2–6 Feb 2009
Chamonix
Europe/Zurich timezone
DISCLAIMER “The Chamonix workshop was an open exchange of views and opinions. All the presentations made at the workshop are available here. The views expressed in individual presentations do not necessarily represent those of the CERN management.”

Bus bar joints stability and protection

3 Feb 2009, 18:05
25m
Le Majestic (Chamonix)

Le Majestic

Chamonix

Speaker

Arjan Verweij

Description

A defective bus connection between two dipole magnets was the primary cause of the incident in sector 34 on September 19th. I will show how this could have happened, i.e. how a highly resistive joint has caused a thermal runaway and burned (or opened) before the QPS threshold was reached. In the second part of the talk I will present the new detection limits for the QPS upgrade of the RB and RQ circuits, required to avoid similar thermal runaways in the future.

Primary author

Arjan Verweij

Presentation materials