L3/CERN, 高能物理實驗組的介紹

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L3 Collaboration

L 3 &%3B! (The physics of L 3 ) HISTORY OF ELEMENTARY PARTICLES

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; i i. i’ . .,. .

y L3 DETECTOR

MAGNET COIL ACClSS 311AI T :

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2 PHOTON TAGGING DETECTORS ELECTROMAGNETIC SHOWER COUNTER IQCOI TIME EXf’fiNSlON CHAMBER

1. Fbt%!iRl~%?ii% (The Magnet and Supper t Structures >

El(Z) WF?Rflfl#EP&l---8Octant

Monitoring System) m?$?@if~Ooctant@~@~F_W ( a l i g n m e n t ) 9 #@@E~3OB*U~ 0 ( m(g )

U\’ l a s e r (c) and Cosmics (X) a g r e e wit]> O p t o - m e c h a n i c a l a l i g n m e n t

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Chamber Gain Test

-ai - 2 % at E = 1 GeV

UE

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ltYYs?iElillJrp :

u=,,

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6GO 24cm length EGSivX Single Cr\/stal Front Area 6 q 4x4cm_o3x3cm

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. _{X-Energy (MC:“)}

5. li&iiBi!$l# (The Vertex Chamber >

A---M O N T E C A R L O T R A N S V E R S E A---M O A---M E N T U A---M

p____-R E S O L U T I O N

6. S ( iE ) 3%RBE%i%B (The Luminosity Monitor >

Muon Chambers.Hadron Calorimeter,BGO,TEC

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VAX 880095%

LEPICS - 1988

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3090-180E

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m(f) L 3 #@$Q$j7&@ (Offline Computing System)

LEPltlET. ESIIET-I.25

ELECTRON

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2. r’/e rejection: meowed to be !&:6’

3. Oolilz pair rejection: TEC-Be-e’ BGO= y , e

Example: e’i-Z”-a~-rr”

l 355 l

AT -

-I00

GE\'

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,nn

-decay

(1)The L3 T e c h n i c a l P r o p o s a l (2)The L3 E x p e r i m e n t

(3)Parameters o f L 3 D e t e c t o r

ti!&@ : The L3 Administration and Communi-cation Group, CERN, Geneva, S.vitzer-land 0