646
K. Hübner et al.
Fig. 10.18 Schematic layout of the right side of IR1
angle in IR1 is in the vertical plane and in IR5 in the horizontal plane). The small
β-function values at the IP are generated with the help of a triplet quadrupole
assembly. At the IP, the two rings share the same vacuum chamber, the same lowbeta triplet magnets and the D1 separation dipole magnets. The remaining matching
section (MS) and the dispersion suppressor (DS) consist of double-bore magnets
with separate beam pipes for each ring.
Figure 10.18 shows the schematic layout of IR1.
Apart from the DS the insertions are comprised of the following sections, given
in order from the interaction point:
• A 31 m long superconducting low-β triplet assembly operated at a temperature
of 1.9 K and providing a nominal gradient of 205 T/m.
• A pair of separation/recombination dipoles separated by approximately 88 m.
The D1 dipole located next to the triplet magnets has a single bore and consists
of six 3.4 m long conventional warm magnet modules yielding a nominal field of
1.38 T. The following D2 dipole is a 9.45 m long, double bore, superconducting
dipole magnet operating at a cryogenic temperature of 4.5 K with a nominal field
of 3.8 T. The bore separation in the D2 magnet is 188 mm and is thus slightly
smaller than the arc bore separation.
• Four matching quadrupole magnets. The first quadrupole following the separation dipole magnets, Q4, is a wide-aperture magnet operating at a cryogenic
temperature of 4.5 K and yielding a nominal gradient of 160 T/m. The remaining
three quadrupole magnets are normal-aperture quadrupole magnets operating at
a cryogenic temperature of 1.9 K with a nominal gradient of 200 T/m.
The triplet assembly features two different quadrupole designs: the outer two
quadrupole magnets are made by KEK and require a peak current of 6450 A to
reach the nominal gradient of 205 T/m, whereas the inner quadrupole block consists
of two quadrupole magnets made by FNAL and requires a peak current of 10,630 A.
The triplet quadrupoles are powered by two nested power converters: one 8 kA
power converter powering all triplet quadrupole magnets in series and one 6 kA
power converter supplying additional current only to the central two FNAL magnets.
The Q1 quadrupole next to the IP features an additional 600 A trim power converter.
The triplet quadrupoles are followed by the separation/recombination dipoles, D1
and D2, which guide the beams from the IP into two separated vacuum chambers.
K. Hübner et al.
Fig. 10.18 Schematic layout of the right side of IR1
angle in IR1 is in the vertical plane and in IR5 in the horizontal plane). The small
β-function values at the IP are generated with the help of a triplet quadrupole
assembly. At the IP, the two rings share the same vacuum chamber, the same lowbeta triplet magnets and the D1 separation dipole magnets. The remaining matching
section (MS) and the dispersion suppressor (DS) consist of double-bore magnets
with separate beam pipes for each ring.
Figure 10.18 shows the schematic layout of IR1.
Apart from the DS the insertions are comprised of the following sections, given
in order from the interaction point:
• A 31 m long superconducting low-β triplet assembly operated at a temperature
of 1.9 K and providing a nominal gradient of 205 T/m.
• A pair of separation/recombination dipoles separated by approximately 88 m.
The D1 dipole located next to the triplet magnets has a single bore and consists
of six 3.4 m long conventional warm magnet modules yielding a nominal field of
1.38 T. The following D2 dipole is a 9.45 m long, double bore, superconducting
dipole magnet operating at a cryogenic temperature of 4.5 K with a nominal field
of 3.8 T. The bore separation in the D2 magnet is 188 mm and is thus slightly
smaller than the arc bore separation.
• Four matching quadrupole magnets. The first quadrupole following the separation dipole magnets, Q4, is a wide-aperture magnet operating at a cryogenic
temperature of 4.5 K and yielding a nominal gradient of 160 T/m. The remaining
three quadrupole magnets are normal-aperture quadrupole magnets operating at
a cryogenic temperature of 1.9 K with a nominal gradient of 200 T/m.
The triplet assembly features two different quadrupole designs: the outer two
quadrupole magnets are made by KEK and require a peak current of 6450 A to
reach the nominal gradient of 205 T/m, whereas the inner quadrupole block consists
of two quadrupole magnets made by FNAL and requires a peak current of 10,630 A.
The triplet quadrupoles are powered by two nested power converters: one 8 kA
power converter powering all triplet quadrupole magnets in series and one 6 kA
power converter supplying additional current only to the central two FNAL magnets.
The Q1 quadrupole next to the IP features an additional 600 A trim power converter.
The triplet quadrupoles are followed by the separation/recombination dipoles, D1
and D2, which guide the beams from the IP into two separated vacuum chambers.