Performance of the Advanced Photon Source (APS) linear accelerator

White, M.; Arnold, N.; Berg, William J.; Cours, A.; Fuja, R.; Goral, J.P.; Grelick, A.; Ko, K.; Qian, Yuping; Russell, Thomas J.; Sereno, N.S.; Wesolewski, W.

doi:10.1109/pac.1995.505133

Cited by 10 publications

(6 citation statements)

References 9 publications

(1 reference statement)

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“…This first LEUTL experiment is often referred to as the APS SASE FEL and utilizes a string of undulators that are similar to those found in the APS storage ring, each having an undulator parameter K of 3.1, a period of 3.3 cm, and a length of 2.4 m. LEUTL presently (Fall 2000) employs nine identical undulators spaced by ≅ 0.38 m. This space contains a combined function dipole-corrector and quadrupole magnet, electron beam diagnostics, and optical beam diagnostics [18]. LEUTL uses a photocathode-rf gun [19] and drive-laser system [20] to generate electrons that are further accelerated through the APS linear accelerator (linac) [21]. (Note: this linac is also used as part of the injector system to the APS storage ring.)…”

Section: Possible Experimental Layoutmentioning

confidence: 99%

A possible experiment at LEUTL to characterize surface roughness Wakefield effects

Biedron

Dattoli

Fawley

et al. 2001

AIP Conference Proceedings

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Abstract. Wakefield effects due to internal vacuum chamber roughness may increase the electron beam energy spread and so have become an immediate concern for future x-ray free-electron laser (FEL) project developments such as the SLAC Linac Coherent Light Source (LCLS) and the DESY TESLA x-ray FEL. We describe a possible experiment to characterize the effects of surface roughness on an FEL driven by self-amplified spontaneous emission (SASE) operation. Although the specific system described is not completely identical to the above-proposed projects, much useful scaling information could be obtained and applied to shorter wavelength systems.

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Section: Possible Experimental Layoutmentioning

confidence: 99%

A possible experiment at LEUTL to characterize surface roughness Wakefield effects

Biedron

Dattoli

Fawley

et al. 2001

AIP Conference Proceedings

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“…The parameters that define the linac beam (1) are driven by the requirement that the PXR be completely filled with 6.6 nC of positrons in 0.5 seconds.…”

Section: Structure Of the Positron Linac Beam In The Time Domainmentioning

confidence: 99%

Positron beam position measurement for a beam containing both positrons and electrons

Sereno¹,

Fuja²

1997

AIP Conference Proceedings

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Positron beam position measurement for the Advanced Photon Source (XPS) linac beam is affected by the presence of electrons that are also captured and accelerated along with the positrons. This paper presents a method of measuring positron position in a beam consisting of alternating bunches of positrons and electrons. The method is based on Fourier analysis of a stripline signal at the bunching and first harmonic frequencies. In the presence of a mixed species beam, a certain linear combination of bunching and first harmonic signals depends only on the position and charge of one specie of particle. A formula is derived for the stripline signal at all harmonics of the bunching frequency and is used to compute expected signal power at the bunching and first harmonic frequencies for typical electron and positron bunch charges. The stripline is calibrated by measuring the signal power content at the bunching and first harmonic frequencies for a single species beam. A circuit is presented that will be used with an APS positron linac stripline beam position monitor to detect the bunching and first harmonic signals for a beam of positrons and electrons.

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“…The positron beam is produced by irradiating a tungsten target with a 1.7A, 200 MeV electron beam (1). Low-energy positrons and electrons generated in the pair-production process are captured by the Sband (2856 MHz) linac rf wave and accelerated together to the end of the linac.…”

Section: Introductionmentioning

confidence: 99%

Calibration of an advanced photon source linac beam position monitor used for positron position measurement of a beam containing both positrons and electrons

Sereno¹

1998

AIP Conference Proceedings

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Performance of the Advanced Photon Source (APS) linear accelerator

Abstract: A

Cited by 10 publications

References 9 publications

A possible experiment at LEUTL to characterize surface roughness Wakefield effects

A possible experiment at LEUTL to characterize surface roughness Wakefield effects

Positron beam position measurement for a beam containing both positrons and electrons

Calibration of an advanced photon source linac beam position monitor used for positron position measurement of a beam containing both positrons and electrons

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