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LLEA N SAMUEL ADVISOR: DAN LEVIN CALIBRATION CHAMBER ANALYSIS BENEDICT COLLEGE 19 th JULY, 2007

LLEA N SAMUEL ADVISOR: DAN LEVIN CALIBRATION CHAMBER ANALYSIS BENEDICT COLLEGE 19 th JULY, 2007. MONITORED DRIFT TUBES. Used for muon detection in the LHC. Monitored Drift Tubes. Gold plated Tungsten wire Voltage=3080V Radius=25 mumeters Stretched by 350g of tension Aluminum tube:

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LLEA N SAMUEL ADVISOR: DAN LEVIN CALIBRATION CHAMBER ANALYSIS BENEDICT COLLEGE 19 th JULY, 2007

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  1. LLEA N SAMUEL ADVISOR: DAN LEVIN CALIBRATION CHAMBER ANALYSIS BENEDICT COLLEGE 19th JULY, 2007

  2. MONITORED DRIFT TUBES Used for muon detection in the LHC

  3. Monitored Drift Tubes • Gold plated Tungsten wire • Voltage=3080V • Radius=25 mumeters • Stretched by 350g of tension • Aluminum tube: • r (inner)= 1.46 cm • r (outer) =1.5 cm • Pressure =3 bar • Gas Mixture: Argon=93.0%, CO2=7.0%

  4. What do we analyze and why Changes in the gas concentration can alter the drift velocity of the electrons in the drift tube Therefore it is necessary to note the changes that can occur if the mixture within the tubes do change The calibration chamber helps us do this

  5. Calibration Chamber • The calibration chamber is connected to the pipes that carry the air mixture in and out of the drift tubes • Some of the gas from both the in pipe and the out pipe is bled into the calibration chamber and analyzed

  6. What do we analyze and why Water Contamination Noryl is used at both ends of the drift tube to help protect the sense wire and also to pass on the information gathered to the scintillator Noryl, however, has a certain amount of water in it, which can contaminate the gas mixture. Water cannot be removed from the noryl otherwise cracking will occur.

  7. What do we analyze and why • We also need to look at the different ways an increase in the concentration of either the Argon or the Carbon Dioxide gas can affect the RT function

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