CLIC Meetings 2008
from
Friday 11 January 2008 (09:00)
to
Tuesday 9 December 2008 (11:00)
Monday 7 January 2008
Tuesday 8 January 2008
Wednesday 9 January 2008
Thursday 10 January 2008
Friday 11 January 2008
09:00
Report from visit to KEK/ATF
-
Frank Zimmermann
(
AB/ABP
)
Rogelio Tomas
(
CERN
)
Report from visit to KEK/ATF
Frank Zimmermann
(
AB/ABP
)
Rogelio Tomas
(
CERN
)
09:00 - 10:00
Room: 6/2-004
We present highlights from our visit to KEK/ATF in December 2007, including ATF beam studies, the ILC-Damping Ring workshop, and the 5th ATF2 Project meeting.
Saturday 12 January 2008
Sunday 13 January 2008
Monday 14 January 2008
Tuesday 15 January 2008
Wednesday 16 January 2008
Thursday 17 January 2008
Friday 18 January 2008
Saturday 19 January 2008
Sunday 20 January 2008
Monday 21 January 2008
Tuesday 22 January 2008
Wednesday 23 January 2008
Thursday 24 January 2008
Friday 25 January 2008
Saturday 26 January 2008
Sunday 27 January 2008
Monday 28 January 2008
Tuesday 29 January 2008
Wednesday 30 January 2008
Thursday 31 January 2008
Friday 1 February 2008
Saturday 2 February 2008
Sunday 3 February 2008
Monday 4 February 2008
Tuesday 5 February 2008
Wednesday 6 February 2008
Thursday 7 February 2008
Friday 8 February 2008
Saturday 9 February 2008
Sunday 10 February 2008
Monday 11 February 2008
Tuesday 12 February 2008
Wednesday 13 February 2008
Thursday 14 February 2008
Friday 15 February 2008
Saturday 16 February 2008
Sunday 17 February 2008
Monday 18 February 2008
Tuesday 19 February 2008
Wednesday 20 February 2008
Thursday 21 February 2008
Friday 22 February 2008
09:00
Pulsed Surface Heating: The Results of Fatigue Experiments and Estimated Material Limits
-
Samuli Tapio Heikkinen
(
Unknown
)
Pulsed Surface Heating: The Results of Fatigue Experiments and Estimated Material Limits
Samuli Tapio Heikkinen
(
Unknown
)
09:00 - 10:00
Room: 6/2-004
The need for high accelerating gradient for CLIC imposes considerable constraints on the materials of the accelerating structures. The surfaces exposed to high pulsed RF currents are subject to cyclic thermal stresses possibly resulting in surface break-up by fatigue. Since "CLIC compatible" fatigue data does not exist in the literature, a comprehensive study was initiated. It is also likely that pure oxygen-free copper cannot meet the current CLIC parameters so a set of candidate materials were studied. A combination of three independent fatigue experiments are hoped to enable quantitative predictions for the required 20 years lifetime of the CLIC accelerating structures.
Saturday 23 February 2008
Sunday 24 February 2008
Monday 25 February 2008
Tuesday 26 February 2008
Wednesday 27 February 2008
Thursday 28 February 2008
Friday 29 February 2008
09:00
Analysis of '07 CTF3 beam optics measurements
-
Piotr Krzysztof Skowronski
(
Warsaw University of Technology
)
Analysis of '07 CTF3 beam optics measurements
Piotr Krzysztof Skowronski
(
Warsaw University of Technology
)
09:00 - 10:00
Room: 6/2-004
We present the status of the CTF3 Combiner Ring commissioning with the main focus on the optics measurements: tune, dispersion, response matrix, and closed orbit length.
Saturday 1 March 2008
Sunday 2 March 2008
Monday 3 March 2008
Tuesday 4 March 2008
Wednesday 5 March 2008
Thursday 6 March 2008
Friday 7 March 2008
Saturday 8 March 2008
Sunday 9 March 2008
Monday 10 March 2008
Tuesday 11 March 2008
Wednesday 12 March 2008
11:00
8 GeV C-Band Accelerator for XFEL/SPring-8
-
Takahiro Inagaki
(
RIKEN SPring-8 center
)
8 GeV C-Band Accelerator for XFEL/SPring-8
Takahiro Inagaki
(
RIKEN SPring-8 center
)
11:00 - 12:00
Room: 6/2-004
The 8 GeV C-band electron linear accelerator is under construction at the SPring-8 site aiming at generating an FEL X-ray beam in 2010. C-band accelerator technology has been developed initially at KEK for the e+e- linear collider project, and employed at the XFEL project in Japan. Since C-band generates a high gradient acceleration field as high as 35 MV/m, the total length of the accelerator fits within 400 m, including the injector and three bunch compressors. XFEL requires precise control of the rf intensity and phase for electron bunch compression. We know the largest source of the pulse-to-pulse instability (jitter) is the klystron voltage jitter. Therefore, we have been developed extremely stable klystron power supply. The talk will cover the current status of the XFEL project and hardware development, focused on the klystron power supply.
Thursday 13 March 2008
Friday 14 March 2008
09:00
High Gradient Testing Results in 2007
-
Steffen Doebert
(
CERN
)
Jan Kovermann
(
III. Physikalisches Institut (B) - Rheinisch-Westfaelische Tech.
)
Alexey Dubrovskiy
(
Unknown
)
High Gradient Testing Results in 2007
Steffen Doebert
(
CERN
)
Jan Kovermann
(
III. Physikalisches Institut (B) - Rheinisch-Westfaelische Tech.
)
Alexey Dubrovskiy
(
Unknown
)
09:00 - 10:00
Room: 6/2-004
The results of last years high-gradient experiments will be presented and summarized. The focus will be on 30 GHz results obtained in CTF3 but the experiments at SLAC will be mentioned as well. Jan will present first results of his time resolved spectrometer and Alexey will review the improvements of the automatic conditioning system and the conditioning website.
Saturday 15 March 2008
Sunday 16 March 2008
Monday 17 March 2008
Tuesday 18 March 2008
Wednesday 19 March 2008
Thursday 20 March 2008
Friday 21 March 2008
Saturday 22 March 2008
Sunday 23 March 2008
Monday 24 March 2008
Tuesday 25 March 2008
Wednesday 26 March 2008
Thursday 27 March 2008
Friday 28 March 2008
Saturday 29 March 2008
Sunday 30 March 2008
Monday 31 March 2008
Tuesday 1 April 2008
Wednesday 2 April 2008
Thursday 3 April 2008
Friday 4 April 2008
09:00
SEM inspections of CTF3 structures tested in 2007
-
Gonzalo Arnau Izquierdo
(
CERN
)
Samuli Tapio Heikkinen
(
Unknown
)
SEM inspections of CTF3 structures tested in 2007
Gonzalo Arnau Izquierdo
(
CERN
)
Samuli Tapio Heikkinen
(
Unknown
)
09:00 - 10:00
Room: 6/2-004
The observations made for structures tested last year will be presented. They concern the two disc structures pi/2 and 2pi/3 after test. Also observations on 30HDS thick structure before and after RF test will be presented, including the effects of chemical cleaning and heat treatment preparation for a new RF test. For 30CNSQ thick and 30HDS11 small structures only the characterization before testing will be shown.
Saturday 5 April 2008
Sunday 6 April 2008
Monday 7 April 2008
Tuesday 8 April 2008
Wednesday 9 April 2008
Thursday 10 April 2008
Friday 11 April 2008
09:00
Surface treatments and coating for beam pipes
-
Paolo Chiggiato
(
CERN
)
Surface treatments and coating for beam pipes
Paolo Chiggiato
(
CERN
)
09:00 - 10:00
Room: 6/2-004
Intrinsic and dynamic outgassing from beam pipe materials hinders the achievement of very low pressure. Both surfaces and bulk contributes to the total gas load that must be evacuated by appropriate and expensive pumps. To reduce this inconvenience, two lines of attack are generally considered: surface modification, either by chemical methods or coating, and thermal treatments. After a summary of the most prominent features of outgassing, I will focus the talk on chemical cleaning methods and on the main approaches for the evaluation of cleanliness. Thermal treatments, both in vacuum and in air, will be considered and the main equations for the evaluation of outgassing rate variation will be addressed. The benefits of coating will be underlined, in particular for NEG, and their limitations critically analyzed, mostly for polymeric substrates. Finally, I will elaborate on some subjects of specific interest for the CLIC project regarding surface treatments and characterisation (for example low SEY materials, low activation temperature NEG, water outgassing in the RF cells, electropolishing, etc.).
Saturday 12 April 2008
Sunday 13 April 2008
Monday 14 April 2008
Tuesday 15 April 2008
Wednesday 16 April 2008
Thursday 17 April 2008
Friday 18 April 2008
09:00
PLACET Consolidation and Review
-
Andrea Latina
(
CERN
)
PLACET Consolidation and Review
Andrea Latina
(
CERN
)
09:00 - 10:00
Room: 6/2-004
After a consolidation phase that lasted several months, PLACET has reached its maturity. Also, its diffusion among several institutes improved portability, usability and reliability of the code. Several PLACET based studies are ongoing: study of the emittance growth in the CLIC Injector and the Booster Linacs, beam-based alignment of the CLIC Beam Delivery System, feedback system and static alignment of the ATF2 machine, start-to-end simulations of fast intratrain feedback in ILC, and crab cavity correction schemes in the ILC BDS. In this talk some of these results will be reviewed.
Saturday 19 April 2008
Sunday 20 April 2008
Monday 21 April 2008
Tuesday 22 April 2008
Wednesday 23 April 2008
Thursday 24 April 2008
Friday 25 April 2008
09:00
Status of the CLIC DR wiggler design and production at BINP
-
Evgeny Levichev
Konstantin Zolotarev
Status of the CLIC DR wiggler design and production at BINP
Evgeny Levichev
Konstantin Zolotarev
09:00 - 09:20
Room: 6/2-004
A short prototype of the SC wiggler for the CLIC damping ring is now under production at BINP, Novosibirsk. In this report we describe the wiggler parameters, present status, magnetic measurement approach and time schedule. The problem of the SR power evacuation from the wiggler straight section (including software and illustrative results) is discussed.
Saturday 26 April 2008
Sunday 27 April 2008
Monday 28 April 2008
Tuesday 29 April 2008
Wednesday 30 April 2008
Thursday 1 May 2008
Friday 2 May 2008
Saturday 3 May 2008
Sunday 4 May 2008
Monday 5 May 2008
Tuesday 6 May 2008
Wednesday 7 May 2008
Thursday 8 May 2008
Friday 9 May 2008
09:00
Comprehensive Analysis of High Gradient RF Test Results and New RF Constraints
-
Alexej Grudiev
(
CERN
)
Comprehensive Analysis of High Gradient RF Test Results and New RF Constraints
Alexej Grudiev
(
CERN
)
09:00 - 10:00
Room: 6/2-004
Comprehensive analysis of high gradient RF test results both at X-band and at 30 GHz will be given. An analytical model of RF breakdown will be described. A new RF field quantity will be defined, which limits high gradient perfomance of accelerating structures. Implications for CLIC main linac accelerating structure design will be discussed.
Saturday 10 May 2008
Sunday 11 May 2008
Monday 12 May 2008
Tuesday 13 May 2008
Wednesday 14 May 2008
Thursday 15 May 2008
Friday 16 May 2008
09:00
Review of the design and status of the CTF3 tail-clipper kicker
-
Mike Barnes
(
CERN
)
Review of the design and status of the CTF3 tail-clipper kicker
Mike Barnes
(
CERN
)
09:00 - 09:30
Room: 6/2-004
The CTF3 tail-clipper must have a rise-time of 5ns or less in order to minimize uncontrolled beam loss; this is a technically challenging requirement. This talk reviews the design of the tail-clipper, presents measurement data and gives an update of the status of this fast kicker.
09:30
Design and status of the tail-clipper collimator for CTF3
-
Rocio Chamizo
(
CERN
)
Design and status of the tail-clipper collimator for CTF3
Rocio Chamizo
(
CERN
)
09:30 - 10:00
Room: 6/2-004
The tailclipper collimator in the TL2 transfer line will have a double functionality. At first, it will serve, in combination with the tail-clipper kicker, to adjust the bunch train length arriving from the combiner ring. In addition, when required, it will operate as an internal beam dump. The need of combining these two functionalities together with the beam parameters imposes strict constraints on the design of the collimator. This presentation will cover the design of the Tailclipper collimator, the key issues during its operation and the status of the production.
Saturday 17 May 2008
Sunday 18 May 2008
Monday 19 May 2008
Tuesday 20 May 2008
Wednesday 21 May 2008
Thursday 22 May 2008
Friday 23 May 2008
Saturday 24 May 2008
Sunday 25 May 2008
Monday 26 May 2008
Tuesday 27 May 2008
Wednesday 28 May 2008
Thursday 29 May 2008
Friday 30 May 2008
09:00
News from the Stabilization Working Group
-
Claude Hauviller
(
CERN
)
News from the Stabilization Working Group
Claude Hauviller
(
CERN
)
09:00 - 10:00
Room: 6/2-004
The stabilization working group reports to the newly created CLIC Technical Committee. It regroups the labs collaborating on the subject. The first Stabilization day held in March was the opportunity to review the state-of-the-art and to elaborate a work plan in order to demonstrate the feasibility. This presentation will give hints on what's going-on and what we could expect to achieve in the next years.
Saturday 31 May 2008
Sunday 1 June 2008
Monday 2 June 2008
Tuesday 3 June 2008
Wednesday 4 June 2008
Thursday 5 June 2008
Friday 6 June 2008
Saturday 7 June 2008
Sunday 8 June 2008
Monday 9 June 2008
Tuesday 10 June 2008
Wednesday 11 June 2008
Thursday 12 June 2008
Friday 13 June 2008
09:00
Status of photoinjectors at CERN
-
Konrad Elsener
(
CERN
)
Massimo Petrarca
Status of photoinjectors at CERN
Konrad Elsener
(
CERN
)
Massimo Petrarca
09:00 - 10:00
Room: 6/2-004
Two photoinjectors are presently under construction at CERN. One of them will be the source of the CALIFES probe beam in CLEX, the other one is part of the PHIN joint research activity in CARE. The PHIN photoinjector is being installed on a stand-alone test bench in CTF2. The electron bunches in both photoinjectors are produced by illuminating Cs-Te photocathodes with energetic pulses of UV laser light. The laser system is, to a large extent, common to both photoinjectors. Preparation of photocathodes takes place "in situ" for the CALIFES photoinjector, while the photocathodes for PHIN are produced in the laboratory and transported to the photoinjector under vacuum. In this CLIC meeting, the construction- and installation-status of the two RF guns is summarised. The present performance of the laser system is described in detail, and the status of the photocathode production is given.
Saturday 14 June 2008
Sunday 15 June 2008
Monday 16 June 2008
Tuesday 17 June 2008
Wednesday 18 June 2008
Thursday 19 June 2008
09:00
Calorimetry for a CLIC experiment: what do we know, and what do we need to learn?
-
Lucie Linssen
(
CERN
)
Calorimetry for a CLIC experiment: what do we know, and what do we need to learn?
Lucie Linssen
(
CERN
)
09:00 - 10:00
Room: 6/2-004
The seminar will address the role of calorimetry at CLIC. Using the reports made at the EFCA linear collider workshop in Warsaw (June 9-12, 2008), the present status of the calorimetry performance simulations and hardware R&D for the three ILC detector concepts will be summarised. The ILC calorimetry studies will then be addressed in the light of their validity for a CLIC experiment. As a result, a first draft calorimetry working plan for the CLIC detector study team will be presented for discussion.
Friday 20 June 2008
Saturday 21 June 2008
Sunday 22 June 2008
Monday 23 June 2008
Tuesday 24 June 2008
Wednesday 25 June 2008
Thursday 26 June 2008
Friday 27 June 2008
Saturday 28 June 2008
Sunday 29 June 2008
Monday 30 June 2008
Tuesday 1 July 2008
Wednesday 2 July 2008
Thursday 3 July 2008
Friday 4 July 2008
Saturday 5 July 2008
Sunday 6 July 2008
Monday 7 July 2008
Tuesday 8 July 2008
Wednesday 9 July 2008
Thursday 10 July 2008
Friday 11 July 2008
Saturday 12 July 2008
Sunday 13 July 2008
Monday 14 July 2008
Tuesday 15 July 2008
Wednesday 16 July 2008
Thursday 17 July 2008
Friday 18 July 2008
Saturday 19 July 2008
Sunday 20 July 2008
Monday 21 July 2008
Tuesday 22 July 2008
Wednesday 23 July 2008
Thursday 24 July 2008
Friday 25 July 2008
09:00
Review of CESR-TA kick-off
-
Giovanni Rumolo
(
CERN
)
Sergio Calatroni
(
CERN
)
Review of CESR-TA kick-off
Giovanni Rumolo
(
CERN
)
Sergio Calatroni
(
CERN
)
09:00 - 10:00
Room: 6/2-004
The general goals of the series of the ILCDR Workshops are to identify R&D specific topics for the damping rings, review their present status and understanding through technical presentations and discussions, and lay out an R&D plan. The ILCDR08 at the Cornell University has focused on the subjects of Electron Cloud and Low Emitttance Tuning, by bringing together world experts to provide guidance and suggestions for the CESR-TA program, which will be carried out over 2 years of flexible experimental operations. The scope of this presentation will be to give a general overview on the results presented in the ILCDR08 Electron Cloud sessions, and the relative discussions. The four dedicated EC Working Sessions included the review of recent experimental results, simulation codes, mitigation techniques and future experimental planning. The main charge of the EC Working Group was to ultimately identify a set of e-cloud experimental tests that could be scheduled as part of the CesrTA program. These tests should be finalized to the validation of electron cloud modelling tools (both build-up and instability simulations), where possible in a parameter range relevant for the ILC (CLIC) damping rings, and to the demonstration of the techniques for mitigation of electron cloud effects, which would allow operation of the damping rings.
Saturday 26 July 2008
Sunday 27 July 2008
Monday 28 July 2008
Tuesday 29 July 2008
Wednesday 30 July 2008
Thursday 31 July 2008
Friday 1 August 2008
Saturday 2 August 2008
Sunday 3 August 2008
Monday 4 August 2008
Tuesday 5 August 2008
Wednesday 6 August 2008
Thursday 7 August 2008
Friday 8 August 2008
Saturday 9 August 2008
Sunday 10 August 2008
Monday 11 August 2008
Tuesday 12 August 2008
Wednesday 13 August 2008
Thursday 14 August 2008
Friday 15 August 2008
09:00
Review of Nanobeam'08
-
Ofelia Capatina
(
CERN
)
Review of Nanobeam'08
Ofelia Capatina
(
CERN
)
09:00 - 10:00
Room: 6/2-004
The Advanced Beam Dynamics Workshop NANOBEAM-2008, organized by the Budker Institute of Nuclear Physics, took place during the last week of May in the Russian city Novosibirsk, the so-called capital of Siberia. Two previous Nanobeam workshops took place at Lausanne (Switzerland) in 2002 and at Uji (Japan) in 2005. The topics covered by the workshop this year include Linear Colliders as well as Advanced Beam Science and Technology. The highlights from Nanobeam’08 are presented.
Saturday 16 August 2008
Sunday 17 August 2008
Monday 18 August 2008
Tuesday 19 August 2008
Wednesday 20 August 2008
Thursday 21 August 2008
Friday 22 August 2008
09:00
Commissioning of spectrometers in CTF3
-
Maja Olvegaard
Commissioning of spectrometers in CTF3
Maja Olvegaard
09:00 - 09:15
Room: 6/2-004
An overview of the status of the commissioning of two spectrometers, based on segmented dumps, used for time resolved energy measurements of the beam.
09:15
Experimental characterization of the PHIN photo injector for CTF3: Initial simulation results and the method for emittance measurement
-
Oznur Mete
(
Unknown
)
Experimental characterization of the PHIN photo injector for CTF3: Initial simulation results and the method for emittance measurement
Oznur Mete
(
Unknown
)
09:15 - 09:30
Room: 6/2-004
Within the framework of the second Joint Research Activity PHIN of the European CARE program, a new photo injector for the CTF3 drive beam has been designed and is now being constructed in collaboration between LAL, CCLRC and CERN. The laser driven rf photo injectors are recent candidates for high-brightness, low-emittance electron sources motivating the research on emittance compensation theory and precise emittance measurement techniques. Beam dynamics simulation results, obtained from PARMELA code, are presented. After summarizing the emittance growth mechanism for the photo injectors, the emittance measurement by the pepper-pot method, that will be implemented on the beamline, is discussed. Finally the pepper-pot measurement results from the PSI OBLA 500 kV test-stand are presented.
09:30
Outlooks for CTF3 automatic steering
-
Erik Adli
(
European Organization for Nuclear Research (CERN)
)
Outlooks for CTF3 automatic steering
Erik Adli
(
European Organization for Nuclear Research (CERN)
)
09:30 - 09:45
Room: 6/2-004
A study to improve CTF3 automatic steering is in progress, involving tests of dispersion-free steering as well as improved model identification routines (needed for model-based steering). The test-case for this study will be the CTF3 linac. The presentation gives the status and outlooks of this work.
09:45
Size Matters : Bunch Length Measurements in CTF3
-
Julian Jesse Jacobson
(
Department of Physics and Astronomy-Northwesten University-Unkno
)
Size Matters : Bunch Length Measurements in CTF3
Julian Jesse Jacobson
(
Department of Physics and Astronomy-Northwesten University-Unkno
)
09:45 - 10:00
Room: 6/2-004
Installed just beyond the Delay Loop in CTF3 is an RF pick-up which measures the electromagnetic field frequency spectrum of the passing particles. The RF signals are split to be measured into four separate frequency bands and we can record the amplitude and phase of these signals and from there calculate the length of the particle bunches. It is important to monitor these lengths to ensure that ideal beam parameters are held through different structures in CTF3. I will present the work that has been done in both the online and offline analysis code to examine the signals and present results of a recent scan.
Saturday 23 August 2008
Sunday 24 August 2008
Monday 25 August 2008
Tuesday 26 August 2008
Wednesday 27 August 2008
Thursday 28 August 2008
Friday 29 August 2008
Saturday 30 August 2008
Sunday 31 August 2008
Monday 1 September 2008
Tuesday 2 September 2008
Wednesday 3 September 2008
Thursday 4 September 2008
Friday 5 September 2008
09:00
Analytical Considerations for Minimum Emittance Cells - Application to the CLIC Pre-Damping Rings
-
Fanouria Antoniou
Analytical Considerations for Minimum Emittance Cells - Application to the CLIC Pre-Damping Rings
Fanouria Antoniou
09:00 - 09:30
Room: 6/2-004
The CLIC pre-damping rings have to accommodate a large emittance beam, coming in particu lar from the positron target andreduce its size to low enough values for injection into the main damping rings. Linear lattice design options based on an analytical approach for minimum emittance cells are presented. In particular the parameterisation of the cells quadrupole strengths and optics function with respect to the emittance and drift lengths is derived. Complementary considerations regarding constraints imposed by polarized positron stacking are also considered.
09:30
CLIC Damping Rings Overview
-
Yannis Papaphilippou
(
CERN
)
CLIC Damping Rings Overview
Yannis Papaphilippou
(
CERN
)
09:30 - 10:00
Room: 6/2-004
Triggered by the RF frequency reduction of the CLIC main linac cavities, the damping ring parameters had to be re-evaluated and the ring's performance adapted to the new luminosity requirements. In particular, the ring's lattice is being re-designed in order for the magnet parameters to become less challenging. The progress in other areas such as wiggler design, radiation absorption non-linear dynamics and collective effects will be presented. In view of a staged approach for reaching the ultimate CLIC energy, conservative output emittances are scaled from operating or approved synchrotron lattice source projects. To this end, the dependence output emittances is evaluated with respect to different beam parameters such as bunch population, beam energy and longitudinal beam characteristics.
Saturday 6 September 2008
Sunday 7 September 2008
Monday 8 September 2008
Tuesday 9 September 2008
Wednesday 10 September 2008
Thursday 11 September 2008
Friday 12 September 2008
Saturday 13 September 2008
Sunday 14 September 2008
Monday 15 September 2008
Tuesday 16 September 2008
Wednesday 17 September 2008
Thursday 18 September 2008
Friday 19 September 2008
09:00
CLIC Material Fatigue Study: A summary of results of recent observations and test campaigns
-
Markus Aicheler
(
Ruhr-Universitaet Bochum
)
CLIC Material Fatigue Study: A summary of results of recent observations and test campaigns
Markus Aicheler
(
Ruhr-Universitaet Bochum
)
09:00 - 10:00
Room: 6/2-004
The fatigue of the accelerating structures material due to cyclic heating arising from induced eddy currents is still considered as a critical issue. Until now it is unclear to which extent the fatigue impairs the performance of the structure through the lifetime. Recent experiments showed that surface roughness and even small surface cracks did not influence the Q-factor which is linked to the RF-performance. In terms of breakdown there are several theories how fatigue phenomena increase the breakdown rate. An overview of four experiments to assess fatigue behavior is presented. Namely: conventional fatigue test, pulsed laser test, ultra sound swinger test and RF-fatigue test. The experimental results obtained so far will be discussed and interpreted with the help of material characterization techniques available at CERN and the Ruhr-University Bochum.
Saturday 20 September 2008
Sunday 21 September 2008
Monday 22 September 2008
Tuesday 23 September 2008
Wednesday 24 September 2008
Thursday 25 September 2008
Friday 26 September 2008
Saturday 27 September 2008
Sunday 28 September 2008
Monday 29 September 2008
Tuesday 30 September 2008
Wednesday 1 October 2008
Thursday 2 October 2008
Friday 3 October 2008
09:00
Sources of «high energy» particles obtained with UHI lasers
-
Mathias Gerbaux
Sources of «high energy» particles obtained with UHI lasers
Mathias Gerbaux
09:00 - 10:00
Room: 6/2-004
This talk will focus on the characterization of the beams of electrons and protons with energies above a few MeV produced in the interaction of an ultra-intense (~10^19 W.cm-2) laser beam with a 10 µm thick solid target. The properties of these beams (transience, intensity and continuous energy distribution especially) make their characterization complex and leaded us to develop specific methods. I will present these ones along with experimental results obtained in different facilities for the study of the electron beams as a function of the target material. I will also briefly discuss an experiment carried out with similar techniques to characterize the proton beam produced at an higher power laser facility. This experiment demonstrated the possibility to induce nuclear reaction in a plasma and to measure quantitatively the reaction rate in preparation. This opens the way to probing of the perturbation of the nucleus-electronic shells coupling by a strong electromagnetic field.
Saturday 4 October 2008
Sunday 5 October 2008
Monday 6 October 2008
Tuesday 7 October 2008
Wednesday 8 October 2008
Thursday 9 October 2008
Friday 10 October 2008
Saturday 11 October 2008
Sunday 12 October 2008
Monday 13 October 2008
Tuesday 14 October 2008
Wednesday 15 October 2008
Thursday 16 October 2008
Friday 17 October 2008
Saturday 18 October 2008
Sunday 19 October 2008
Monday 20 October 2008
Tuesday 21 October 2008
Wednesday 22 October 2008
Thursday 23 October 2008
Friday 24 October 2008
Saturday 25 October 2008
Sunday 26 October 2008
Monday 27 October 2008
Tuesday 28 October 2008
Wednesday 29 October 2008
Thursday 30 October 2008
Friday 31 October 2008
Saturday 1 November 2008
Sunday 2 November 2008
Monday 3 November 2008
Tuesday 4 November 2008
Wednesday 5 November 2008
Thursday 6 November 2008
Friday 7 November 2008
Saturday 8 November 2008
Sunday 9 November 2008
Monday 10 November 2008
Tuesday 11 November 2008
Wednesday 12 November 2008
Thursday 13 November 2008
Friday 14 November 2008
Saturday 15 November 2008
Sunday 16 November 2008
Monday 17 November 2008
Tuesday 18 November 2008
Wednesday 19 November 2008
Thursday 20 November 2008
Friday 21 November 2008
Saturday 22 November 2008
Sunday 23 November 2008
Monday 24 November 2008
Tuesday 25 November 2008
Wednesday 26 November 2008
Thursday 27 November 2008
09:00
Petawatt lasers: status quo and applications to particle acceleration
-
Efim Khazanov
(
Institute of Applied Physics, Nizhniy Novgorod
)
Petawatt lasers: status quo and applications to particle acceleration
Efim Khazanov
(
Institute of Applied Physics, Nizhniy Novgorod
)
09:00 - 10:00
Room: 6/2-004
The petawatt laser power was achieved as early as in 1997 based on chirped pulse amplification in Nd:glass. Many institutes are going to obtain this power level, but any substantial increase is limited in principle by the reasons mentioned below. All devices and projects now available may be classified into three types according to the gain medium they employ: 1) neodymium glass, 2) Ti:sapphire and 3) optical parametric amplifiers with KDP and DKDP crystals. A narrow bandwidth of Nd glasses restricts typically the compressed pulse duration to about 500 fs. Small (10cm) aperture of Ti:sapphire crystals limits the pulse energy due to optical breakdown and self-focusing. Parametric amplifiers are free of above disadvantages. DKDP crystals have an aperture of 40 cm and more and the gain bandwidth corresponds to the 15 fs duration of the amplified pulse. Thus, using an optical parametric amplifier is one of the most promising ways of overcoming the petawatt power barrier. We will discuss the petawatt laser facility in the Institute of Applied Physics of Russian Academy of Science (Nizhny Novgorod) and also the most promising applications of such lasers: electron and ion acceleration.
Friday 28 November 2008
09:00
The CLIC FFS, ATF2 ultra-low betas and even more chromatic proposals
-
Rogelio Tomas
(
CERN
)
The CLIC FFS, ATF2 ultra-low betas and even more chromatic proposals
Rogelio Tomas
(
CERN
)
09:00 - 10:00
Room: 6/2-004
The CLIC Final Focus System has a chromaticity four times larger than the ILC and its scaled testbed ATF2. In order to prove the feasibility of CLIC-like systems we have proposed to reduce the ATF2 IP betas by a factor of four. This will also serve to study the tuning difficulty versus IP spot size hoping to extrapolate to the smaller beam sizes of ILC and CLIC. Andrei Seryi's recent proposal of doubling the CLIC L* will also be briefly discussed.
Saturday 29 November 2008
Sunday 30 November 2008
Monday 1 December 2008
Tuesday 2 December 2008
Wednesday 3 December 2008
Thursday 4 December 2008
Friday 5 December 2008
09:00
Compton Based Polarized Positron Sources for e-/e+ Linear Colliders
-
Alessandro Vivoli
Compton Based Polarized Positron Sources for e-/e+ Linear Colliders
Alessandro Vivoli
09:00 - 10:00
Room: 6/2-004
There is a strong request for high intensity polarised positron beams for e-/e+ linear colliders (ILC, CLIC). In order to fulfill this request, two schemes of polarised positron source have been studied: Undulator based and Compton based. I will present a brief introduction to Compton based polarised positron sources and will focus in particular on the capture section scheme, showing the design and simulation results of a capture section studied at LAL-Orsay for the ILC, and considering the changes necessary to fit the CLIC requirements.
Saturday 6 December 2008
Sunday 7 December 2008
Monday 8 December 2008
Tuesday 9 December 2008
10:00
Permanent Magnet work 1995 to Present and Ground Motion Studies at Fermilab
-
James Volk
(
FNAL
)
Permanent Magnet work 1995 to Present and Ground Motion Studies at Fermilab
James Volk
(
FNAL
)
10:00 - 11:00
Room: 6/2-004
Since 1995 research and development of permanent magnets has been done at Fermilab. The most important effort was the building of the Recycler ring for storage of anti protons. This is a 3.6 km in circumference ring made with 486 magnets all using strontium ferrite permanent magnets. Up to 450 x 10^10 anti protons are stored in this ring. Basic design parameters and assembly techniques used for the recycler will be discussed. In addition work done on adjustable quadrupole magnets will be discussed. These are high field (greater than 100 Tesla per meter gradient) quadrupoles with an adjustable gradient of 20% of full field. Understanding slow and fast ground motion is important for the successful operation and design for present and future colliders. Since 2000 there have been several studies of ground motion at Fermilab. Several different types of hydro static water levels have been used to study slow ground motion (less than 1 Hertz) seismometers have been used for fast (greater than 1 Hertz) motions. Data have been taken at the surface and at locations 100 meters below the surface. Data and results of both slow and fast ground motion will be discussed in particular the effects of natural and cultural sources of motion.