Status of E-906/Drell-Yan with Fermilab and DOE and schedule going forward
CLC status - Fermilab
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1 CLC status Yuri Oksuzian on behalf of CLC group
Transcript of CLC status - Fermilab
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CLC status
Yuri Oksuzian on behalf of CLC group
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Summary
Extended PMT’s lifetime
CLC cross-sections
Plans for shut down
Usual CLC vs COT linearity check
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PMT’s lifetimeUpper plot presented in March 2003
Suggests:
Start replacing PMT’s in 0.5/fb
Most PMT’s are dead in 2/fb
Instead we increased HV and prolonged PMT’s lifetime
Saved many $’s )-1L (pb0 200 400 600 800 1000 1200 1400 1600 1800 2000
)-1L (pb0 200 400 600 800 1000 1200 1400 1600 1800 2000
SPP
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CLC xsection changes
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Offline CLC eff xsection
Online CLC eff xsection
-2%
-4%
Store #
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Plans for Shut Down
Replace all the PMT’s with the new ones.
Out of 44 bases we replaced so far, none have shown any problems
Need to replace 3 more bases from the old batch
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COT vs CLC before
Data collected in 08/18/08-09/18/08
X axes -> Lum
Y axes -> SL8 current
Fit up to 150E30. Extrapolation to guide the eye.
/ ndf 2! 11.91 / 16Prob 0.7502
p0 3.505337! 0.003201
p1 0.04! 23.03
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/ ndf 2! 11.91 / 16Prob 0.7502
p0 3.505337! 0.003201
p1 0.04! 23.03
SuperLayer_8_Cot_vs_Lumi
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hSuperLayer_8_Cot_vs_Lumi
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COT vs CLC before
X axes -> Lum
Y axes -> SL8/Lum. Full range is ±4.2%, the CDF lum uncertainty.
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SuperLayer_8Cot2Lumi_vs_Lumi
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hSuperLayer_8Cot2Lumi_vs_Lumi
