Beam Dynamics Panel
Working Group on High Luminosity e⁺e^- Colliders

The theme of this issue is e+e- Colliders: Past and Present Experiences and Future Frontiers.There are 27 excellent articles in four categories: (1) The fruitful factories: DAΦNE, PEP-II and KEKB; (2) A glorious past: LEP, CESR and VEPP-4M; (3) An exciting present: BEPC-II and VEPP2000; and (4) The challenging future: SuperB, SuperKEKB and BINP c-tau. These articles give a comprehensive review of this very important accelerator field by experts from all over the world and will no doubt serve as a valuable reference for every accelerator physicist who works or plans to work on e⁺e^- colliders.

Planning the construction of a collider means first of all, once the energy range is chosen, to fix a goal value for the peak luminosity, and consequently choose a design strategy to reach that goal. In designing a storage ring the operational experience of similar, existent machines is a valuable hint for what nature has allowed in that field. In this respect, a catalogue of characteristics and performances can be a very useful tool when designing new colliders or comparing operating machines.

The database created by M.E.Biagini is here.

SuperB General Meetings

EuCARD: European Coordination for Accelerator Research & Development. Its main goal is to upgrade the large European research accelerators by R&D on innovative concepts and techniques, thereby offering researchers the best facilities. This common venture will strengthen durable collaboration among the partners and will contribute to the development of world-class infrastructures, one of the main features of the European Research Area.

In particular:

• Work Package 11 (ANAC, Assessment of Novel Accelerator Concepts) Task 2 is dedicated to the Design of Interaction Regions for high luminosity colliders, with:
  
  
  1. Feasibility study of a new IR based on the Crab Waist concept for the upgraded KLOE experiment at DAΦNE-Factory (INFN-LNF).
  
  
  2. Study the possible integration of the Crab-Waist collision scheme into the LHC collider upgrade (CERN)


• Work package 4 (ACCNET, Accelerator Science Networks) is coordinating and integrating the activities of the European accelerator communities in order to guide significant upgrades of European research accelerator infrastructures and to prepare the way for new infrastructures, within a time scale of four years. Task 1 (Eurolumi) is the European forum for discussing performance limitations of high-intensity high-brightness accelerators, with emphasis on hadron facilities. It will help analyse and optimise the proposed upgrades of these facilities, and will also explore advanced future schemes such as proton driven plasma acceleration and medical applications of accelerator.

TIARA: Test Infrastructure and Accelerator Research Area. The main objective of TIARA is the integration of national and international accelerator R&D infrastructures into a single distributed European accelerator R&D facility. This will include the implementation of organizational structures to enable the integration of existing individual infrastructures, their efficient operation and upgrades, and the construction of new infrastructures as part of TIARA.

In particular:

• Work Package 8 (HGA, High Gradient Acceleration) is an upgrade of the existing S-band Linac of the SPARC Test Facility (advanced photo-injector) at LNF-Frascati with high gradient C-band accelerating structures is proposed, in order to reach 250 MeV at the end of the structure. This work will facilitate R&D on low emittance beams, photo-emission processes with novel cathodes, generation of polarized electrons, acceleration and synchronization of a bi-frequency Linac, efficiency and reliability of the system. A high performance C-band Linac, capable of delivering beams with the required properties in a very cost effective manner, will be extremely useful also for the planned Italian SuperB collider, a very high luminosity asymmetric (4 and 7 GeV) e⁺e^- collider at the B meson cm energy. In fact a critical SuperB subsystem is the injector, which needs to deliver very intense bunches of positrons and polarized electrons at very high rates, due to the low beam lifetimes in the ring caused by the SuperB large luminosity.

ATF2

BEPC-II

CESR

CESR-TA

CLIC

c/tau Factory BINP

DAΦNE

ILC

ILC Damping Rings

KEKB

PEP-II

SuperB

SuperKEKB

VEPP-4

VEPP 2000