Transcript . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . .. . . . . . . Fourier Series Pulse Compression Damping Ring Kicker . . . .. . . . . . . . . . . . . . . . . . . . . George Gollin University of Illinois at Urbana-Champaign and Fermi National Accelerator Laboratory . . . . ..

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Fourier Series Pulse Compression
Damping Ring Kicker
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George Gollin
University of Illinois at Urbana-Champaign
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Fermi National Accelerator Laboratory
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George Gollin, Damping ring kickers, KEK ILC, November 2004
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Perhaps larger (but less precise) impulse at injection, smaller (but more
precise) impulse at extraction will be desirable.
Small ring kicker rise, fall times can be asymmetric:
• leading edge < 6 ns, trailing edge < 60 ns
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George Gollin, Damping ring kickers, KEK ILC, November 2004
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Dog
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TDR)
kicker .specs:
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. G-m (2 keV/c)
• impulse:
100 G-m (3 MeV/c)
± 0.07
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• residual (off)
impulse: 0 ± 0.07 G-m (2 .keV/c)
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• rise/fall time: < 20 ns
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Combine this. with a pulse compression system
to drive a small number
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of low-Q cavities.
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Illinois, Fermilab, Cornell are involved.
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Instead
of a. pulsed
kicker,
construct
a kicking
pulse... from a sum
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Fourier series pulse compression
kicker
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Joe Rogers
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Cornell
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Brian Chase
David Finley
Chris Jensen
George Krafczyk
Shekhar Mishra
François Ostiguy
Ralph Pasquinelli
Phillipe Piot
John Reid
Vladimir Shiltsev
Nikolay Solyak
Ding Sun…
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Guy Bresler
Joe Calvey
Michael Davidsaver
Keri Dixon
George Gollin
Mike Haney
Tom Junk
Jeremy Williams
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Fermilab
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University of Illinois.
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US. university-based Linear
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This
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studies: use Fermilab A0 photoinjector
beam (16 . MeV
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electrons) .for studies: .
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1. build a fast, simple strip line kicker
2. use the kicker to study the timing/stability properties of the
A0 beam
3. build a single-module pulse compression kicker
4. study its behavior at A0
5. perform more detailed studies in a higher energy, low
emittance beam (ATF??)
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George Gollin, Damping ring kickers, KEK ILC, November 2004
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Fermilab/Illinois activities
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Right
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and RF. engineering
discussions…
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George Gollin, Damping ring kickers, KEK ILC, November 2004
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…and writing it. up so it is. clearly
described…
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. are calculable
Start with. a. simple
kicker
whose
properties
and can
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independently of
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. amplitude and
Most important: how. well can we measure a device’s
timing stability with the A0 beam?
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flanges
beam pipe
BPM
beam pipe
BPM
BPM
stainless steel
pipe
BPM
conducting rods
Fermilab is currently building this. Probably ready by January 2005.
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George Gollin, Damping ring kickers, KEK ILC, November 2004
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…and building
a stripline
kicker.
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last spring.
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EOI submitted
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Space in beamline will be available ~January 2005
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George Gollin, Damping ring kickers, KEK ILC, November 2004
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16 MeV electron
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good
spot
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Test it in the FNAL A0 photoinjector
beam
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involved
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Fermilab RF
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UIUC HEP electronics design group’s chief is too.
So we’re making progress.
Goals:
• install strip line kicker in A0 by January, 2005
• understand A0 by spring, 2005
• investigate small pulse compression system by summer, 2005
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George Gollin, Damping ring kickers, KEK ILC, November 2004
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Design, then
build
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module
components.
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UIUC/FNAL,
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