Nov. 13, 1995
Phil Schlabach

muon code changes in v7.11

This is what I remember about 7.11. All changes were in C$MUO and the
C$INC/C$DIC files associated with C$MUO unless otherwise noted.

This version of the reconstruction was the first that properly runs on the
Alpha and UNIX platforms (if I remember correctly).

Packages
********

Changes to the d-to-e reconstruction
====================================
Bank changes:  CMPE/CMXE changed, CMUE/CSXE unchanged
A status word was added to the upper 16 bits of the logical ID (see 
C$MUO:CMSTUP.CDF which unpacks the status from the LID and describes the
bits.)

Some speed up in db access -
CMX/CMP got an order of magnitude speed up.

Post-production processing -
Lots of reporting that is appropriate for production (or single run) processing
is annoying for multi-run processing. Much of this can now be disabled.

Changes to the track-stub linking
=================================
Bank changes:  energy summary/link banks added

Energy summary/link banks have been added. These banks save the energies
used in the muon energy clustering - summary bank - or pointers to the entries 
used - link bank. It is primarily intended as a better interface to MET
correction routines as it allows an exact correction using the muon cluster
tower rather than an ad-hoc correction using the muon direction and the energy
of the cluster. So those who are always whining about this can stop whining,
compare the difference and see that, as I've always said, they can't see the
difference.

Simulation
==========
Take a look at the remarks on CMUSWM below.

Utilities
*********

CMUSWM
======
The fidicual volume for CMP has changed. Prior versions of CMUSWM implemented
CMP as symmetric east/west and top/bottom and as a single plane on the top and
bottom. The detectors were also uniformly too close to the interaction region
which gives an overestimate of the acceptance. Real detector positions for all
the different pieces are used. The short chambers on the bottom are also
implemented (which also reduces the acceptance). Overall this is a few percent
loss in acceptance (based on a uniform distribution in eta-phi of 20 GeV/c
tracks).

QFL (properly part of C$QFL but completely entangled with C$MUO) - 
Let me remark  here that MUOQFL and CMUSWM out of phase and that CMUSWM is 
right.