Evaluation of different photodetector types for an ILC polarimeter

✍ Scribed by Christian Helebrant

• Book ID: 103857795
• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 280 KB
• Volume: 610
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2009.05.126

✦ Synopsis

At the International Linear Collider (ILC) (ILC Reference Design Report, 2007 /http://www.linearcollider.org/ rdrS [1]) the polarization of the electron and positron beams needs to be measured with as yet unequaled precision of DP/PE0.25%. The key element of the polarimeter will be the precise detection of Cherenkov light from Compton scattered electrons. The poster /http://ndip.in2p3.fr/ndip08/Poster/P3/66-Helebrant.pdfS [1]) deals with the choice of a suitable photodetector (PD). In a recently assembled test facility various types of PDs have been checked. Results are presented with a special focus on the linearity of the device, since this is expected to be the limiting factor on the precision of the polarization measurement at the ILC.