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T: Fachverband Teilchenphysik
T 64: Halbleiterdetektoren: Forschung und Entwicklung 4
T 64.8: Vortrag
Mittwoch, 6. März 2013, 18:30–18:45, GER-007
Application of Diamond Based Beam Loss Monitors — •Maria Hempel1,2,3, Tobias Bär3,4, Elena Maria Castro Carballo2, Wolfgang Lohmann1,2, and Rüdiger Schmidt3 — 1Technische Universität Brandenburg, Cottbus , Deutschland — 2DESY-Zeuthen, Zeuthen, Deutschland — 3CERN, Genf, Schweiz — 4Universität Hamburg, Hamburg, Deutschland
The LHC has an operational stored energy of 130MJ per beam. Only a small percentage of beam losses in the LHC equipment can damage material or lead to magnet quenches. Therefore, it is important to monitor different types of beam losses, e.g. scattering on residual gas particles, UFOs, collisions and injection losses. A detailed understanding of beam loss mechanisms is necessary to reduce them and ensure save operation. Two different beam loss monitors are installed in the LHC tunnel: ionization chambers and diamond sensors. Ionization chambers trigger a beam dump if beam losses exceed a certain threshold. They have a time resolution of 40um (half LHC turn) which is not sufficient to resolve bunch-by-bunch beam losses. Diamond sensors have a nanosecond time resolution and can therefore detect bunch-by-bunch beam losses. This time resolution allows an analysis of various types of beam losses and an understanding of the mechanisms. For the first time beam loss intensities were measured bunch-by-bunch caused by different origins of losses. Beam loss measurements using diamond sensors will be presented. The results are compared to simulations and good qualitative agreement was found. The potential of diamond sensors for LHC and experiment applications will be discussed.