Beam Loss Monitoring for LHC Machine Protection
| Autor: | Ewald Effnger, Markus Nagel, C Kurfuerst, Annika Nordt, Eduardo Nebot Del Busto, Eva Barbara Holzer, Christos Zamantzas, C Roderick, V. Grishin, Csaba Hajdu, Jonathan Emery, A Marsili, Bernd Dehning, S. Jackson, Mariusz Sapinski, Marek Misiowiec |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Physics
Large Hadron Collider beam loss Nuclear engineering High Energy Physics::Phenomenology Tevatron Ranging Physics and Astronomy(all) quench protection Collimated light beam instrumentation Magnet Ionization Physics::Accelerator Physics Detectors and Experimental Techniques damage protection machine protection Energy (signal processing) Beam (structure) |
| Popis: | The energy stored in the nominal LHC beams is two times 362 MJ, 100 times the energy of the Tevatron. As little as 1 mJ/cm 3 deposited energy quenches a magnet at 7 TeV and 1 J/cm 3 causes magnet damage. The beam dumps are the only places to safely dispose of this beam. One of the key systems for machine protection is the beam loss monitoring (BLM) system. About 3600 ionization chambers are installed at likely or critical loss locations around the LHC ring. The losses are integrated in 12 time intervals ranging from 40 μs to 84 s and compared to threshold values defined in 32 energy ranges. A beam abort is requested when potentially dangerous losses are detected or when any of the numerous internal system validation tests fails. In addition, loss data are used for machine set-up and operational verifications. The collimation system for example uses the loss data for set-up and regular performance verification. Commissioning and operational experience of the BLM are presented: The machine protection functionality of the BLM system has been fully reliable; the LHC availability has not been compromised by false beam aborts. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|