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NON-DESTRUCTIVE SINGLE PASS MONITOR OF LONGITUDINAL CHARGE DISTRIBUTION

NON-DESTRUCTIVE SINGLE PASS MONITOR OF LONGITUDINAL CHARGE DISTRIBUTION. P.V.Logatchov, P.A.Bak, E.A.Gousev, A.A.Starostenko, N.S.Dikansky, M.V.Korabelnikov, S.V.Shiyankov, BINP, Novosibirsk, Russia Contact e-mail: logatchov@inp.nsk.su. Y. Linear scattering. X. }. r. Z. }. r. 0. for.

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NON-DESTRUCTIVE SINGLE PASS MONITOR OF LONGITUDINAL CHARGE DISTRIBUTION

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  1. NON-DESTRUCTIVE SINGLE PASS MONITOR OF LONGITUDINAL CHARGE DISTRIBUTION P.V.Logatchov, P.A.Bak, E.A.Gousev, A.A.Starostenko, N.S.Dikansky, M.V.Korabelnikov, S.V.Shiyankov, BINP, Novosibirsk, Russia Contact e-mail: logatchov@inp.nsk.su

  2. Y Linear scattering X } r Z } r 0

  3. for g 1. >>1,  2. max <<1. y

  4. The longitudinal distribution of charge density in an bunch: Single pass beam monitor is sutable tool for: 1. Longitudinal charge distribution 2. Beam trains transverse distribution 3. Wake-fields observation after the bunch

  5. Scheme of LCDM

  6. The bunch parameters range for better then 10% time resolution of this method: • bunch peak current: 10 A - 250 A • bunch length: 20 ps - 2000 ps • gamma factor: > 30 • offset parameres: < 1/6 of bunch length

  7. Single bunch regime

  8. 1 2 Single bunch regime: offset parameter goes down 3 4

  9. Collision with the single bunch

  10. Single bunch regime: offset parameter goes down

  11. Multi bunch regime: offset parameter goes down 1-4: offset parameter > 0 5 : offset parameter  0 6-8: offset parameter < 0 1 2 3 4 5 6 7 8

  12. Pictures with wakes Two bunches Collision with single bunch Wakes start to appear

  13. The bunch with starting wakes Wake fields 10 ns after bunch Wake fields150 ns after bunch 330 ps

  14. Different vert. probe beam position 330 ps

  15. Observation of the wake fields corresponded to the frequency of 8714 MHz

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