Run Ranges for L1Cal:
====================

Apr 19, '02 to Jun 19, '02:    151831-157712	|eta| < 0.8 triggered and readout
Jun 19, '02 to Dec 12, '02:    157713-169520	|eta| < 2.4 triggered and readout
Dec 12, '02 to Feb 10, '03:    169521-172358	1/4th of |eta| > 2.4+ICR added in readout
Feb 10, '03 to Mar 27, '03:    172359-174895	full |eta| coverage readout, |eta| < 2.4 triggered
Mar 27, '03 to present:	       >= 174896	full |eta| coverage readout, |eta| < 3.2 triggered


Prescription for Re-Mapping ICR Trigger Towers to Correct EM/FH Towers:
======================================================================

In the normal L1Cal coordinate system, trigger ieta ('teta') goes from
-20 thru +20 with no zero, and trigger iphi ('tphi') runs from 1 thru
32.  Some other systems, notably Level2, use a parallel system which
runs from 0 thru 39 in teta with no gap, and 0 thru 31 in tphi.  I
will use the L1 terminology, taking the absolute values of teta since
the system is symmetric, and assume the user can make the appropriate 
transformation.  One other note is that all trigger towers with |teta|
< 17 correspond to sizes of 0.2x0.2 in eta-phi.  So the central eta of
each tower is easily calculated from its teta and tphi.  Beyond |teta|
= 16, however, the eta granularity and central value changes
arbitrarily.  The correct eta centroids are listed in the caladdress
package in the TrigTowerAddress class.  A further explanation of the
towers labelled |teta| = 19 and 20 follows.

The inter-cryostat region ('ICR') consists roughly of the eta region
0.8 thru 1.5.  This region includes the normal EM and FH cells, which
are formed into trigger towers in the normal 0.2x0.2 scheme with the
correct |teta| values (i.e. in the range 4 thru 7).  These cells,
however, only partially sample a particle shower in this region, due
to dead material.  Therefore, there are also ICR-specific detector 
elements which the CC and EC massless gaps (CCMG and ECMG), and the 
inter-cryostat detector ('ICD').  These signals have been routed to 
BLS boards which also house the far forward LAr cells with |eta| >
3.2.  Because of this routing, these ICD and MG towers appear to be 
at the highest teta values of +/- 19 and 20.  This would imply a large
pseudorapidity, but instead these all correspond to cells at |eta| ~ 1.  
In addition, the layer label for the ICD and MG trigger towers (ie. 
EM vs. HD) has no meaning at L1 for these towers, but just corresponds
to where the signals were able to be output. To get a proper 
interpretation of the calorimeter from L1 towers (ie. more akin to the
ieta-iphi tower breakdown of the precision readout), one needs to 
combine the ICD and MG towers with the partial EM/FH towers in the 
proper |teta| region of 4 thru 7.  The central |eta| of these towers, 
and  their suggested mapping for addition to EM/FH towers near |eta| 
~ 1.0 is given here:

teta	 layer	  |eta|	      map to teta    layer
--------------------------------------------------
19	 EM	  0.95		5		HD
19	 HD	  1.25		7		EM
20	 EM	  0.75		4		HD
20	 HD	  1.05		6		HD

Note that HD = TOT-EM.  This remapping is necessary to permit
triggering on electrons at L1 in the ICR, to get towers in the right
coordinate system so jet ID selections like L1Set fraction remain
efficient in the ICR, and to permit proper triggering on jets and
electrons in this region with reasonable turn-on curves.


Run Ranges for Cal Data Quality:
===============================

2002:		run #		Cal precision readout
================================================================
June     19	157713		multibuffering started
August   15	161972		multibuffering working
December 19	169521(~)	'crate 9' timing problem
				noticeable
2003:
-----------
February 10	172359		'crate 8' energy sharing
				started, coherent noise 
				bursts noticeable
April	 15	175757(~)	last 'crate 9' timing
				problem fixed, coherent noise
				bursts much less noticeable
April	 27	176313(~)	'crate 8' energy sharing
				fixed
June 	 30     178514          last run for summer conferences