FEE Development for CBM-TOF

Jochen Frühauf EE Meeting 21.05.12

What do we hope to achieve?

1.  new PCBs •  Goal:

•  test and specify PADI VI & PADI VII & GET4 1.0

•  cleanup the system –  less cables –  efficient CLK & power

distribution

2.  Beamtime 2012 •  test new ASICs in beam

Setup @ COSY November 2011

HD-MRPC design

HD- MMRPC fully symmetric and differential active area 32 x 27 cm2

strips 32 strip / gap 7 / 3 mm glass type float glass glass thickness 0.5 mm number of gaps 8 gap width 220 µm impedance 100 Ω

pick-up electrode (green) Kapton foil (orange) HV electrode (blue) glass plates (light blue) HV electrode (blue) Kapton foil (orange) pick-up electrode (green) honeycomb st.

M4 plastic screw

Pickup electrode

transmission line with 2 x 50 Ω imp-edance to ground

impedance of 100 Ω connector to preamp. (PADI) or twisted pair cable

cross section of the HD counter

RPC in gas tight aluminum box

RPC side view

Slide: Ingo Deppner 19th CBM collaboration meeting 26 – 30 March 2012

PCB Development (PADI 3)

Power Distribution

DAC

Connector

Connector

Connector

LVDS OUTPUT SIGNALS

Advantages •  direct connection to RPC

•  short lines for RPC Signal •  power distribution

•  less cables inside of the detector •  SPI DAC

•  allows differential signal transmitting •  Diff. to SE converter on board

Connector

DAC Control Signals

Connector

PADI 3 PADI 3

DAC

Connector

Connector

PADI 3 PADI 3

DAC

Connector

Connector

PADI 3 PADI 3

DAC

Connector

Connector

PADI 3 PADI 3

•  Layout finished •  available summer 2012

Beamtime: August 2012

RPC: current prototype active area: 27 cm x 32 cm Box size: 72 cm x 52 cm Strips: 32 el. channel 64 FPGA TDCs 2x

Box: 72 cm x 53 cm

5 cm

Connector

Connector

PADI

Connector

DAC Con

.

PADI

Connector

PADI

Connector

DAC Con

.

PADI

SP

I Pow

er

Con

nect

or

Outlook Beamtime: October 2012 (PADI6 / PADI7)

5 cm

Connector

PADI

Connector

DAC

Con

.

Connector

PADI

Connector

DAC

Con

.

Power Distribution

Connector

RPC: real size demonstrator active area: 53 cm x 52 cm Box size: 80 cm x 60 cm Strips: 52 el. channel 104

PCB Development (ROC V2 & GET4 V1.0)

Add-on Boards for GET4 •  16 Channel / Board •  CLK & Power distr. on base board

•  clean up the system •  save CLK cables

SYSCORE V2

Intermediate Step till ROC V3 is ready •  prove working principle of Power & CLK distribution •  should be ready till summer

The End

Thank you for your attention

Timing RPC with: Ø  active area: A = 120 m2

Ø  counter time resolution: σT ~ 50 ps Ø  rate capability: R ~ 0.5 – 25 kHz/cm2

Ø  granularity: ΔA ~ 4 – 50 cm2

Ø  operation mode: free running

Rate profile (Au-Au(minimum bias) at E=25 GeV/A)

kHz/cm2 A. Kiseleva, P.-A. Loizeau

Towards 150m2

Slide:

Ingo Deppner

17th CBM collaboration meeting

04 - 08 April 2011