1. TESLA Technology Collaboration KEK, 2-5 December 2014
Introduction and update since last meeting
O.Napoly, CEA-Saclay
TTC Chairman
02/12/2014

2. Hitoshi Hayano-san, KEK for chairing the meeting and the LOC.
The TTC meeting is hosted in Tsukuba, by the High Energy Accelerator Research Organization (KEK). Many thanks to:
Hitoshi Hayano-san, KEK for chairing the meeting and the LOC.
Many thanks to:
his collaborators for welcoming us and organizing the meeting.
02/12/2014

3. TTC Members (1/2)
02/12/2014

4. TTC Members (2/2) TTC membership consists of 57 Institutes,
from 14 countries
and 2 International Organisations
The TTC Web Page has been upgraded to include
SRF accelerators in Europe
SRF facilities at FNAL and CEA
It should be completed…
thanks to Katrin Lando (DESY) for her administrative support
02/12/2014

5. Update since the last TTC meeting in March 2014 at DESY
02/12/2014

6. First modules in E-XFEL Tunnel
I wish everyone here as much excitment as experienced by the E-XFEL cold linac builders, and as much trouble as some ! 
02/12/2014

7. 2nd TTC Topical Workshop ‘SRF Cryomodule Clean Room Assembly’
Goal of the Workshop:
collect, compare and discuss the best practices on clean room equipment and procedures from various international laboratories on the diversity of low to high beta superconducting RF cryomodules, primarily in order to circumvent cavity gradient degradation after cryomodule assembly.
02/12/2014

8. 2nd TTC Topical Workshop ‘SRF Cryomodule Clean Room Assembly’
70 participants, excellent atmosphere for discussions and exchanges
(cf. C. Madec’s summary talk)
02/12/2014

9. New Developments since the last TTC meeting in March 2014
Two major findings…(of different impacts though)
1) Cryomodule production is an exhausting job !
2) The measurement of the Higgs boson Yukawa coupling coefficients to fermions through partial decay widths:
Linearity (slope = 1 in log-log scale) between fermion masses and Yukawa couplings !!!!
02/12/2014

10. The era of e+e- circular colliders (SPEAR, TRISTAN, PEP, PETRA, LEP)
The most beautiful plot of particle physics until the LHC
02/12/2014

11. The era of e+e- circular colliders (SPEAR, TRISTAN, PEP, PETRA, LEP)
The R ratio can be calculated in a model independent way from the basics of quantum field theory, e.g. Z resonance, except for:
1) the existence of the c and b quarks and their charge (2/3, -1/3)
proof of their fractional charge
2) Some details of quarkonium states spectroscopy.
3) hadron resonances ~1 GeV
Question:
Will the R ratio be measured ever in man’s life
beyond 205 GeV c.m. energy ?
02/12/2014

12. Coherent picture of the universe at small scale
Higgs boson decay in 4 leptons
at the LHC
02/12/2014

13. The LHC uses SCRF Technology derived from LEP2
SCRF at the LHC
The LHC uses SCRF Technology derived from LEP2
cf E. Ciapala
at TTC Beijing
8 SC cavities/beam – total 16, in 4 cryomodules at IR4
2 MV nominal per cavity, 5.5 MV/m nominal gradient
Low R/Q: 44 W
Variable power coupler, High Power handling
11,000 < Qext < 200,000
One klystron per cavity, rating 330 kW
Main Coupler
Port
HOM Port
Cryostat section
Bare cavity
02/12/2014

14. Higgs Couplings Questions:
The essence of any Higgs sector
Consistent with the standard model of the scalar Higgs
Questions:
Is the Higgs boson an elementary scalar field ? or Has the Higgs boson a finer structure and the standard model is an effective theory ?
02/12/2014

15. My advice : the Future e+e- Microscope
Let us put our talent, expertise, and energy to help particle physicists worldwide decide and build a new electron-positron collider with GeV c.m. energy ! Linear or circular collider requires outstanding SCRF ‘linacs’ : TTC is the core expert group for technical design and economical feasibility.
02/12/2014

16. Photon Science: 4th generation light sources
SASE – Self-Amplified Spontaneous Emission
Kondratenko, Saldin (1979)
Bonifacio, Pellegrini, Narducci (1984)
X-ray light
3 GeV
First principle: production of X-Ray light
Electron bunch oscillation period in lab frame frame is u/c
Electron bunch oscillation period in its rest frame is u/c, due to Lorentz time dilatation from rest to lab frames  radiation at c/u frequency in rest frame
Photon radiation frequency in lab frame is 2c/u due to the relativistic Doppler effect.
02/12/2014

17. 4th generation light sources
Origin of Microbunching
electron trajectory
Second principle: micro-bunching
Radiation electric field has a small component parallel to electron velocity, which can accelerate or decelerate electrons
undulator axis a
02/12/2014

18. 4th generation light sources
Third principle: coherent radiation (T. Shintake)
Micro bunches are coherent at the X scale, they radiate as a ‘macroscopic’ charge
02/12/2014

19. Applied to larger and larger complex molecules:
Application to Biology :
bio-crystallography
Courtesy M. Altarelli
Applied to larger and larger complex molecules:
Lysozyme
(Enzyme from poultry) ?
Determination of the atomic
structure of the molecule!
X-rays
Crystal
Detector
Computer
02/12/2014

20. Limits of Synchrotron (3rd generation) for Bio-crystallography
Courtesy M. Altarelli
In spite of its extraordinary success, synchrotron bio-crystallography meets some limitations:
Need for crystals > ( µm)3 (membrane proteins?)
Radiation damage limits resolution… freezing a partial remedy
Crystal of Bovine Enterovirus 2 (BEV 2), 0.5 s, 108 ph/µm2
D. Axford et al., Acta Cryst D68, 592 (2012)
02/12/2014

21. SASE FEL short pulses Speed may be the answer!
Courtesy M. Altarelli
Speed may be the answer!
“Diffraction before destruction”
02/12/2014

22. My advice : E-XFEL and LCLSII
E-XFEL and LCLSII, as high duty cycle or CW 4th generation light sources, have a higher potentials (~104 pulse/s) than warm linacs.
There are cross-benefits for these two projects in the fields SCRF technology: they are already collaborating.
In addition:
E-XFEL construction experience will profit to the ILC
LCLSII construction experience will profit to FCC/CEPC
TTC includes all the partners labs.
02/12/2014

23. Energy Global Challenge
Electricity generation (TWh/year)
GreenHouse Gas emissions (Gt CO2/year)
02/12/2014

24. Generic ADS Design
The ADS accelerator belongs to the generic ‘low-beta’ proton and deuteron drivers used by pulsed machine like ESS or SPL, or Rare Isotope drivers, like FRIB or EURISOL.
China and India are leading the world research and development of ADS linacs, including the SCRF linac.
TTC includes all the partners labs.
02/12/2014

25. TTC Priorities 2011-2014 Performances Applications Economics
‘PAE’
Applications
Economics
of SCRF systems
02/12/2014

26. KEK Meeting Scientific Program
Programme Committee:
Eiji Kako (KEK), chair, Camille Ginsburg (FNAL), Hitoshi Hayano (KEK),
Wolf-Dietrich Möller (DESY), Olivier Napoly (CEA)
WG1: ‘Module Tests and Procedures’
Conveners: Elvin Harms (Fermilab), Denis Kostin (DESY)
WG2: ‘Module Assembly (-post clean room)’
Conveners: Serena Barbanotti (DESY), Kay Jensch (DESY), Sang-ho Kim (ORNL)
WG3: ‘High Q0’
Conveners: Gianluigi Ciovati (Jefferson Lab), Charles Reece (Jefferson Lab), Detlef Reschke (DESY)
WG4: ‘Cavity Fabrication and Preparation’
Conveners: Kensei Umemori(KEK), John Mammosser (ORNL)
WG5: ‘Low beta and Crab Cavities’Conveners:
Conveners: Sebastien Bousson (IPN Orsay), Robert Laxdal (TRIUMF), Jiyuan Zhai(IHEP)
WG6: ‘Peripheral Key Components’
Conveners: Guillaume Devanz (CEA), Akira Yamamoto (KEK)
02/12/2014

27. I look forward to a rich and excellent TTC Collaboration meeting
02/12/2014