AR1BL conditions:

AR1BL Current Best:
	this is quite self explanitory.  It was our current best clock noise 		
	plot as of the date listed, and it is still reflective of the best 		
	results we are getting (although they have gotten a bit better, but not 	
	enough to necessitate putting up a new plot).  this is on the module, 		
	with copper tabs attached, and with no cooling plate.
	
AR1BL Gnd Tab Sensitivity:
	Here we were investigating the seinsitivity of the noise to the number 		
	of ground connectins that are made from the analog ground to the space 		
	frame.  Each Copper tab is about 1 inch wide, and in total, there are 		
	seven that can be connected (two on each corner and one right under the 	
	data connector).  Here we see that the difference between connecting all 	
	seven and connecting only two (the one under the data conector and on of 	
	the corner tabs on the opposite end of the board) is small.
AR1BL Noise Off Module
	This is a graphical representation of the Noise as described in "Straw 		
	Noise" below.  Here AR1BL is off the module.

AR1BL Noise On Module
	This is as above but AR1BL is on the module with tabs attached and no 		
	cooling plate.
	
AR1BL Test Pulse In Out
	This is quite simply a comparison of when the test pulse components 		
	(meaning the resistors which connect the test pulse outputs of the 		
	DTMROCs to the inputs of the ASDBLRs) are on the board or not, giving a 	
	picture of how the test pulse contributes to the baseline noise.

AR1BL Typical 300 kHz plot
	This was taken with AR1BL on the module with all tabs attached and no 		
	cooling plate.  We now understand the lower rates in positions 9-11 to 		
	be due to the shorter anode wires in those positions (go to 			
	Straw_Noise.pdf on this page for a graphical representation of this 		
	effect with noise instead of 300kHz rate) where the channels connect to 	
	straws in the first nine layers.  

AR1BL Unterminated Data Cable
	Here we show the result of what happens when a second data cable is 		
	plugged into the patch panel but is not plugged into anything at the 		
	other end.  This effect goes away when the offending cable is either 		
	unplugged from the patch panel or is plugged into something with the 		
	proper termination.  It should be noted that the noise coming from the 		
	cable is a conducted noise through the patch panel and not a radiative 		
	noise coming from the cable itself.  There is no difference in the noise 	
	level if the unterminated cable is draped over the module or if it is 		
	pulled off to the side, away from the module.

AR1BL Vdd 2.50 vs 2.20
	Here we simply show the difference between operating the DTMROCs at 		
	2.50V or 2.20V.  This gave us a lower clock noise with AR1FL but it does 	
	not appear to do so with AR1BL.  These are both on the module with no 		
	cooling plate.

AR1BL With Without Cu Tape
	Here we show the difference between operating AR1BL on the module with 		
	copper tape running from analog ground to the space frame in seven 		
	locations (as described above in the comment for "Gnd Tab Sensitivity") 	
	or none.  We can see that even though there is not much sensitivity to 		
	the total number of ground tab connections, it is certainly important to 	
	make at least a few connections.

No Cu Tape/
	This directory contains pictures of the threshold scans of AR1BL on the 	
	module with no copper tape.
	
Straw Noise
	This is a graphical representation of the noise (not the usual clock 		
	noise quoted in many other plots on this page!)	for AR1BL.  Here what I 	
	am calling the noise comes from the following (entirely the work of 		
	Antoni Munar in this case):  We take a threshold scan, normalize it, and 	
	fit it to 1 minus the interal of a gaussian.  We then quote the value of 	
	sigma for this fit as our noise.  You can see that the noise in the 		
	straws from the first nine layers is lower than the rest.  This can be 		
	attributed to the fact that these straws have shorter wires than the 		
	rest.  

With Cu Tape
	This Directory contains Threshold scan pictures for AR1BL on the module 	
	with copper tape.