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playground:esempio_personale_albertellialighieri1920

Positron driven muon source for a muon collider

Introduction

As far as the muon bunch intensity is concerned, the number of $\mu^{+}\mu^{-}$ pairs produced per positron bunch on target is: $$n\left(\mu^{+}\mu^{-}\right)=n^{+}\rho l\sigma\left(\mu^{+}\mu^{-}\right)$$ The $e^{+}e^{-}\rightarrow\mu^{+}\mu^{-}$ cross section as a function of the positron beam energy is given in following figure.

Positron source

The $e^{+}$ source has to provide trains of 1000 bunches with $5\times10^{11}$ $\frac{e^{+}}{bunch}$ to inject in the Damping Ring at 5 GeV.

Embedded Source

For each positron on the primary 3 mm Be target there are:

  • 0.11 photons hitting the W target
  • 0.65 $e^{+}$ coming out of the 5$X_{0}$ W target.

Beam parameters at the end of the embedded source capture channel are given in the following table.

Parameter Value
$\epsilon_{n,y}$ $7.9 \times 10^{3}$ mm mrad
$E$ $\simeq 190 MeV$
$\Delta_{E}$$4.9 \times 10^{4}$ keV

Nota

Questa è una pagina di prova di utilizzo di Wiki Lab2Go. Il testo, la figura e la tabella riportati sono stati presi dall'articolo scientifico arxiv:1905.05747

playground/esempio_personale_albertellialighieri1920.txt · Ultima modifica: 2019/12/15 13:54 da fausto.casaburo