STAR HPTDC Prototyping

Lloyd Bridges, Geary Eppley, Ted Nussbaum, Jo Schambach

HPTDC Workshop, 13. May 2003

2

RHIC at BNL

HPTDC Workshop, 13. May 2003

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TOF Tray Design

HPTDC Workshop, 13. May 2003

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RPCDETECTOR

AMPLIFIERDISCRIMINATOR

TDRC

TRIGGER

BUFFER

TRAY LEVEL DATA PROCESSING

TRAY LEVEL MULTIPLICITY

DATA FORMATTINGDATA TRANSFER

24

24 channels RPC + 1 TFEE + 1 TDIG

FIBER LINK

MULTIPLICITY

COMMANDS

TIMING

DATA + COMMAND FORWARDING

STAR TOF: TOP LEVEL ELECTRONICS

PC

24 channels RPC + 1 TFEE + 1 TDIG

24 channels RPC + 1 TFEE + 1 TDIG

24 channels RPC + 1 TFEE + 1 TDIG

24 channels RPC + 1 TFEE + 1 TDIG

24 channels RPC + 1 TFEE + 1 TDIG

24 channels RPC + 1 TFEE + 1 TDIG

TDC DATA

MULTIPLICITY

CONFIG/STATUS

TFEE

TDIG TCPU

TMIT

DAQ

SERIAL BUS

HPTDC Workshop, 13. May 2003

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FRONT END ELECTRONICS( 1 OF 24 CHANNELS )

PREAMP

PREAMP

ADC AMPTHS4502

DISCRIM.MAX9601

THRESHOLD(common to allchan., bipolar)

RPCTO TDC AND TRIGGER

FROM THRESHOLD DAC

CAMAC

PREAMP BYPASS

PREAMP:MAX3760 “ORIGINAL”MAX3664 < PWR, COSTMAX3266 HIGHER SPEED

POWER:~ 385 mW / ch@ +4.5V, -8.5V

TEMERATURE SENSOR

HPTDC Workshop, 13. May 2003

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HPTDC Workshop, 13. May 2003

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PROTOTYPE TDC ELECTRONICS

INTEGRATOR(4 CHAN)

THRESHOLDDAC

HPTDC 1

HPTDC 2

ADC(4 CHAN)

Multiplicity Input

CAN BUS

TEMPERATURE(TDC, FEE)

MICROPIC18F8720

PLDEP20K200

RS-232

JTAG

8 LVDS CHANNELS FROMFEE DISCRIMINATOR

4 DIFF. ANALOG CHANNELSFROM BUFFER AMP

INTERNAL /EXT OSC

POWER AT 6VREGULATED@ 5.0V, 3.3V,2.5V

MULTIPLICITYDAISY CHAIN

SERIAL BUS

HPTDC Workshop, 13. May 2003

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HPTDC Workshop, 13. May 2003

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0

5000

10000

15000

20000

25000

30000

35000

40000

0 500 1000 1500 2000

Bin #

Eve

nt

cou

nt

Code Density Data @ 25ps, 20M points

HPTDC Workshop, 13. May 2003

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Integral Non-Linearity @ 25 ps

-20

-15

-10

-5

0

5

0 200 400 600 800 1000

Bin #

INL

co

rrec

tio

n (

Bin

s)

HPTDC Workshop, 13. May 2003

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Time Difference Measurement Test SetupPULSERwithINTERNALTRIGGER

40 MHZCLOCK

HPTDC

DELAY

TDC PROTOTYPE

Output

Output

“Delay”

HP8131A

HPTDC Workshop, 13. May 2003

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Raw Time Difference

0200400600800

10001200140016001800

480 490 500 510 520

Cable delay, (Bin #)

Eve

nt

cou

nts

HPTDC Workshop, 13. May 2003

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INL Corrected Time Difference

0

500

1000

1500

2000

2500

3000

480 485 490 495 500 505 510 515 520

Cable delay, INL-corrected (Bin #)

Eve

nt

cou

nts

rms = 32.2 ps

HPTDC Workshop, 13. May 2003

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RMS of Time Difference Measurements

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

0 10 20 30 40 50 60

Cable delay (ns)

rms p

eak w

idth

(p

s)

Mean RMS = 33.9 ps

Implies Single Channel RMS = 24.0 ps

HPTDC Workshop, 13. May 2003

15

Raw Time Difference with FEE

0

50

100

150

200

250

140 145 150 155 160 165 170 175 180

Cable delay w/ FEE, Relative Delay (Bin #)

HPTDC Workshop, 13. May 2003

16

INL-Corrected Time Difference with FEE

0

100

200

300

400

500

600

700

800

140 145 150 155 160 165 170 175 180

Cable delay w/ FEE, INL-corrected Relative Delay (Bin #)

rms = 40.3ps