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

Session

Beam loss mechanisms

6 Jun 2012, 14:15

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

Conveners

Beam loss mechanisms

• Daniel Schulte (CERN)

Description

Experience of existing and previsions for future accelerator complexes, addressing three types of beam losses and their potential impacts:
- Operational beam losses: quasi continuous losses (e.g. beam gas induced) that form the loss background that has a major impact on the radiation environment in the accelerator.
- Equipment failure induced beam losses, which – if ill controlled – may lead to major damage of the accelerator structures.
- Transient beam losses, or beam losses related to changing environment (temperature drift, ground motion, ufo, others).

42. Status of the ASTA Facility Machine Protection System at Fermilab

Arden Warner (Fermilab)

06/06/2012, 14:15

17. Beam loss mechanisms in Flash/Desy

Alexander Kaukher (DESY)

06/06/2012, 14:30

The Free Electron Laser in Hamburg (FLASH) is based on a linac with superconducting RF technology. The linac is designed to produce high power electron beams. Loss of only a fraction of the beam can damage the machine. Machine Protection System of FLASH controls modes of operation and prevents dangerous conditions. The Dark Current of the FLASH gun is the largest source of lost particles....

18. Halo formation and losses in CLIC

Dr Helmut Burkhardt (CERN)

06/06/2012, 15:00

The talk will shortly review our knowledge of halo production by standard processes and in particular beam-gas scattering. Analytic estimates and simulation tools (PLACET+HTGEN) exist and have been used to predict the halo for the drive beam, LINAC and beam delivery systems of CLIC. This allows to show that halo and losses from halo should be rather low in CLIC under design conditions and...

19. Beam loss experience from CTF3

Frank Tecker (CERN)

06/06/2012, 15:30

CTF3 tests the drive beam generation for CLIC, as well as the two-beam acceleration. Although the beam power and the damage potential are considerably lower than at CLIC, it can give important insight to considerations for the machine protection at CLIC. The presentation will show the experience at CTF3 for different loss mechanisms and their consequences, as well as the results of a...

20. Beam loss mechanisms : observation from the LHC

Laurette Ponce (CERN)

06/06/2012, 16:20

After 2 years of operation pushing the beam parameters, we gained some experience on the different beam loss mechanisms observed in the LHC. Some of these mechanisms are expected, like the losses during injection process, some others have been discovered with the higher intensities like the UFOs. This talk will address the three types of losses (operational, equipment failure and transient...

21. Overview of Failure Mode Studies for ILC and CLIC

Dr Andrea Latina (CERN)

06/06/2012, 16:50

Failures in the ILC and in the CLIC can lead to beam loss, or even damage the machine. Also failures that do not lead to beam loss can affect the luminosity performance, in particular since some time is required to recover from them. During the last years several different failures scenarios have been investigated, and their impact on the machine performance has been being studied. At this...

22. Failure studies at CLIC main Linac and Beam Delivery System

Carlos Omar Maidana

06/06/2012, 17:20

The CERN TE-MPE group has the mission to develop and maintain the systems to protect machine components from damage caused by ill controlled conditions. Various failure scenarios were studied and the potential damage these failures could cause to the machine structures was estimated. First results of the beam response to kick induced failures in the main LINAC and in the beam delivery system...