2011 Particle Accelerator Conference - List of Authors (Fedurin, M.G.)

Paper

Title

Page

Witness Bunch Acceleration in a Multi-bunch PWFA

712

P. Muggli, B.A. Allen, Y. Fang
USC, Los Angeles, California, USA
M. Babzien, M.G. Fedurin, K. Kusche, R. Malone, C. Swinson, V. Yakimenko
BNL, Upton, Long Island, New York, USA

Funding: Work supported by US DoE and NSF
We present initial experimental results showing the excitation of plasma wakefields by a train of two drive bunches. These wakefields are experienced by a trailing witness bunch that gains energy while retaining a finite energy spread. These well controlled plasma wakefield accelerator (PWFA) experiments are important to test the theory of the PWFA and serve as a testbed for techniques that will be used in high energy experiments.

Slides TUOBN3 [5.432 MB]

WEP107

CSR Shielding Experiment

1677

V. Yakimenko, A.V. Fedotov, M.G. Fedurin, D. Kayran
BNL, Upton, Long Island, New York, USA
V. Litvinenko
Stony Brook University, Stony Brook, USA
P. Muggli
USC, Los Angeles, California, USA

It is well known that the emission of coherent synchrotron radiation (CSR) in a dipole magnets leads to increase in beam energy spread and emittance. At the Brookhaven National Laboratory Accelerator Test Facility (ATF) we study the suppression of CSR emission affect on electron beam in a dipole magnet by two vertically spaced conducting plates. The gap between the plates is controlled by four actuators and could be varied from 0 to 14 mm. Our experimental results show that closing the plates significantly reduces both the beam energy loss and CSR-induced beam energy spread. In this paper we present selected results of the experiment and compare then with rigorous analytical theory.

WEP126

Progress in Experimental Study of Current Filamentation Instability

1719

B.A. Allen, P. Muggli
USC, Los Angeles, California, USA
M. Babzien, M.G. Fedurin, K. Kusche, V. Yakimenko
BNL, Upton, Long Island, New York, USA
C. Huang
LANL, Los Alamos, New Mexico, USA
J.L. Martins, L.O. Silva
IPFN, Lisbon, Portugal
W.B. Mori
UCLA, Los Angeles, California, USA

Funding: Work supported by Department of Energy and National Science Foundation
Current Filamentation Instability, CFI, is of central importance for the propagation of relativistic electron beams in plasmas. CFI could play an important role in the generation of magnetic fields and radiation in the after-glow of gamma ray bursts and also in energy transport for the fast-igniter inertial confinement fusion concept. Simulations were conducted with the particle-in-cell code QuickPIC* for e^- beam and plasma parameters at the Brookhaven National Laboratory – Accelerator Test Facility, BNL-ATF. Results show that for a 2cm plasma the instability reaches near saturation. An experimental program was proposed and accepted at the BNL-ATF and an experiment is currently underway. There are three components to the experimental program: 1) imaging of the beam density/filaments at the exit from the plasma, 2) measurement and imaging of the transverse plasma density gradient and measurement of the magnetic field and 3) identifying the radiation spectrum of the instability. Preliminary results from phase one will be presented along with the progress and diagnostic design for the following phases of the experiment.
* C. Huang et. al. Journal of Computational Physics 217, 2(2006)

Paper	Title	Page
TUOBN3	Witness Bunch Acceleration in a Multi-bunch PWFA	712
	P. Muggli, B.A. Allen, Y. Fang USC, Los Angeles, California, USA M. Babzien, M.G. Fedurin, K. Kusche, R. Malone, C. Swinson, V. Yakimenko BNL, Upton, Long Island, New York, USA
	Funding: Work supported by US DoE and NSF We present initial experimental results showing the excitation of plasma wakefields by a train of two drive bunches. These wakefields are experienced by a trailing witness bunch that gains energy while retaining a finite energy spread. These well controlled plasma wakefield accelerator (PWFA) experiments are important to test the theory of the PWFA and serve as a testbed for techniques that will be used in high energy experiments.
	Slides TUOBN3 [5.432 MB]

WEP107	CSR Shielding Experiment	1677
	V. Yakimenko, A.V. Fedotov, M.G. Fedurin, D. Kayran BNL, Upton, Long Island, New York, USA V. Litvinenko Stony Brook University, Stony Brook, USA P. Muggli USC, Los Angeles, California, USA
	It is well known that the emission of coherent synchrotron radiation (CSR) in a dipole magnets leads to increase in beam energy spread and emittance. At the Brookhaven National Laboratory Accelerator Test Facility (ATF) we study the suppression of CSR emission affect on electron beam in a dipole magnet by two vertically spaced conducting plates. The gap between the plates is controlled by four actuators and could be varied from 0 to 14 mm. Our experimental results show that closing the plates significantly reduces both the beam energy loss and CSR-induced beam energy spread. In this paper we present selected results of the experiment and compare then with rigorous analytical theory.

WEP126	Progress in Experimental Study of Current Filamentation Instability	1719
	B.A. Allen, P. Muggli USC, Los Angeles, California, USA M. Babzien, M.G. Fedurin, K. Kusche, V. Yakimenko BNL, Upton, Long Island, New York, USA C. Huang LANL, Los Alamos, New Mexico, USA J.L. Martins, L.O. Silva IPFN, Lisbon, Portugal W.B. Mori UCLA, Los Angeles, California, USA
	Funding: Work supported by Department of Energy and National Science Foundation Current Filamentation Instability, CFI, is of central importance for the propagation of relativistic electron beams in plasmas. CFI could play an important role in the generation of magnetic fields and radiation in the after-glow of gamma ray bursts and also in energy transport for the fast-igniter inertial confinement fusion concept. Simulations were conducted with the particle-in-cell code QuickPIC* for e^- beam and plasma parameters at the Brookhaven National Laboratory – Accelerator Test Facility, BNL-ATF. Results show that for a 2cm plasma the instability reaches near saturation. An experimental program was proposed and accepted at the BNL-ATF and an experiment is currently underway. There are three components to the experimental program: 1) imaging of the beam density/filaments at the exit from the plasma, 2) measurement and imaging of the transverse plasma density gradient and measurement of the magnetic field and 3) identifying the radiation spectrum of the instability. Preliminary results from phase one will be presented along with the progress and diagnostic design for the following phases of the experiment. * C. Huang et. al. Journal of Computational Physics 217, 2(2006)