1. 12th May 2008AIDA FEE Report1 AIDA Front end electronics Report May 2008 Progress Data compression Plan for prototype delivery

2. 12th May 2008AIDA FEE Report2 Progress Investigating Buffer and FADC PCB layout Checking detector connection board routing. Specification for utility interface - Metronome Power supply (50W) options – 12v distribution FADC interface DDR to parallel conversion

3. 12th May 2008AIDA FEE Report3 Compression Max data rate for FEE Gbit link 60MB/sec. Waveforms are the major contributor to this demand. Compress the waveforms as they are transferred between memories in the FPGA

4. 12th May 2008AIDA FEE Report4 Low noise Noisy Periodic Compression for AIDA Compared lossless methods. 8 sample data sets, 3 types. Each file 128MBytes, compressed in 2000 word “chunks”.

5. 12th May 2008AIDA FEE Report5 Several techniques looked at. Varying results, all data dependent. Home-grown method as good as others for this data. Knowledge of data format/structure. Compression for AIDA

6. 12th May 2008AIDA FEE Report6 Minimum+Offset (MO), Data Dictionary (DD), No Compression (NC). MO usually best, DD best for noisy data. Sometimes NC best. All improved when bit- packed. Recommend Minimum+Offset with fallback to No Compression Compression for AIDA

7. 12th May 2008AIDA FEE Report7 Milestones for Prototype FEE delivery Complete Specification : –1 st July 2008 => low risk Complete Schematic and PCB layout : –1 st Aug 2008. => medium risk Deliver 6 FEE cards ( 6 weeks ) : –15 th Sept 2008 => low risk Complete Prototype VHDL : –1 st November 2008 => Medium risk Commission FEE cards : –1 st December 2008 => High risk Design ASIC Mezzanine –1 st Aug 2008. => medium risk Deliver 6 ASIC Mezzanines –15 th Sept 2008 => low risk Complete Kapton board : –1 st Nov 2008 => low risk

8. 12th May 2008AIDA FEE Report8