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User name R. Michaels
Log entry time 23:05:58 on February 19, 2011
Entry number 347735
This entry is a followup to: 347726
keyword=suggested helicity check for the non-exhausted
Here's an idea to check helicity. It occured to me on the way home.
Plug in the 960 Hz master pulse (called T_settle) into the trigger
supervisor as trigger 9, say. The DAQ will run at 960 Hz with no
deadtime and we can check the TIR bits (and ADC) which read the helicity.
This can be cross-checked with the ring buffer that we rely on normally.
As an example of what you *might* see: clean TIR data, nothing wrong with
helicity, but some "glitchiness" in the ring buffer (scaler).
To fully benefit from this test, a rapid offline analysis would be
A copy of this log entry has been emailed to: lselvy