ACD Trending from AcdVetoCal runs

The AcdVetoCal script pulses the charge injection strobe in increasing values of tci_dac and mesures the veto_dac values where the veto line fires
We only fit the curve in the low range (0-23 tci_dac) of the charge injection. We keep track of the following values.

• Offset: the tci_dac value that would be need to fire the veto if the veto_dac were set to 0
• Slope: tci_dac / veto_dac.
• MSE: Mean square error on the points

Note that the veto_dac step size is about the same as the tci_dac step size. This means that the curves are quite step-like. The test points here are the "CPT" tests list in the full list of ACD test phases

Comments:

• At phase 12 we installed on the lat and used timing for LATTE.
• At phase 14 we started running with LICOS, this changed the timing.
• At phase 16 we increased the trg_seq delay by 9 counts to trq_seq=0x59.
• It looks like this script is using a value of hitmap_delay that isn't right.

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Plot of values	Comments	Plot of diff W.R.T. reference
	Intercept of veto v. tci_dac curve. Range: 0 - 80
	Slope of veto v. tci_dac curve. Range: -2. - 0
	MSE of points in veto v. tci_dac curve. Range: 0. - 40

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Eric Charles

Last modified: Thu Oct 12 18:15:34 PDT 2006