Some impressions from the first session R' Assmann

1
Some impressions from the first session (R.
Assmann) Excellent talks summarized the whole
spectrum of crystal usage with beam! Nice
history Start as a stupid idea that will
never work! Worked very nicely in the end! We
can learn from this (make the impossible
possible) There is no doubt about the potential
of crystal channeling at high efficiencies! There
is a claim that collimation can be improved by a
large factor (5-20)! AGREEMENT? See
RHIC! Experiments done in SPS, Tevatron, Dubna,
Simulations for many situations, including SSC!
Generally good agreement with data! Operational
usage for collimation tried in RHIC Did not
work! WHY? Operational usage for collimation
foreseen in TEVATRON Will it work?
2
Usage for the LHC is clearly interesting Several
open questions (robustness, cleaning efficiency,
heating, ) ? Can they be addressed in SPS
test? What are the detailed goals and benefits
for an SPS experiment to learn more than at RHIC,
TEVATRON, ? What is the layout of an SPS
experiment and required time? Must such an
experiment be done in 2006? Should we in any case
install crystals into the LHC for 2007
(possible)? Need to understand layout with
crystals and crystal parameters for the LHC!