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Contents

• 1 Introduction
• 2 Generic DAQ
• 3 Harpo prototype

1 Introduction

This section remind the actual status and provide the methods we use to update them.

2 Generic DAQ

Figure: Generic architecture

Online architecture is sometime done by a single framework (HESS, XDAQ) and sometime split into 3 compounds:

• Owner graphical interface
• Slow control: «SLC» (TANGO, ENX) wich is mainly a state machine manager.
• Data aquisition: «DAQ» (NARVAL) wich is mainly a multiplexer also called event builder.

Detector usually own 2 kind of links:

• A synchronous link to the slow control
• An asynchronous fast link to data aquisition

3 Harpo prototype

Figure: Harpo architecture

As the Calice's experiment, we drive the detector using the DAQ.

• We only have a synchronous link to the detector.
• Most of the embedded server functionalities have been exported to the client (DAQ).

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