Status of the work on civil engineering and layout for CLIC, which included a tentative layout of the central area with the injection complexes, was given.

REX-ISOLDE is a post-accelerator for radioactive ions from the ISOLDE facility. In REX-ISOLDE ions are captured in a Penning trap (REXTRAP) and then transported to an EBIS (Electron Beam Ion Source). The following LINAC accelerates the ions to 2.2 MeV/u final energy. In this talk, an overview of REX-ISOLDE was given and the low-energy section (REXTRAP- EBIS) was described in more detail.

Réseau de métrologie pour main and drive linac, simulations influences des phénomènes de variation gravimétrique

Short view of simulation results related to the pre-alignment strategy discussed in the preceding meeting on alignment techniques.

Beam based correction by structure displacements.

Study of the realization of the structure beam-position monitors – BPMs.

Preliminary exploration of the use of a high-frequency, high-gradient two-beam accelerator based on CLIC as an X-ray Free Electron Laser driver.

The relationship between axial-symmetric beams with coupled transverse motion, electron beams created in a magnetic field , and highly elliptical beams have been discussed. Different definitions of emittance used for coupled beams were compared for clarification. This has applications to generating high quality elliptical beams, as in FNAL photo-injector flat beam experiment, and to transforming a ribbon beam into a large round beam in a reversible way.

Simulation of muon background in GEANT4, covering the muon-pair production in electro-magnetic showers by high energy photons.

Review of the activities carried out in 2001 on the CLIC study and the test facilities.

Title: A channeling experiment at CERN for a future positron source (WA103).
The experiment WA103, which concerns a new kind of positron source using channeling radiation of multi-GeV electrons in tungsten crystals to obtain a large number of e+e- pairs, has been worked out on the X5 transfer line of the SPS in 2000 and 2001. The incident electron energy was between 5 and 40 GeV, working mainly at 6 and 10 GeV. Crystal and amorphous targets of different thicknesses has been used. The data gathered on this experiment has been partly analyzed. Some results related to the momentum and angular distributions of the emitted positrons, obtained after reconstruction of the positron tracks in the main detector, the drift chamber, were presented. A rapid status on the R&D activities, for this kind of source, was also given.

Title: Positron production experiment in Tungsten crystal using 4 and 8 GeV channeling electrons at the KEKB injector linac.

Intense positron sources are widely investigated for the next-generation linear colliders and B-factories. A new method utilizing an axially oriented crystal as a positron-production target is one of the bright schemes since it provides a powerful photon source through channeling and coherent bremstrahlung processes when high-energy electrons penetrate the target. A series of positron-production experiments with crystal tungstens hit by 4 and 8 GeV single-bunch electron beams were carried out at the KEKB 8-GeV injector linac. Three tungsten crystals with different thicknesses (2.2, 5.3 an 9.0 mm) and those combined with amorphous tungsten plates were tested on a precise goniometer. The positron production yields were measured with a magnetic spectrometer in the positron momentum range from 5 to 20 MeV/c. The angle of the crystal axis with respect to the electron beam direction was controlled by measuring the relative intensities of the produced positrons as a function of the rotational angle of the goniometer. The results showed that the enhancements of the positron yield from crystal targets compared to amorphous targets of the same thickness at 20 MeV/c were from 1.5 to 3.7 and from 1.8 to 5.1, depending on the target thickness for 4 and 8 GeV electrons, respectively.

Presentation by W.Wuensch, F.Zimmermann, P.Royer and S.Redaelli of the most interesting topics from EPAC2002 Conference, with an emphasis on the papers submitted there in connection with CLIC/CTF activities.

Report on the Coherent Synchrotron Radiation Workshop, which took place in Berlin at the beginning of February 2002.

The laser-wire test experiment carried out on CTF2, analysis of the results, investigations-observations and future plans.

Simulations of gamma production and background for the laser-wire of CTF2 to compare with the experiment, and numerical study on the basic effects due to a laser-wire in a CLIC beam, production of degraded e-, impact in a detector, effects of losses, next steps.

CLIC stabilization results and measurements on water induced quadrupole vibrations.

Quantum mechanics limitations on beam demagnification and luminosity.

The Committee was set by ICFA in 2001 with the charge to assess the four linear collider approaches, which are developed to meet an energy of 500 GeV c.m. with a luminosity on the order of 10³⁴ cm^-2s^-1, and their potential extendibility to higher energies. The activities of the committee started about a year before and reached at the time of the meeting the point where a final report summarizing them has been put together. Greg Loew gave an overview of the assessments that the report contains about the technology, performance and reliability of each design, together with the R&D work that remains to be done.

Design recipe for a compact final focus and a first draft design for an FF test at CTF3.

Damping ring design status report.

Advanced presentation of the talk, which was given then in the Damping Ring Workshop at Daresbury (January 27-29) with the most recent developments on the subject at the time.

The usual CLIC meeting left the stage to an open ESGARD information meeting (most of the day) which was in particular important for the CLIC team members. Following a general presentation of the European Frame Program 6 (FP6) and an introduction of the Integrated Activity concept, the Network Activities (NA) and Joint Research Activities (JRA) planned to be proposed for Accelerator R&D were presented to the community of interested people. Were covered  the net-working activities on e+e- linear accelerator and collider, on the neutrino beams and on high-energy/high-intensity proton beams, as well as the joint research activities on Superconducting Cavity Technology, on Super-conducting RF Technology, on Photo-Injectors, on High Intensity Proton Pulsed Injector, on High Field Magnets and on Accelerator remote control/operation.