The Level 2 Experts' Examine


There is another version of the Examine, which was designed for use by Level 2 experts, primarily for system debugging and commissioning. This Examine shows slightly more details in its plots, and it has the ability to select plots that correspond to a particular trigger bit. Link to the instructions here.

These plots are organized in the same way, but also by trigger bits. As of today, the Examine fills the following plots for all triggers, for Trigger Bit 18 and for Trigger Bit 22 (I expect that those numbers will be changed frequently).

Global 

	Object			Histogram		Description
	------			---------		-----------
	Electromagnetic 	Pt			Plots are of electrons that passed
		Objects		eta			the L2 trigger and the specified
				phi			L1 trigger bit.
				eta vs. phi			
				isolation
				EM fraction

	Jets			Pt			Plots are of jets that passed
				eta			the L2 trigger and the specified 
				phi		  	L1 trigger bit.
				eta vs. phi			

	Muons			Pt			Plots are of muons that passed
				eta			the L2 trigger and the specified
				phi		  	L1 trigger bit.
				eta vs. phi			
				quality
				sign			

Workers

	Object			Histogram	 	 Description
	---------------		---------	 	 ---------------
	Calorimeter Jets 	Et		 	 Plots are of jets that are input 
				eta		 	 to L2.  The jets passed the L1 
				phi		 	 trigger bit specified in the 
				eta vs. phi	 	 examine.

	Calorimeter EM 		Et		 	 Plots are of electrons that are input
	       Objects		eta		 	 to L2.  The electrons passed the L1
				phi		 	 trigger bit specified in the
				eta vs. phi	 	 examine.
				isolation
				EM fraction

	Central Muons		number per event	central muons in events that passed specified L1 bit.
				pt			the pt measurement of the central muons (spike at 0)
				eta			~symmetrical about 0, dip at zero 
				phi			~6 spikes (Phi information sometimes gets 
							   lumped to the center of a pad.) 
				eta vs. phi		darker phi bands for the phi spikes	

	Forward Muons		number per event	forward muons in events that passed specified L1 bit.
				pt			the pt measurement of the forward muons (spike at 0)
				eta			~symmetrical about 0, dip at zero
				phi			~6 spikes (Phi information sometimes gets 
							   lumped to the center of a pad.) 
				eta vs. phi		darker phi bands for the phi spikes	


There are some old reference plots for some experts' Examine plots. Linked here are plots from July of 2002 which show events that have been passed by Level 2's EM worker, and plots with events passed by the jet worker .

Past histogram files can also be found in the scratch area on d0ol38, /scratch/trigger_examine.p11.09/data/L2_TrigExpert.root.(date recorded), and viewed with root.


Send comments/corrections to Joe Steele
Last modified: Tues. April 29, 2003