Long Range (Advanced)
Accelerator R&D User Facility
Vitaly Yakimenko
ATF/BNL
User facility or Lab project
• Different mentality
–
–
–
–
Time to study problem and not to concentrate on a solution
Support Vs. Research scientists
Staff retention
Well defined project schedule VS. long timeline
• It is difficult if not impossible to predict beneficiary of
the research, yet HEP is paying for it
• Students:
– excellent opportunities to train students
– will make mistakes, facility will be scrutinized more when
students are involved
– trained students more likely work outside of HEP
• Planning how to preserve facility during difficult budget
time is important
Inverse Free Electron Laser
•
Proposed by R. Palmer
– J. Appl. Phys. 43, 3014-23 (1972).
•
Tested at ATF as accelerator.
First Staging of Two Laser Accelerators
CO2 beam
– PRL 77, 2690 (1996)
•
Used as key element in ATF
experiments:
– Microbunching: PRL 80, 4418 (1998)
– STELLA, PRL 86, 4041 (2001)
– HGHG, Science, 289 (2000) 932,
PRL 86, 5902 (2001)
– STELLA II, PRL 92, 54801 (2004)
– PASER, PRL 97, 134801 (2006)
…
•
STELLA
Accelerator
(IFEL2)
-90o
-2.6mm
Buncher
(IFEL1)
0o
90o
2.6mm
IFEL is key element to:
– Preserve emittance during compression
at LCLS
– High Gain Harmonic Generation
– Optical stochastic cooling
– Short X ray beams at ALS
• IFEL is a typical
example of continued
surprises of applicability
of Advanced
Accelerator R&D.
Competition
is an interaction, in which the fitness of one is lowered by the
presence of another.
Commensalism
is a class of relationship where one organism benefits but the other
is unaffected.
Remora sharks: Remora sharks are endowed with an adhesive disk on the
dorsal surface of their heads. They use this adhesive disk to “hitch a ride” on
larger animals, usually whales, which tend to be sloppy eaters. When food
floats away from the whale’s mouth, the remora can unhitch itself and collect
the scraps of food floating by.
Mutualism
is an interaction between two organisms, where each individual
derives a fitness benefit.
Cons:
Difficult to
• explain value of unfocused
program
• support long term goals
Pros:
Diversity helps to
• experimental -- to deliver
results/ publications/ PhDs on a
regular basis.
• disciplinary, agencies and
geographical -- with motivation
• review/manage small
and to survive difficult times
scale/budget user facility with
very diverse program
• Flexibility of the program and
portfolio of expertise.
• manage in the National
laboratory ever changing
environment/ protection/
• Well being of the user facility
documentation: (ATF has more
depends on the user community.
complex laser interlock system
Natural mutual support is
then the rest of BNL).
exiting to see and easy to
support.