Commissioning and optimization of the LHC BLM system

E. B. Holzer, B. Dehning, E. Effinger, J. Emery, C. F. Hajdu, S. Jackson, C. Kurfürst, A. Marsili, M. Misiowiec, E. Nebot Del Busto, A. Nordt, C. Roderick, M. Sapinski, C. Zamantzas, V. Grishin

Research output: Contribution to conferencePaper

Abstract

Due to rapid progress with the LHC commissioning in 2010, set-up beam intensities were soon surpassed and damage potential was reached. One of the key systems for machine protection is the beam loss monitoring (BLM) system. Around 4000 monitors are installed at likely or critical loss locations. Each monitor has 384 associated beam abort thresholds (12 integrated loss durations from 40 μs to 84 s for 32 energy intervals). A single integrated loss over threshold on a single monitor aborts the beam. Simulations of deposited energy, critical energy deposition for damage or quench and BLM signal response backed-up by control measurements determined the initial threshold settings. The commissioning and optimization of the BLM system is presented. Test procedures were used to verify the machine protection functionalities. Accidental magnet quenches were used to fine-tune threshold settings. The most significant changes to the BLM system during the 2010 run concern the injection, the collimation and the beam dump region, where hardware changes and threshold increases became necessary to accommodate for increasing beam intensity.

Original languageEnglish
Pages487-491
Number of pages5
Publication statusPublished - Dec 1 2010
Event46th ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, HB 2010 - Morschach, Switzerland
Duration: Sep 27 2010Oct 1 2010

Other

Other46th ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, HB 2010
CountrySwitzerland
CityMorschach
Period9/27/1010/1/10

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Holzer, E. B., Dehning, B., Effinger, E., Emery, J., Hajdu, C. F., Jackson, S., Kurfürst, C., Marsili, A., Misiowiec, M., Nebot Del Busto, E., Nordt, A., Roderick, C., Sapinski, M., Zamantzas, C., & Grishin, V. (2010). Commissioning and optimization of the LHC BLM system. 487-491. Paper presented at 46th ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, HB 2010, Morschach, Switzerland.