Bonn 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 64: Strahlenhärte von Halbleiterdetektoren II
T 64.8: Vortrag
Donnerstag, 18. März 2010, 18:30–18:45, HG ÜR 6
Application of Diamond and Sapphire Sensors in Beam Halo Monitor for FLASH — •Alexandr Ignatenko1,2, Hans Henschel1, Wolfgang Lange1, Wolfgang Lohmann1, and Sergej Schuwalow1 — 1DESY, Zeuthen, Platanenallee 6 — 2NC PHEP BSU, Minsk, Bogdanovich Str. 153
Safe electron beam dumping at FLASH is supported by a beam halo monitoring system. The sensors positioned inside the beam pipe have to withstand high radiation doses. We used 300 µm thick pCVD diamond and 500 µm thick single crystal sapphire sensors of 12×12 mm2 area. Samples of such sensors have been irradiated in a high intense electron beam at S-DALINAC and found to tolerate doses up to 10 MGy with moderate signal degradation.
During the upgrade of the FLASH beam dump line in the summer 2009 a module currying 4 diamond and 4 sapphire sensors was installed in the beam pipe, commissioned and successfully operated.
In the talk the system is described and the results from the data taken in the "9 mA run" in September 2009 are given.