10 The Largest Accelerators and Colliders of Their Time
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Q4, Q5, Q6, Q7, Q8, Q9 and Q10 are individually powered magnets. The aperture
of Q4 is larger to provide sufficient aperture for the crossing angle separation orbit.
Two absorbers protect the cold magnets from particles leaving the IP. The TAS
absorber protects the triplet quadrupole magnets and the TAN absorber, located in
front of the D1 dipole magnet, protects the machine elements from neutral particles
leaving the IP.
The matching section extends from Q4 to Q7 and the DS extends from Q8 to
Q11. In addition to the DS, the first two trim quadrupoles of the first arc cell (QT12
and QT13) are also used for the matching procedure. All insertion and DS magnets
are equipped with a beam screen [2]. The magnets left and right from the IP up to
Q7 inclusive are placed symmetrically with respect to the IP. The positions of Q8,
Q9 and Q10 left and right from the IP differ by approximately 0.5 m with respect to
the IP due to the limited space in the DS.
10.6.2.5 LSS2
The straight section at IR2 houses the injection elements for Ring-1 as well
as the ion beam experiment ALICE. During injection the optics must obey the
special constraints imposed by the beam injection for Ring-1 and the geometrical
acceptance in the interaction region (IR) must be large enough to accommodate both
beams in the common part of the ring with a beam separation of at least 10 σ .
Figures 10.19 and 10.20 show the schematic layout of IR2.
Fig. 10.19 Schematic layout of the left side of IR2
Fig. 10.20 Schematic layout of the right side of IR2
647
Q4, Q5, Q6, Q7, Q8, Q9 and Q10 are individually powered magnets. The aperture
of Q4 is larger to provide sufficient aperture for the crossing angle separation orbit.
Two absorbers protect the cold magnets from particles leaving the IP. The TAS
absorber protects the triplet quadrupole magnets and the TAN absorber, located in
front of the D1 dipole magnet, protects the machine elements from neutral particles
leaving the IP.
The matching section extends from Q4 to Q7 and the DS extends from Q8 to
Q11. In addition to the DS, the first two trim quadrupoles of the first arc cell (QT12
and QT13) are also used for the matching procedure. All insertion and DS magnets
are equipped with a beam screen [2]. The magnets left and right from the IP up to
Q7 inclusive are placed symmetrically with respect to the IP. The positions of Q8,
Q9 and Q10 left and right from the IP differ by approximately 0.5 m with respect to
the IP due to the limited space in the DS.
10.6.2.5 LSS2
The straight section at IR2 houses the injection elements for Ring-1 as well
as the ion beam experiment ALICE. During injection the optics must obey the
special constraints imposed by the beam injection for Ring-1 and the geometrical
acceptance in the interaction region (IR) must be large enough to accommodate both
beams in the common part of the ring with a beam separation of at least 10 σ .
Figures 10.19 and 10.20 show the schematic layout of IR2.
Fig. 10.19 Schematic layout of the left side of IR2
Fig. 10.20 Schematic layout of the right side of IR2