TPC Status
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TB 07.11.06 Peter Glässel, Heidelberg 1 TPC Status
description
TPC Status. Pre-Commissioning. Phase 1 results see Oct Forum Phase 2 (till Nov 19): ‘endurance test’ for sectors, 2 days, 2 at a time Finalized cabling Better known gas composition Full DCS functionality: monitoring and storing of parameters (i.e. FEE temperatures) - PowerPoint PPT Presentation
Transcript of TPC Status
TB 07.11.06 Peter Glässel, Heidelberg 1
TPC Status
TB 07.11.06 Peter Glässel, Heidelberg 2
Pre-Commissioning
Phase 1 results see Oct Forum
Phase 2 (till Nov 19):‘endurance test’ for sectors, 2 days, 2 at a time
Finalized cabling
Better known gas composition
Full DCS functionality: monitoring and storing of parameters (i.e. FEE temperatures)
ISEG HV: monitoring currents
Prepare sectors for transport
2/3 done
Sector covers (cooled)
TB 07.11.06 Peter Glässel, Heidelberg 3
Main results in phase 2
FEE life: no single failure
Gain curves, gain margin A-side
HV trips:Only seen with ISEG: fast hardware trip
Mainly seen for OROCs
regardless of trip current settings
No clear correlation with HV, time (conditioning?)
Modify time constant: with 15 M series resistor only one trip since 5 days on C-side
Gain spikes (high gain on a pad row): go away with time
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Summary – IROC S/N
1390
1400
1410
1420
1430
1440
1450
1460
A00 A01 A02 A03 A04 A05 A06 A07 A08 A09 A10 A11 A12 A13 A14 A15 A16 A17
V n
om
(V
olt
)
IROCs Vnom
Mea
sure
men
ts n
ot
avai
lab
le
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Summary – IROC S/N
0
10
20
30
40
50
60
70
80
90
100
A00 A01 A02 A03 A04 A05 A06 A07 A08 A09 A10 A11 A12 A13 A14 A15 A16 A17
S/N
(A
DC
co
un
t)
IROCs S/N (Max measured)
Mea
sure
men
ts n
ot
avai
lab
le
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Summary – OROC S/N
1680
1690
1700
1710
1720
1730
A00 A01 A02 A03 A04 A05 A06 A07 A08 A09 A10 A11 A12 A13 A14 A15 A16 A17
V n
om
(V
olt
)
OROC's Vnom
Mea
sure
men
ts n
ot
avai
lab
le
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Summary – OROC S/N
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
A00 A01 A02 A03 A04 A05 A06 A07 A08 A09 A10 A11 A12 A13 A14 A15 A16 A17
S/N
(A
DC
co
un
t)
OROCs S/N (Max measured)
Mea
sure
men
ts n
ot
avai
lab
le
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A00 - GainSECTOR A00 gain curves
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OROC A00 exchange
Wire broken
150 V below max HV tested
Decision to exchange OROCPreparations in parallel to phase 2 commissioning C-side: remove electronics (1 sector only), cabling, FEE frames
Yellow platform in non-standard asymmetric fashion (keep I-bars on A-side)
Re-test spare OROC before exchange
Time schedule till end Nov: 10 days delay
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TPC transport to UX2
Technical questions for transport resolvedTransport document http://www.physi.uni-heidelberg.de/~glassel/TPC/TPC-transport/TPC-transport.pdf
Except maybe weather: T < 10 deg?
Preparations start late Nov, actual transport 4.12.?
Last minute technical problem for installation:Connection rails are incompatible with BSF
need to be modified, redesign done, calculations pending
Critical part taking large forces (5.5 t vertical)
Load test needed
Have to be in place before transport: time schedule risk
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Spares, reference
Complete A-side phase 2 summary under https://webh06.cern.ch/alice-tpc-commissioning/documents/TPC_2nd_phase_summaryAside.ppt
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A00 / OROC with broken wire(s)
Signal injected into cathode wires
4 FECs had several channels damaged
OROC A00 pulser readout after wire broke
