PETRA Electronics Update

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PETRA ElectronicsUpdate

• Gary Boorman
• 5th April 2005

G.Boorman_at_rhul.ac.uk
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Overview

• Signal Integrator
• DAQ cards
• VME system
• Future Work

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Signal Integrator

• A card has been developed to integrate the
  signals from the PMT and photodiodes
• Integrates using RC network based around a fast
  op-amp.
• Uses an integrate signal from the Trigger
  Fanout or a DIO card and is read out by an ADC
  card in the PC
• At DESY (Feb 05) we failed to get it to work
  operator fault! Its been tested again at RHUL
  (using ADC and DIO signals as at DESY) and works
  as expected

Integrator card signals
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DAQ Cards

• All of the data acquisition is timed from the
  LaserTrig II card. This signal is delayed and
  fanned-out using both TrigFan I and counters on
  the DAQ cards.
• A new DAQ card (PCI based) is being investigated
  in order to reduce the amount of inter-card
  communication

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VME System

• A new VME sub-rack and master processor (running
  Linux) is currently being setup and tested
• The whole DAQ will move into this VME sub-rack
  including ADC/DAC cards as well as the existing
  LaserTrig II, integrator cards etc
• LabVIEW will run under Linux, but it is envisaged
  the final DAQ software will be in C/C

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Future Work

• The new laser at PETRA the current LaserTrig II
  card could drive the Surelite Continuum laser,
  with only minimal changes to the cards output
  drivers
• Integration of control and acquisition on to the
  new VME system this will include purchase of a
  100 or 200MS/s multi-channel ADC card.
• Continuing work on the DAQ system remaining
  with Labview at the present but will migrate to
  C/C later