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Group EB R&D meeting, Nov 18, 2004

Tests of the SLAC ADC in the PMT Scanning Setup

Typical result before Nov 16:

• adc1_fits.pdf
• delay_20041115_pad24.pdf

Latest scan result or ADC #1 (Nov 16, 2004):

• Pedestal (linear): adc1_20041116_ped_lin.pdf
• Pedestall (log): adc1_20041116_ped_log.pdf
• Signal (lin): adc1_20041116_sig_lin.pdf
• Signal (log): adc1_20041116_sig_log.pdf

Summary of picosec/count calibration for available channels:

• calibration_20041115.pdf
• calibration_20041116.pdf
• calibration_summary.pdf

Use multiple ADC samples to suppress noise?

• trace_20041112.gif (high rate, high intensity)
• trace_20041112_many.gif (high rate, high intensity)
• trace_20041117.gif (two hits in memory)
• trace_20041119.gif (current configuration)

Current configuration, example resolution for pad 24 (sigma=97ps):

• pad24_nominal_20041117.gif

Plan: hope to reproduce IEEE Rome plots (used Philips) for RICH04 - but use SLAC ADC

• Philips TDC: mcp16_pad14_ggfit_sigma.eps.gif
• Philips TDC: mcp16_pad24_ggfit_sigma.eps.gif