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SUMMARY:Polarisation and beam energy measurement at linear e+e- colllider
DTSTART;VALUE=DATE-TIME:20140224T103000Z
DTEND;VALUE=DATE-TIME:20140224T105000Z
DTSTAMP;VALUE=DATE-TIME:20260910T164313Z
UID:indico-contribution-93@indico.inp.nsk.su
DESCRIPTION:Speakers: Benedikt Vormwald (DESY)\nThe International Linear C
 ollider (ILC) is a future e⁺e⁻ collider at the energy frontier. Its ph
 ysics goals are clearly focused on precision measurements at the electrowe
 ak scale and beyond. Beam polarisation and beam energy are two important p
 arameters\, which need to be measured and monitored to unprecedented possi
 ble precision. In this talk we will present the concepts of polarisation a
 nd energy measurement according to the baseline design of the Technical De
 sign Report of the ILC.\nTwo Compton polarimeters per beam line will deter
 mine the beam polarisation. The anticipated precision of this measurement 
 of ∆P/P = 2.5 × 10⁻³ puts highest demands on detector alignment and 
 linearity. We will comment on recent detector developments as well as dete
 ctor calibration\, which allows for meeting this challenging design goal.\
 nThe beam energy will be measured before and after the interaction point t
 o a targeted precision of ∆E/E = O(10⁻⁴). We will discuss both plann
 ed independent concepts in this talk: A noninvasive energy spectrometer ba
 sed on beam position monitors is planned to be operated before the interac
 tion region. Behind the interaction region\, a synchrotron radiation imagi
 ng detector will allow not only for measuring the beam energy\, but also g
 ives access to the beam energy spread of the beam after collision.\n\nhttp
 s://indico.inp.nsk.su/event/0/contributions/93/
LOCATION:
URL:https://indico.inp.nsk.su/event/0/contributions/93/
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