Category: Faq
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Where will CLIC be built?
It is presently assumed that CLIC will be built underground, near to CERN in the area close to Geneva.
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When will CLIC be built?
After the LHC, currently due to complete data-taking in 2030.
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How much power will CLIC use?
Designed to be a high luminosity, high energy linear collider, CLIC will inevitably need high power. Compared to an accelerator using superconducting technology, CLIC nevertheless has very low power consumption in stand-by or “waiting-for-beam” mode. A preliminary analysis of the overall CLIC energy consumption per year for the various stages shows that the first stage
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Why does CLIC have sectors?
The two main CLIC linacs are each divided into 24 sectors. Each sector is 878 m long, and contains around 3000 accelerating structures. A fresh drive beam is injected into each sector to accelerate the main beam. At the end of the sector, the spent drive beam is dumped and a new drive beam is
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What happens to the drive beams after they have been used?
Each spent drive beam will already have lost 90% of its power in the PETS. After each of the 48 decelerating sectors the drive beam must be bent away from the linac, leaving enough space for a new drive beam to be injected to the next sector. The old beam is bent away using a
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What is special about CLIC accelerating cavities?
CLIC accelerating structures are designed and built to run very stably at a very high accelerating gradient (100 MV/m). The structures are built to micron-level tolerances to ensure that the beam quality is not degraded by beam-to-structure misalignment effects.
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How many two-beam modules are needed for CLIC? How many accelerating structures?
Each 21 km main linac has 10,380 two-beam modules. Each two-beam module contains up to four PETS. Each PETS generates the RF power for two accelerating structures. CLIC therefore has 71,460 PETS and some 143,000 accelerating cavities in total. The LHC uses 8 accelerating cavities per beam.
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How does two-beam acceleration work?
An intense beam of electrons is accelerated to a comparatively low energy (2.4 GeV) using conventional klystrons. This ‘drive beam’ is injected into a series of Power Extraction and Transfer Structures (PETS), which decelerate the dense beam and extract its energy. This energy is fed via an RF field in a waveguide to a second
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What is special regarding the CLIC accelerating scheme?
In a classical approach, the linear accelerators used to accelerate the beams would be powered by Radio Frequency (RF) power supplies, called klystrons. In the CLIC acceleration scheme, the klystrons are replaced with an intense particle beam, called the drive beam. The kinetic energy in the drive beam is converted into RF power, which in
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Why a two-beam scheme?
The luminosity of the accelerator scales as the wall-plug-to-beam efficiency. So one needs at the same time a high-gradient acceleration and an efficient energy transfer. The use of high-frequency RF maximizes the electric field in the RF cavities for a given stored energy. However, standard RF sources scale unfavorably to high frequencies, both in maximum