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Flavio Dal Corso - INFN Padova 1OPERA coll. meeting - Hamburg 3 July 2004
RPC & XPC Electronics Status
Front End Boards (FEBs) Controllers HV system Crates & Racks
Flavio Dal Corso - INFN Padova 2OPERA coll. meeting - Hamburg 3 July 2004
FEB prototype
Flavio Dal Corso - INFN Padova 3OPERA coll. meeting - Hamburg 3 July 2004
FEB block schematic
Flavio Dal Corso - INFN Padova 4OPERA coll. meeting - Hamburg 3 July 2004
Front End Discriminator
LVDS receiver Very cheap High density
High speed Moderate CMRR (~2
V)
Flavio Dal Corso - INFN Padova 5OPERA coll. meeting - Hamburg 3 July 2004
Discriminator PerformancesDiscriminator Linearity
y = 0,9658x + 11,338
-400
-300
-200
-100
0
100
200
300
400
-400 -200 0 200 400
Nominal Thr (mV)
Act
ual
Th
r (m
V)
Linearity Residuals
-1,00
-0,50
0,00
0,50
1,00
-400 -300 -200 -100 0 100 200 300 400
mV
mV
Slope Distribution
0
5
10
15
20
-0,9
82
-0,9
80
-0,9
78
-0,9
76
-0,9
74
-0,9
72
-0,9
70
-0,9
68
-0,9
66
-0,9
64
-0,9
62
Co
un
ts
Offset Distribution
0
5
10
15
-1,5
0,5
2,5
4,5
6,5
8,5
10
,5
12
,5
14
,5
16
,5
18
,5
mV
Co
un
ts
=0.003
=4.1 mV
Flavio Dal Corso - INFN Padova 6OPERA coll. meeting - Hamburg 3 July 2004
RPC Strip’s Signals (First measurements done underground)
strip signal
-0,1
-0,05
0
0,05
0,1
0,15
0,2
1 921 1841 2761 3681 4601 5521 6441 7361 8281 9201
ground signal
-0,08
-0,06
-0,04
-0,02
0
0,02
0,04
0,06
0,08
0,1
0,12
1 919 1837 2755 3673 4591 5509 6427 7345 8263 9181
Ground connection not the best possible (not yet the final layout).
Ground noise well within CM range.
Difference signal immune from ground noise
difference
-0,1
-0,05
0
0,05
0,1
0,15
1 229 457 685 913 1141 1369 1597 1825 2053 2281 2509 2737 2965
Flavio Dal Corso - INFN Padova 7OPERA coll. meeting - Hamburg 3 July 2004
FEB status
Prototype (almost) finished. 10 prototypes will be mounted in the
next few weeks, to be tested at the INFN-Napoli test stand with the Controller.
Tender for the mass production (~500 boards) awaiting for test results.
Flavio Dal Corso - INFN Padova 8OPERA coll. meeting - Hamburg 3 July 2004
Controller status
Prototype finished, without “Mezzanine”.
Tested at INFN Napoli with a FEB emulator.
Flavio Dal Corso - INFN Padova 9OPERA coll. meeting - Hamburg 3 July 2004
HV system
3 SYS-127 (available). 33 (4 ch.) positive modules (available). 11 (4 ch.) negative modules (available). 8 (~40 ch. each) I-meter (home made by
INFN-Frascati), almost ready.
Flavio Dal Corso - INFN Padova 10OPERA coll. meeting - Hamburg 3 July 2004
RPC & XPC cable layout
3 + 6 boards x plane
6 + 6 boards x plane
Flavio Dal Corso - INFN Padova 11OPERA coll. meeting - Hamburg 3 July 2004
Racks layout
16 Racks (old MACRO racks), with modification (water cooling and power management). Works in progress.
Flavio Dal Corso - INFN Padova 12OPERA coll. meeting - Hamburg 3 July 2004
Crates layout(for one spectrometer)
RADIATORERADIATORE
RADIATORERADIATORE
Power Management
Power Management
SYS 127 +
CONTROLLER
RPC
RPC
RACK 6 RACK 8
I Meter
RADIATORERADIATORE
RADIATORERADIATORE
RPC
RPC
RPC
RPC
I Meter
I Meter
I Meter
SYS 127 -
Power Management
Power Management
RACK 5 RACK 7
SLOW CONTROL
RADIATORE RADIATORE
RADIATORE RADIATORE
Power Management
Power Management
XPC
CONTROLLER
RPC
RPC
I Meter
I Meter
I Meter
I Meter
SLOW CONTROL
RACK 4RACK 2
RADIATORE
SYS 127 +
RADIATORE
RADIATORE RADIATORE
RPC
RPC
RPC
XPC
TIMING
Power Management
Power Management
RPC
RACK 3RACK 1
Flavio Dal Corso - INFN Padova 13OPERA coll. meeting - Hamburg 3 July 2004
Custom Crates(FEBs and Controllers)
Standard VME crates, with custom backplane.
4 crates for XPC 24 crates for RPC 4 crates for Controllers
Flavio Dal Corso - INFN Padova 14OPERA coll. meeting - Hamburg 3 July 2004
Custom Crates
Flavio Dal Corso - INFN Padova 15OPERA coll. meeting - Hamburg 3 July 2004
Custom Crates
Flavio Dal Corso - INFN Padova 16OPERA coll. meeting - Hamburg 3 July 2004
All the crates and backplanes are already available; mounting in progress.