CERN SL/95-09 (AP), LHC Note 313 (1995) and Proc. Workshop on Collective Effects in Large Hadron Colliders,
Montreux, 1994, eds. E. Keil and F. Ruggiero (Part. Accel. 50, 1995),
pp. 83-104, see also LHC Study Group,
The Large Hadron Collider, Conceptual design, CERN/AC/95-05 (LHC) (1995),
pp. 50-52.
Revised parameters for the LHC White Book version 2
Next: Introduction
Single-Beam Collective Effects in the LHC
Francesco Ruggiero
June 1995
Abstract:
Single-beam collective effects can limit the current and therefore
the performance of the Large Hadron Collider (LHC), unless the impedance of the
different vacuum chamber discontinuities seen by the beam is kept below certain limits.
Together with parasitic loss considerations,
this has an impact on the design of several machine components,
such as monitors, kickers, bellows, warm sections, experimental beam pipes, rf-cavities,
feedback systems and especially on the thermal beam screen,
with its millions of pumping slots.
After reviewing the LHC impedance budget in view of the most recent design options,
we compute rise times and thresholds for different instabilities,
as well as coherent and incoherent tune shifts and
parasitic losses.
F. Ruggiero
Sun Sep 8 21:54:52 METDST 1996