ECS in the Outer Tracker

1
ECS in the Outer Tracker

• Ad Berkien
• Tom Sluijk
• Albert Zwart

2
Outer Tracker

• 3 OT Stations T1,T2,T3
• Each OT Station consists of
• 4 planes XUVX

3
Station Frames

• Each station consists of 4 movable units
  (curtains), each containing two layers (X/U or
  V/X), so
• 2 x 7 F Module ? 28 FE boxes
• 2 x 2 S1 Modules ? 4 FE boxes
• 2 x S2 Modules ? 2 FE boxes
• 2 x S3 Modules ? 2 FE boxes

4
Overview of Services

• Summary of services
• HV
• LV
• Optical fibers (data)
• TFC (fast control)
• ECS (slow control)

Distribution Boxes
Control Boxes
5
Control Boxes

• Two Control Boxes per detector curtain, one
  serves the top (18) Front-End Boxes and one
  serves the bottom (18) Front-End Boxes.
• The Control Box contains
• TTCrx
• To supply the TFC signals.
• TTC Broadcast Decoder
• To supply the L0-Reset and Test-Pulse signals.
• ADCs for the monitor signals.
• LVDS drivers.
• SPECS Slave
• Two I2C ports for the Front-End Boxes
• control GOL and OTIS chips
• I2C port for TTCrx and delay chips
• JTAG port for the ADCs.
• The connections from Control Box to the FE
  Electronics is proposed to be made with LVDS
  signals via twisted-pair shielded cables.

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Functional scheme Control Box

• The SPECS mezzanine board provides two main
  functionalities
• ECS provides JTAG, I2C and parallel interface
• decodes TTC broadcast

Start design of Control box as soon as possible,
needs detailed technical documentation
(functional scheme, layout etc.)
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ECS Part of the Control Box
Control Box
Front-End Box (9x)
I2C
Front-End Box (9x)
I2C
SPECS slave
TTCrx

• ECS interface
• Two I2C ports for the Front-End Boxes
• control GOL and OTIS chips
• I2C port for TTCrx and delay chips
• JTAG port for the ADCs.

local I2C
ADCs
JTAG
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Connection between Control Box and Front-End Box
Front-End Box
Control Box
I2C output from SPECS routed (5m) to FE
Electronics 2.5V LVDS driver/receiver
(SN65LVDS1/2) used
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TTC-Broadcast Decoding

• Signals to decode
• L0-Reset
• Test-Pulse
• Example
• In addition to the decoder logic, 4 bits of the
  output register (EXT_REG 310) of the SPECS
  slave are used to enable/disable 4 Test-Pulse
  outputs

Brcst70
decoder
L0-Reset gt Brcst700x44
D
Q
BrcstStr
Test-Pulse gt Brcst700x10
Clock
Ck
10
SPECS Master-to-Slave connection

• The Outer Tracker uses 24 SPECS SLAVE mezzanine
  boards in the cavern (mounted in the control
  boxes)
• Each SPECS SLAVE mezzanine has a connection to
  the SPECS-Master in control room (one SPECS
  master in principle sufficient, in practice?)
• The SPECS master/slave connection
  (detector/control-room connection) must be
  galvanic isolated (optically coupled) optical
  fibres are preferred

11
Time schedule

• Start design of Control box as soon as possible,
  before end of July at the latest
• needs detailed technical documentation
  (functional scheme, layout and geometry etc.)
• LINUX drivers for SPECS needed for ECS Software
  design
• Production of Control-box prototypes in September
  (for Outer Tracker Station Medium-Scale Test)
• min. 2 SPECS SLAVE mezzanine boards available
• 1 SPECS Master
• cables (CAT5, fibers?)
• software (drivers for LINUX)
• Medium Scale Test of one detector curtain with 20
  Front-End Modules in November
• final validation of SPECS for the Outer Tracker