Beam Energy Measurement at Linear Colliders Using Spin Precession
نویسنده
چکیده
Linear collider designs foresee some bends of about 5-10 mrad. The spin precession angle of one TeV electrons on 10 mrad bend is 23.2 rad and it changes proportional to the energy. Measurement of the spin direction using Compton scattering of laser light on electrons before and after the bend allows determining the beam energy with an accuracy about of 10. In this paper the principle of the method, the procedure of the measurement and possible errors are discussed. Some critical remarks about other methods are given.
منابع مشابه
Full quantum treatment of spin-dependent beam-beam processes at linear colliders
Depolarisation processes at future linear colliders need to be understood as precisely as possible. To that end a theoretical consideration of the spin flip process and its radiative corrections is presented here. The spin flip process contains a divergence and it is useful to repeat the calculation of its transition rate using a coordinate system which makes the physical nature of the divergen...
متن کاملA High Intensity Linear Ee Collider Facility at Low Energy
The huge luminosity increase compared to existing ring colliders is expected by using linear collider concepts. The luminosities of past and existing ee ring colliders have been steadily increased mainly by increasing the beam currents and collision frequencies. The design luminosities of various ee ring colliders are shown in Fig. 1 as function of the beam energy. A main limitation comes from ...
متن کاملUL–NTZ 09/99 The visible effect of a very heavy magnetic monopole at colliders
If a heavy Dirac monopole exists, the light–to–light scattering below the monopole production threshold is enhanced due to strong coupling of monopoles to photons. At the next Linear Collider with electron beam energy 250 GeV this photon pair production could be observable at monopole masses less than 2.5–6.4 TeV in the e+e− mode or 3.7–10 TeV in the γγ mode, depending on the monopole spin. At ...
متن کاملThe visible effect of a very heavy magnetic monopole at colliders
If a heavy Dirac monopole exists, the light–to–light scattering below the monopole production threshold is enhanced due to strong coupling of monopoles to photons. At the next Linear Collider with electron beam energy 250 GeV this photon pair production could be observable at monopole masses less than 2.5–6.4 TeV in the ee mode or 3.7–10 TeV in the γγ mode, depending on the monopole spin. At th...
متن کاملMuon Polarimeter in a Neutrino Factory Decay Ring
Monitoring the muon beam properties in the final stage of the Neutrino Factory (the Decay Ring) is important for the understanding of the beam itself and a crucial piece of information for the downstream physics. The main topics to be assessed are: knowledge of the muon beam energy and polarization, divergence of the beam and beam current. In the framework of the International Design Study for ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2003