R&D Project 2:
Integration of a low-mass silicon pixel detector system for particle tracking

Research Objective

A key towards the minimization of material budget in hybrid pixel systems is the reduction of external components and service chips that present-day front end for pixel detectors need for a correct operation. On chip cap-less regulators that avoid external filtering capacitors are employed in chips for mobile phones and other commercial System on Chips, but their use in particle detectors front-end, where the specifications on noise and radiation hardness are particularly demanding, remain to be assessed. Low-power transmitter coupled to ultra-light aluminum based cables allowing high speed electrical transmission over moderate distances (a few meters) would also be useful to avoid extra electro-optical components in zones where the material budget must be minimized. The design of such components and their integration on a realistic front-end demonstrator is therefore the natural complement to the low-power front-end cells with increased functionality developed in the ULISI project. Based on this chip, a full low-mass module prototype will be developed in ULISINT.


INFN Torino (A. Rivetti, activity leader)


Task Nr. Task name Participants
P2/T1 Low-power radiation-tolerant power regulators + data transmitters INFN
P2/T4 Design of a low-mass front-end module INFN
P2/T2 Low-mass, fine pitch Al cables for off-chip electrical transmission INFN
P2/T3 Design and test of a full front-end ASIC with those circuits INFN


Tasks 2012 2013 2014
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Design and test of a full-size front-end ASIC X X X X X X X X X X X 3
Low-power radiation-tolerant components X X X 1                
Low-mass fine pitch aluminum cables X X X X X X X 2        

  1. Low-power radiation-tolerant power regulators and data transmitters
  2. Production of low-mass fine pitch aluminum cables
  3. Design and test of a full-size front-end ASIC with the developed circuits


Report on the feasibility of cap-less front-end ASIC, the performance of a low-power, low-mass high speed transmission system based on Al cable, and the design of a final full-size front-end module.

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-- JohannMHeuser - 31 Jan 2012
Topic revision: r3 - 02 Feb 2012, JohannMHeuser
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