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J. Seeman et al.
7.3 CLIC & ILC
J. P. Delahaye · M. Ross · S. Stapnes
7.3.1 Introduction
The case for an e+e− collider to explore the physics opened up by the discovery
of the Higgs boson is widely accepted. More generally, with the completion of
the Standard Model the energy scales needed to explore it in great detail are
well established. Two alternative technologies for linear e+e− colliders are being
pursued, with different potential energy reach and performance considerations:
• The International Linear Collider (ILC) [38] being proposed in Japan with an
initial energy of 250 GeV has the potential to study the Higgs sector in great
detail. The ILC is based on beam acceleration by RF Super-Conducting cavities
and is prepared as an international project lead by Japan. The ILC Technical
Design Report (TDR) [39] was published in 2012 focusing on a 500 GeV
machine. Recently a 250 GeV initial stage has been defined [40].
• The Compact Linear Collider (CLIC) [41] study is exploring the possibility of
a Linear Collider with a Multi-TeV energy range through the development of
Two Beam Acceleration, a novel technology. Normal conducting 12 GHz Xband accelerating structures are used. The study is carried out an international
collaboration hosted by CERN. The CLIC Conceptual Design Report (CDR) was
published in 2012 [42]. In 2014 an initial stage at 380 GeV was defined and is
currently the main focus of the study [43].
These two studies, with the basic parameters shown in Table 7.2, aim to devise
appropriate facilities to complement the LHC in the e+e− area. A collaboration
between CLIC and ILC that takes advantage of the overlapping portions of the two
schemes has proven to be extremely fruitful.
The main challenge for both concepts is reliable and power efficient acceleration,
hence the focus on RF technology developments. Secondly, the required luminosity
of about 1.5 × 10 34 cm −2 s −1 is a major challenge. It requires collisions of powerful
beams with extremely small beam dimensions (a few nm in the vertical plane). Cost
is another key factor, both ILC and CLIC aiming for project-costs comparable to
LHC [44].
7.3.2 ILC Design
The design of the International Linear Collider (ILC) is based on 1.3 GHz SuperConducting RF technology (SCRF). The configuration of the linac power and utility
J. Seeman et al.
7.3 CLIC & ILC
J. P. Delahaye · M. Ross · S. Stapnes
7.3.1 Introduction
The case for an e+e− collider to explore the physics opened up by the discovery
of the Higgs boson is widely accepted. More generally, with the completion of
the Standard Model the energy scales needed to explore it in great detail are
well established. Two alternative technologies for linear e+e− colliders are being
pursued, with different potential energy reach and performance considerations:
• The International Linear Collider (ILC) [38] being proposed in Japan with an
initial energy of 250 GeV has the potential to study the Higgs sector in great
detail. The ILC is based on beam acceleration by RF Super-Conducting cavities
and is prepared as an international project lead by Japan. The ILC Technical
Design Report (TDR) [39] was published in 2012 focusing on a 500 GeV
machine. Recently a 250 GeV initial stage has been defined [40].
• The Compact Linear Collider (CLIC) [41] study is exploring the possibility of
a Linear Collider with a Multi-TeV energy range through the development of
Two Beam Acceleration, a novel technology. Normal conducting 12 GHz Xband accelerating structures are used. The study is carried out an international
collaboration hosted by CERN. The CLIC Conceptual Design Report (CDR) was
published in 2012 [42]. In 2014 an initial stage at 380 GeV was defined and is
currently the main focus of the study [43].
These two studies, with the basic parameters shown in Table 7.2, aim to devise
appropriate facilities to complement the LHC in the e+e− area. A collaboration
between CLIC and ILC that takes advantage of the overlapping portions of the two
schemes has proven to be extremely fruitful.
The main challenge for both concepts is reliable and power efficient acceleration,
hence the focus on RF technology developments. Secondly, the required luminosity
of about 1.5 × 10 34 cm −2 s −1 is a major challenge. It requires collisions of powerful
beams with extremely small beam dimensions (a few nm in the vertical plane). Cost
is another key factor, both ILC and CLIC aiming for project-costs comparable to
LHC [44].
7.3.2 ILC Design
The design of the International Linear Collider (ILC) is based on 1.3 GHz SuperConducting RF technology (SCRF). The configuration of the linac power and utility