Jochen FrühaufCBM-Collaboration Meeting
12.-16.04.2010
Status PADI PCBs Readout System FEET-PADI & CAEN HPTDC
Active LVDS Splitter Results
Readout System FEET-PADI/FEET-GET4 & ROC Overview Status
Outlook
2Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010
PADI II 4 PCBs @ China 2 PCBs @ India 1 PCBs @ Heidelberg (Sebastian Manz / ROC Setup) 3 PCBs @ GSI (3 PCBs not fully equipped)
PADI III 2 PCBs @ Rossendorf (CAEN Setup) 2 PCBs @ Heidelberg (Ingo Deppner / CAEN Setup) 9 PCBs @ GSI (6 PCBs not fully equipped)
30 PADI II & 30 PADI III are here @ GSIo PCBs are not available at the moment
(one PCB is equipped with 2 PADIs => 8 Channel)
3Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010
2 CAEN HPTDCs V1290 one TDC for leading edge and one TDC for trailing
edge =>it is necessary to split the output signals of
PADI problems with passive splitting leaded to an
active solution tests with 1:10 LVDS-Splitter
(Clock Distributor 2, Karsten Koch)
4Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010
5
Pulse Generator
Trigger Logic
LVDS LVTTL1:10
LVDS Splitter
1:10 LVDS Splitter
Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010
Attenuator
VME-Readout
Reference Signal
Dead Timelock
TDC A TDC B
Trigger
FEET-PADI
pssplitterTDC 342
4822
pssplitter 20 psTDC 5.27 35 ps typical from HPTDC manual
From reference signal splitinto two channels of TDC
222,
2splitterTDCPADIleadSystem
psSystem22222 5.39205.2720
psPADIlead 20,
6Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010
=>developed PCB with 8x1:2 splitter for Feet-PADI
8 x 1:2 LVDS Splitter (MAX9174) 100Ω impedance controlled PCB 1 PCB for 1 FEET-PADI 30 PCBs are ordered
delivery date 16.04.2010(not equipped!)
Input PADISignals
Output for TDC A
Output for TDC B
70mm
7Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010
system tests in Heidelberg with HD-RPC (Ingo Deppner) will be used next Beam time
possible that all “Test-RPCs” will have the same readout system => good for comparison of the different RPCs
LVDS splitter for FEET-PADI will be available soon
8Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010
9Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010
CLOSY2 (Karsten Koch) Clock Generator (250MHz, 156.5MHz, Sync Pulse)
3x Clock Distribution2 (Karsten Koch) FEET-PADI (Mircea Ciobanu) FEET-GET4 (Holger Flemming/Harald Deppe) R2F (Holger Flemming)
(Adapter between FEET-GET4 & ROC) ROC (KIP Heidelberg)
10Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010
2 full systems are available for tests 1x @ GSI 1x @ KIP Heidelberg
only a few communication tests are done
11Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010
no Input – Signals for FEET-PADI Msg:5 Roc:0 Epoch2:01000000
Msg:5 Roc:0 Epoch2:00000000Msg:5 Roc:0 Epoch2:01000000Msg:5 Roc:0 Epoch2:00000000Msg:5 Roc:0 Epoch2:01000000Msg:5 Roc:0 Epoch2:01000000Msg:5 Roc:0 Epoch2:00000000Msg:5 Roc:0 Epoch2:01000001Msg:5 Roc:0 Epoch2:00000001Msg:5 Roc:0 Epoch2:01000000Msg:5 Roc:0 Epoch2:00000000Msg:5 Roc:0 Epoch2:00000000……..
Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010 12
24 times Msg:5 Roc:0 Epoch2:01000000 Msg:5 Roc:0 Epoch2:00000000
followed by 1 time Msg:5 Roc:0 Epoch2:01000001
Msg:5 Roc:0 Epoch2:00000001 Bit for “CLOSY SYNC PULSE” Data GET4 Nr.:0 and Nr.:1
amount of Epoch messages & Sync Pulse message are consistent
Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010 13
with 50mV / 10ns Input Signals for FEET-PADI CH1/CH8
Msg:6 Roc:0 Get4:01 Chn:3 Edge:1 Ts:7c43aMsg:6 Roc:0 Get4:00 Chn:0 Edge:0 Ts:784c0Msg:6 Roc:0 Get4:01 Chn:3 Edge:1 Ts:7c47cMsg:6 Roc:0 Get4:00 Chn:0 Edge:1 Ts:7c438Msg:5 Roc:0 Epoch2:01000000Msg:6 Roc:0 Get4:00 Chn:0 Edge:1 Ts:7c47aMsg:6 Roc:0 Get4:01 Chn:3 Edge:0 Ts:0851eMsg:5 Roc:0 Epoch2:00000000Msg:6 Roc:0 Get4:01 Chn:3 Edge:0 Ts:08560Msg:6 Roc:0 Get4:00 Chn:0 Edge:0 Ts:08511Msg:6 Roc:0 Get4:01 Chn:3 Edge:1 Ts:084fc…………
Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010 14
data shows hits in the used channel timestamp counters of GET4 are increasing
up to the next “Epoch Message” and afterwards these counters are reseted
different error messages and external sync events in the data stream only for input signals in the 2nd GET4 chip no error or ext. sync messages for the 1st chip
crosstalk in the 2nd GET4 Chip only from Channel 0,1,2 to Channel 3
Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010 15
modification in the FPGA code of the ROC include timestamp counters, system messages
GO4 analysis testing setup test Or-Output of PADI test I2C Interface of FEET-PADI for threshold
adjustment
16Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010