OWG meeting 29-Aug-2007

Overview

This is a special one-topic meeting whose goal is to try to understand the event size given the recent simulation results on occupancies, especially in the FDC. Note that the 2002 Hall D design document lists a 4kB average event size, although it is possible that the FDC itself may take 4kB (or even more). The average event size affects the design of the DAQ system in a number of ways, so this needs to be understood sooner rather than later. Fortunately the DAQ architecture is highly scalable, so accomodating higher event sizes and event rates is not a big problem.

The goal of this meeting is to:

1. Understand what we know and do not know about event size, occupancies, etc.
2. Devise a plan to learn what we need to learn

Agenda

• Brief intro and overview - Elliott W
• Channel counts, etc.- Fernando B
• Latest simulation results on occupancies - David L
• Constraints from VME and Network Interfaces - Dave A
• Recent results on extracting time from ADC data - Simon T[1]
• Design of 125 MHz FADC, FPGA capabilities, etc. relevant for event size - Gerard V

Time/Location

1:00pm Wed 29-Aug-2007 Cebaf Center F224

To phone in, send me your telephone number and I'll call you.

Next Meeting

• TBD (some of us will be out of town the first week of Sep, and OECM review is second week of Sep)