1. G. Dattoli and F. Nguyen ENEA-FRASCATI
Free Electron Laser: can it become a tool for «fundamental» Physics research?
G. Dattoli and F. Nguyen
ENEA-FRASCATI

2. Whatever we do…oscillators, SASE…
FEL process can be reduced to an Elementary Interaction

3. One Atom maser

4. Two Level masing

5. What about FEL?
Bambini-Renieri
Frame

6. Momentum conservation
Elementary….
Momentum conservation

7. Elementary…. Going beyond the Bloch Nordsieck theorem
Recoil Kinetic energy

8. Momentum recoil and Gain

9. Jaynes -Cummings FEL

10. Why such a detour?
Just to remind that FEL is not just a technological device……
….That it can be exploited as an experimental tool covering realmof research not strictly associated with the main stream…

11. Dr. Madey’s terrific beam enlights the darkness and solves any mistery…

12. …And, may be, other… FEL for g-g collider
Double FEL scheme
Cross section

13. g-g-FEL number of counts

14. A detour from universe energy buget to stron CP problem
The Solution: A new field cancelling this effect 14 14

15. The new field bring a particle the Axion: the origin of the name15 15

16. Few more details
All these are classified as Weakly Interacting Slim Particles:
Hypothetical bosons with mass m < 1 eV/c2 16 16

17. Axion interaction with matter?
Primakoff- Effect
photon
Virtual-photon
Axion

18. Light Shining through the Wall
Ideal physics case: reproduce axions in laboratory!
EM radiation free to propagate in a B field region, in vacuum
Photon detectors properly shielded
Any signal is related to something non-standard 18 18

19. Search for Solar Axions
Axion Helioscope
(Sikivie 1983)
Primakoff
production
Axion flux N g
Magnet S
Axion-Photon-Oscillation
Tokyo Axion Helioscope (“Sumico”)
(Results since 1998, up again 2008)
CERN Axion Solar Telescope (CAST)
(Data since 2003)
Alternative technique:
Bragg conversion in crystal
Experimental limits on solar axion flux
from dark-matter experiments
(SOLAX, COSME, DAMA, CDMS ...)
Raphelt 2011

20. SLW Experiment

21. Intracavity photon axion interaction

22. AXION & FEL=AXEL
Photon-Axion-conversion
Axion-Photon Conversion

25. Number of Counts vs. FEL-O Parameters

26. AXEL