TY - JOUR
T1 - Coherence limits of free electron lasers
AU - Gover, A.
AU - Dyunin, E.
N1 - Funding Information:
Manuscript received December 17, 2009; revised March 9, 2009; accepted April 4, 2010. Date of current version August 24, 2010. This work was supported in part by the Israel Science Foundation and by the Ludwig Jokel Fund.
PY - 2010
Y1 - 2010
N2 - The e-beam and radiation wave dynamics in the radiating and nonradiating beam transport sections of free electron lasers (FELs) are analyzed in the collective regime by use of a single transverse mode linear response formulation. This is employed to derive conditions for coherent operation of seeded high-gain FELs. It is shown that the level of incoherent selfamplified spontaneous emission radiation power can be controlled by adjusting the plasma oscillation phase in the nonradiating beam transport sections preceding the FEL, and that at short wavelengths the FEL coherence is limited by energy noise (rather than current shot-noise), and ultimately by quantum noise.
AB - The e-beam and radiation wave dynamics in the radiating and nonradiating beam transport sections of free electron lasers (FELs) are analyzed in the collective regime by use of a single transverse mode linear response formulation. This is employed to derive conditions for coherent operation of seeded high-gain FELs. It is shown that the level of incoherent selfamplified spontaneous emission radiation power can be controlled by adjusting the plasma oscillation phase in the nonradiating beam transport sections preceding the FEL, and that at short wavelengths the FEL coherence is limited by energy noise (rather than current shot-noise), and ultimately by quantum noise.
KW - Bunched particle beams
KW - Electron beams
KW - Free electron lasers (FEL)
KW - Index Terms-Accelerator beams
KW - Particle beam dynamics
KW - Shot noise
UR - http://www.scopus.com/inward/record.url?scp=77956525560&partnerID=8YFLogxK
U2 - 10.1109/JQE.2010.2049476
DO - 10.1109/JQE.2010.2049476
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AN - SCOPUS:77956525560
SN - 0018-9197
VL - 46
SP - 1511
EP - 1517
JO - IEEE Journal of Quantum Electronics
JF - IEEE Journal of Quantum Electronics
IS - 11
ER -