Abstract
Particle physicists working on colliding beam experiments are often faced with a
dilemma. The study of rare processes requires high luminosity and hence the
introduction of magnets close to the interaction point to focus the beams down
to the smallest possible transverse dimensions. The space occupied by these
magnets is not available for tracking devices or calorimeters and the acceptance
of the detector therefore suffers: experiments have historically been able to
have either the largest possible acceptance or the highest luminosity, but not
both. The aim of this proposal is to at least partially resolve this dilemma by
studying combined function magnets/calorimeters or magcals. These devices could
be used to provide the necessary focussing close to the interaction point
without compromising the experimental acceptance. They could also perhaps
replace the solenoid typically used to provide the experiment's magnetic field,
thereby reducing the amount of dead material these represent before or within
the electromagnetic and hadronic calorimeters.