Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010

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)


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)


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,


=>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


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



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)


2 full systems are available for tests 1x @ GSI 1x @ KIP Heidelberg

only a few communication tests are done


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


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…………


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


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


Documents

Jochen Frühauf CBM-Collaboration Meeting 12.-16.04.2010