synergies between accelerators, lasers and plasma 73
case of a large number of particles in the beam, as the pickup electrode would see signals from many particles, which
would then smear individual contributions.
4.3.6 Optical stochastic cooling
“Standard” stochastic cooling entails sampling of the beam
by electrostatic pick-up electrodes (see Fig. 4.33), and therefore its cooling rate is limited by the system bandwidth,
which is defined by pick-up length. An extension of the
method, optical stochastic cooling, uses optical pick-ups and
optical amplifiers as shown in Fig. 4.34, resulting in potential increases of bandwidth and of the cooling rate by several
orders of magnitude.
4XDGUXSROH
ZLJJOHU
'LSROH
ZLJJOHU
2SWLFDO
DPSOLILHU
FIGURE 4.35
Layout of optical stochastic cooling system in an accelerator.
In optical stochastic cooling, quadrupole wigglers and dipole
wigglers play the role of pick-up electrodes and kickers as
shown in Fig. 4.35.
Beam cooling methods, and stochastic cooling in particular, are excellent examples that demonstrate the discussed
AS-TRIZ principle — the evolution of technical systems from
microwave frequencies into optical range.
4.4 Interact
We have reached the final step of the sequence of Create —
Energize — Manipulate — Interact.
Once the beam is accelerated, it can be used in a variety of ways — from creating a radiation (synchrotron, betatron) source, a free electron laser, a collider, a spallation neutron source, to using beams for particle therapy, industrial
or security applications, or energy applications in acceleratordriven systems — ADS. Equally, amplified and compressed
laser pulses can be used in a variety of ways; in the context
of accelerator physics they can be used as a driver for particle acceleration, as the main component of a Compton X-ray
source or of a Photon collider, among other things.
We will touch on some of these further on in this text.
FIGURE 4.33
Standard stochastic cooling.
FIGURE 4.34
Optical stochastic cooling.
case of a large number of particles in the beam, as the pickup electrode would see signals from many particles, which
would then smear individual contributions.
4.3.6 Optical stochastic cooling
“Standard” stochastic cooling entails sampling of the beam
by electrostatic pick-up electrodes (see Fig. 4.33), and therefore its cooling rate is limited by the system bandwidth,
which is defined by pick-up length. An extension of the
method, optical stochastic cooling, uses optical pick-ups and
optical amplifiers as shown in Fig. 4.34, resulting in potential increases of bandwidth and of the cooling rate by several
orders of magnitude.
4XDGUXSROH
ZLJJOHU
'LSROH
ZLJJOHU
2SWLFDO
DPSOLILHU
FIGURE 4.35
Layout of optical stochastic cooling system in an accelerator.
In optical stochastic cooling, quadrupole wigglers and dipole
wigglers play the role of pick-up electrodes and kickers as
shown in Fig. 4.35.
Beam cooling methods, and stochastic cooling in particular, are excellent examples that demonstrate the discussed
AS-TRIZ principle — the evolution of technical systems from
microwave frequencies into optical range.
4.4 Interact
We have reached the final step of the sequence of Create —
Energize — Manipulate — Interact.
Once the beam is accelerated, it can be used in a variety of ways — from creating a radiation (synchrotron, betatron) source, a free electron laser, a collider, a spallation neutron source, to using beams for particle therapy, industrial
or security applications, or energy applications in acceleratordriven systems — ADS. Equally, amplified and compressed
laser pulses can be used in a variety of ways; in the context
of accelerator physics they can be used as a driver for particle acceleration, as the main component of a Compton X-ray
source or of a Photon collider, among other things.
We will touch on some of these further on in this text.
FIGURE 4.33
Standard stochastic cooling.
FIGURE 4.34
Optical stochastic cooling.