bml-d 001 monitoring paolo iengo atlas rpc group napoli ( m. alviggi, v. canale, m. caprio, g....
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BML-D 001 Monitoring
Paolo Iengo
Atlas RPC Group Napoli(M. Alviggi, V. Canale, M. Caprio, G. Carlino, F. Conventi, R. de Asmundis,
M.Della Pietra, D. della Volpe, P.I., S.Patricelli, L.Romano, G. Sekhniaidze)
Overview
Plot & Fit V-I Historical Trends of Fit Parameter Monitoring of Current, HV, Temp. etc Conclusions
Plot V-I
FIT: I(V) = a+bV V<4000 Volt
I(V) = a+bV +k (exp(V/c) –1) V>5000 Volt
Plot V-I
< 1 July > 1 July
Historical Trend of Linear Slope
T = 20 exp(-(T-20)) = 1/12
Historical Trend of Exp. Slope
5 – 15 June Currents
CAEN H.V.
60 µA
11 kV
24 June – 8 JulyCurrents
CAEN H.V.
Currents
Temperatures Gas Flow
134 A
SF6Isob.
Currents
Isob. Flow
CAEN H.V.
Currents 9 – 16 July
Currents
CAEN H.V.
Temperatures
Conclusions
Behavior of BML-D 001 quite “stable” Increasing current on one layer due to the
problem on isobutane Delay between HV and “regime” current needs
more investigation Continuous Monitoring of HV, Current, Gas
Flow & Env. Parameters is Essential