Ross (Fermilab)

Description

• Operational aspects (commissioning, intensity ramp, machine availability)
• Risk assessment: management and tools

34. RF breakdown recovery

Walter Wuensch (CERN)

08/06/2012, 09:00

The breakdown rate for the CLIC main linac rf system must be less than 3x10-7/pulse/m in order to ensure that less than 1% of all machine pulses lose luminosity due to beam deflections caused by the breakdowns. What’s known so far about the statistics of breakdown is reviewed and an operational scenario for reacting to breakdown on following pulses is described.

35. Clic Intensity rampup

Michael Jonker (CERN)

08/06/2012, 09:30

The permit based machine protection system of CLIC depends on the measured performance of the machine during the previous cycle. This presentation addresses the bootstrap procedure which, starting from safe beams, stepwise increases the beam intensities.

36. 'AvailSim' - Simulating the Operation and Maintenance of an Accelerator Complex

Marc Ross (Fermilab)

08/06/2012, 10:00

AvailSim is a Monte-Carlo simulation tool that uses Excel and Matlab to show a timeline of operation of a large accelerator complex. The simulation uses and table listing all key accelerator components with mean time to fail (MTBF) and mean time to repair (MTTR) data taken from data recorded at DESY, Fermilab and SLAC from the 1990's. The model includes the full segmentation of the machine so...

37. Reliability of the CERN Beam Interlock System: Past, Present and Future

Dr Benjamin Todd (CERN)

08/06/2012, 10:50

The Beam Interlock System (BIS) is a high-speed, high-dependability interlock system used throughout the CERN accelerator complex. It has been designed to provide the required protection level whilst having a minimal impact on machine availability. This talk explains the methods used to predict the reliability of the BIS during the design phase, the observed system performance with respect...

38. Risk assessment in Linac-4, management and tools

Andrea Apollonio (Vienna University of Technology (AT))

08/06/2012, 11:20

In high energy accelerators the need for Protections Systems is essential to protect the machines from possible failures. As the beam energy increases, beam-induced damage can cause serious consequences in terms of repair costs and down-time of the accelerator. Hence the risk associated to a failure has to be estimated for all possible failure scenarios. The present work shows the adopted...

39. A Systems Engineering Approach to Machine Protection

Mr Kelly Mahoney (TJNAF)

08/06/2012, 11:50

Jefferson Lab accelerators include the 1MW CEBAF electron machine as well as the high intensity Free Electron Laser. Borrowing risk management practices from the military, aerospace and chemical processing industries, Jefferson Lab manages a graded approach to identify and manage risk presented by beam operations. Constraints are then incorporated in to system level requirements across...